TY  - CONF
AU  - Pergal, Marija
AU  - Kodranov, Igor
AU  - Nikodinović-Runić, Jasmina
AU  - Ostojić, Sanja
AU  - Dojičinović, Biljana P.
AU  - Antić, Bratislav
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10806
AB  - Crosslinked polyurethanes (PUs) based on hyperbranched polyester and poly(dimethylsiloxane) (PDMS), which are thermosetting polymers, are one of the most representative products in the coating applications. To enhance the biomedical properties of PUs, we have attempted to incorporate PDMS as soft segments and silver-ferrite as nanoparticles in order to prepared PU nanocomposites (PU NCs). Silver ferrite nanoparticles were incorporated into crosslinked polyurethanes (PU NCs) with different soft poly(dimethylsiloxane) segments, via in situ polymerization. Herein, we report the nanomechanical properties, hydrophobicity and antifungal activities of PU NCs based on poly(dimethylsiloxane), 4,4’-methylenediphenyl diisocyanate and hyperbranched polyester of the second pseudogeneration, with different soft (PDMS) segment content. The nanomechanical properties of PU NCs were investigated by nanoindentation measurements, while the hydrophobicity of PU NCs was measured by water absorption properties. The fungicidal activities of PU NCs were evaluated against Candida albicans and Candida parapsilosis. PU NCs with lower soft segment content exhibited selective and good antifungal activity toward the tested fungi due to higher hydrophilicity and higher amount of Ag+ ion released. The selective fungicidal activity and low cytotoxicity of PU NCs with good nanomechanical properties ensure it is a candidate as coatings for medical devices.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade
T1  - Polyurethane/nanoferrite composite materials: antifungal and nanomechanical properties
SP  - 75
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10806
ER  - 

@conference{
author = "Pergal, Marija and Kodranov, Igor and Nikodinović-Runić, Jasmina and Ostojić, Sanja and Dojičinović, Biljana P. and Antić, Bratislav",
year = "2022",
abstract = "Crosslinked polyurethanes (PUs) based on hyperbranched polyester and poly(dimethylsiloxane) (PDMS), which are thermosetting polymers, are one of the most representative products in the coating applications. To enhance the biomedical properties of PUs, we have attempted to incorporate PDMS as soft segments and silver-ferrite as nanoparticles in order to prepared PU nanocomposites (PU NCs). Silver ferrite nanoparticles were incorporated into crosslinked polyurethanes (PU NCs) with different soft poly(dimethylsiloxane) segments, via in situ polymerization. Herein, we report the nanomechanical properties, hydrophobicity and antifungal activities of PU NCs based on poly(dimethylsiloxane), 4,4’-methylenediphenyl diisocyanate and hyperbranched polyester of the second pseudogeneration, with different soft (PDMS) segment content. The nanomechanical properties of PU NCs were investigated by nanoindentation measurements, while the hydrophobicity of PU NCs was measured by water absorption properties. The fungicidal activities of PU NCs were evaluated against Candida albicans and Candida parapsilosis. PU NCs with lower soft segment content exhibited selective and good antifungal activity toward the tested fungi due to higher hydrophilicity and higher amount of Ag+ ion released. The selective fungicidal activity and low cytotoxicity of PU NCs with good nanomechanical properties ensure it is a candidate as coatings for medical devices.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade",
title = "Polyurethane/nanoferrite composite materials: antifungal and nanomechanical properties",
pages = "75",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10806"
}

Pergal, M., Kodranov, I., Nikodinović-Runić, J., Ostojić, S., Dojičinović, B. P.,& Antić, B.. (2022). Polyurethane/nanoferrite composite materials: antifungal and nanomechanical properties. in Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade
Belgrade : Serbian Ceramic Society., 75.
https://hdl.handle.net/21.15107/rcub_vinar_10806

Pergal M, Kodranov I, Nikodinović-Runić J, Ostojić S, Dojičinović BP, Antić B. Polyurethane/nanoferrite composite materials: antifungal and nanomechanical properties. in Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade. 2022;:75.
https://hdl.handle.net/21.15107/rcub_vinar_10806 .

Pergal, Marija, Kodranov, Igor, Nikodinović-Runić, Jasmina, Ostojić, Sanja, Dojičinović, Biljana P., Antić, Bratislav, "Polyurethane/nanoferrite composite materials: antifungal and nanomechanical properties" in Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade (2022):75,
https://hdl.handle.net/21.15107/rcub_vinar_10806 .

TY  - JOUR
AU  - Petković, Branka B.
AU  - Ognjanović, Miloš
AU  - Krstić, Milena P.
AU  - Stanković, Vesna
AU  - Babincev, Ljiljana
AU  - Pergal, Marija V.
AU  - Stanković, Dalibor M.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8846
AB  - Mefenamic acid and indomethacin, medicaments belonging to the group of non-steroidal anti-inflammatory agents, were determined separately and simultaneously at anodically prepared BDDE. Differential pulse voltammetry was used to establish simple and fast analytical procedure based on electrooxidation of mefenamic acid at 0.6 V and indomethacin at 1.0 V (and 1.1 V). At optimal conditions, it was suitable for highly sensitive and selective determination of these compounds with LODs comparable to previously reported modified electrodes. Additionally, considering the importance of these compounds, we proposed precise and accurate quantification of these species based on green and simple pre-treatable electrochemical sensor. The effect of interfering agents (tablet ingredients and vitamins) was appeared to be negligibly confirming a favourable selectivity of the method. The proposed method was analytically applied by simultaneously determining mefenamic acid and indomethacin in pharmaceutical formulations. © 2020 Elsevier B.V.
T2  - Diamond and Related Materials
T1  - Boron-doped diamond electrode as efficient sensing platform for simultaneous quantification of mefenamic acid and indomethacin
VL  - 105
SP  - 107785
DO  - 10.1016/j.diamond.2020.107785
ER  - 

@article{
author = "Petković, Branka B. and Ognjanović, Miloš and Krstić, Milena P. and Stanković, Vesna and Babincev, Ljiljana and Pergal, Marija V. and Stanković, Dalibor M.",
year = "2020",
abstract = "Mefenamic acid and indomethacin, medicaments belonging to the group of non-steroidal anti-inflammatory agents, were determined separately and simultaneously at anodically prepared BDDE. Differential pulse voltammetry was used to establish simple and fast analytical procedure based on electrooxidation of mefenamic acid at 0.6 V and indomethacin at 1.0 V (and 1.1 V). At optimal conditions, it was suitable for highly sensitive and selective determination of these compounds with LODs comparable to previously reported modified electrodes. Additionally, considering the importance of these compounds, we proposed precise and accurate quantification of these species based on green and simple pre-treatable electrochemical sensor. The effect of interfering agents (tablet ingredients and vitamins) was appeared to be negligibly confirming a favourable selectivity of the method. The proposed method was analytically applied by simultaneously determining mefenamic acid and indomethacin in pharmaceutical formulations. © 2020 Elsevier B.V.",
journal = "Diamond and Related Materials",
title = "Boron-doped diamond electrode as efficient sensing platform for simultaneous quantification of mefenamic acid and indomethacin",
volume = "105",
pages = "107785",
doi = "10.1016/j.diamond.2020.107785"
}

Petković, B. B., Ognjanović, M., Krstić, M. P., Stanković, V., Babincev, L., Pergal, M. V.,& Stanković, D. M.. (2020). Boron-doped diamond electrode as efficient sensing platform for simultaneous quantification of mefenamic acid and indomethacin. in Diamond and Related Materials, 105, 107785.
https://doi.org/10.1016/j.diamond.2020.107785

Petković BB, Ognjanović M, Krstić MP, Stanković V, Babincev L, Pergal MV, Stanković DM. Boron-doped diamond electrode as efficient sensing platform for simultaneous quantification of mefenamic acid and indomethacin. in Diamond and Related Materials. 2020;105:107785.
doi:10.1016/j.diamond.2020.107785 .

Petković, Branka B., Ognjanović, Miloš, Krstić, Milena P., Stanković, Vesna, Babincev, Ljiljana, Pergal, Marija V., Stanković, Dalibor M., "Boron-doped diamond electrode as efficient sensing platform for simultaneous quantification of mefenamic acid and indomethacin" in Diamond and Related Materials, 105 (2020):107785,
https://doi.org/10.1016/j.diamond.2020.107785 . .

TY  - JOUR
AU  - Pergal, Marija V.
AU  - Kodranov, Igor D.
AU  - Dojčinović, Biljana P.
AU  - Avdin, Viacheslav V.
AU  - Stanković, Dalibor M.
AU  - Petković, Branka B.
AU  - Manojlović, Dragan D.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8994
AB  - Chlorine dioxide (ClO2) degradation of the organophosphorus pesticides azamethiphos (AZA) and dimethoate (DM) (10 mg/L) in deionized water and in Sava River water was investigated for the first time. Pesticide degradation was studied in terms of ClO2 level (5 and 10 mg/L), degradation duration (0.5, 1, 2, 3, 6, and 24 h), pH (3.00, 7.00, and 9.00), and under light/dark conditions in deionized water. Degradation was monitored using high-performance liquid chromatography. Gas chromatography coupled with triple quadrupole mass detector was used to identify degradation products of pesticides. Total organic carbon was measured to determine the extent of mineralization after pesticide degradation. Real river water was used under recommended conditions to study the influence of organic matter on pesticide degradation. High degradation efficiency (88–100% for AZA and 85–98% for DM) was achieved in deionized water under various conditions, proving the flexibility of ClO2 degradation for the examined organophosphorus pesticides. In Sava River water, however, extended treatment duration achieved lower degradation efficiency, so ClO2 oxidized both the pesticides and dissolved organic matter in parallel. After degradation, AZA produced four identified products (6-chlorooxazolo[4,5-b]pyridin-2(3H)-one; O,O,S-trimethyl phosphorothioate; 6-chloro-3-(hydroxymethyl)oxazolo[4,5-b]pyridin-2(3H)-one; O,O-dimethyl S-hydrogen phosphorothioate) and DM produced three (O,O-dimethyl S-(2-(methylamino)-2-oxoethyl) phosphorothioate; e.g., omethoate; S-(2-(methylamino)-2-oxoethyl) O,O-dihydrogen phosphorothioate; O,O,S-trimethyl phosphorodithioate). Simple pesticide degradation mechanisms were deduced. Daphnia magna toxicity tests showed degradation products were less toxic than parent compounds. These results contribute to our understanding of the multiple influences that organophosphorus pesticides and their degradation products have on environmental ecosystems and to improving pesticide removal processes from water.
T2  - Environmental Science and Pollution Research
T1  - Evaluation of azamethiphos and dimethoate degradation using chlorine dioxide during water treatment
VL  - 27
IS  - 21
SP  - 27147
EP  - 27160
DO  - 10.1007/s11356-020-09069-5
ER  - 

@article{
author = "Pergal, Marija V. and Kodranov, Igor D. and Dojčinović, Biljana P. and Avdin, Viacheslav V. and Stanković, Dalibor M. and Petković, Branka B. and Manojlović, Dragan D.",
year = "2020",
abstract = "Chlorine dioxide (ClO2) degradation of the organophosphorus pesticides azamethiphos (AZA) and dimethoate (DM) (10 mg/L) in deionized water and in Sava River water was investigated for the first time. Pesticide degradation was studied in terms of ClO2 level (5 and 10 mg/L), degradation duration (0.5, 1, 2, 3, 6, and 24 h), pH (3.00, 7.00, and 9.00), and under light/dark conditions in deionized water. Degradation was monitored using high-performance liquid chromatography. Gas chromatography coupled with triple quadrupole mass detector was used to identify degradation products of pesticides. Total organic carbon was measured to determine the extent of mineralization after pesticide degradation. Real river water was used under recommended conditions to study the influence of organic matter on pesticide degradation. High degradation efficiency (88–100% for AZA and 85–98% for DM) was achieved in deionized water under various conditions, proving the flexibility of ClO2 degradation for the examined organophosphorus pesticides. In Sava River water, however, extended treatment duration achieved lower degradation efficiency, so ClO2 oxidized both the pesticides and dissolved organic matter in parallel. After degradation, AZA produced four identified products (6-chlorooxazolo[4,5-b]pyridin-2(3H)-one; O,O,S-trimethyl phosphorothioate; 6-chloro-3-(hydroxymethyl)oxazolo[4,5-b]pyridin-2(3H)-one; O,O-dimethyl S-hydrogen phosphorothioate) and DM produced three (O,O-dimethyl S-(2-(methylamino)-2-oxoethyl) phosphorothioate; e.g., omethoate; S-(2-(methylamino)-2-oxoethyl) O,O-dihydrogen phosphorothioate; O,O,S-trimethyl phosphorodithioate). Simple pesticide degradation mechanisms were deduced. Daphnia magna toxicity tests showed degradation products were less toxic than parent compounds. These results contribute to our understanding of the multiple influences that organophosphorus pesticides and their degradation products have on environmental ecosystems and to improving pesticide removal processes from water.",
journal = "Environmental Science and Pollution Research",
title = "Evaluation of azamethiphos and dimethoate degradation using chlorine dioxide during water treatment",
volume = "27",
number = "21",
pages = "27147-27160",
doi = "10.1007/s11356-020-09069-5"
}

Pergal, M. V., Kodranov, I. D., Dojčinović, B. P., Avdin, V. V., Stanković, D. M., Petković, B. B.,& Manojlović, D. D.. (2020). Evaluation of azamethiphos and dimethoate degradation using chlorine dioxide during water treatment. in Environmental Science and Pollution Research, 27(21), 27147-27160.
https://doi.org/10.1007/s11356-020-09069-5

Pergal MV, Kodranov ID, Dojčinović BP, Avdin VV, Stanković DM, Petković BB, Manojlović DD. Evaluation of azamethiphos and dimethoate degradation using chlorine dioxide during water treatment. in Environmental Science and Pollution Research. 2020;27(21):27147-27160.
doi:10.1007/s11356-020-09069-5 .

Pergal, Marija V., Kodranov, Igor D., Dojčinović, Biljana P., Avdin, Viacheslav V., Stanković, Dalibor M., Petković, Branka B., Manojlović, Dragan D., "Evaluation of azamethiphos and dimethoate degradation using chlorine dioxide during water treatment" in Environmental Science and Pollution Research, 27, no. 21 (2020):27147-27160,
https://doi.org/10.1007/s11356-020-09069-5 . .

TY  - JOUR
AU  - Pergal, Marija V.
AU  - Kodranov, Igor D.
AU  - Pergal, Miodrag M.
AU  - Gašić, Uroš M.
AU  - Stanković, Dalibor M.
AU  - Petković, Branka B.
AU  - Manojlović, Dragan D.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9112
AB  - The aim of this study was to investigate, analyze, and compare applied techniques suitable for achieving efficient removal of organophosphorus pesticides (OPPs) (malathion and fenitrothion) from aqueous solutions and analyze the degradation products and processes. Pesticide degradation efficiency (%) was monitored by high-performance liquid chromatography (HPLC) equipped with a photodiode array detector (DAD), while mineralization degree was determined by total organic carbon analysis (TOC). Daphnia magna was used for screening the environmental safety aspects of the degradation methods, i.e., for assessing the toxicity of solutions obtained after degradation. Additionally, a surface river water was utilized to examine the likely influence of organic matter on the pesticides’ degradation. Pesticide degradation products were identified using gas chromatography with a triple quadrupole mass detector (GC-MS/MS) as well as ultrahigh-performance liquid chromatography coupled with a linear ion trap, Orbitrap mass spectrometer (UHPLC-LTQ Orbitrap MS), and a simple pesticide degradation mechanism is proposed. Removal of pesticides from water using chlorine dioxide was successful, resulting in high degradation efficiency (98% for malathion and 81% for fenitrothion). Partial mineralization was achieved, and Daphnia magna mortality decreased in the waters containing degradation products (compared with the parent pesticides), indicating that the solutions formed were less toxic than the parent pesticides. Lower degradation rates (80% for malathion and 72% for fenitrothion) in Sava River water were measured, indicating the influence of the organic matter contained in this naturally occurring surface water. The results prove that chlorine dioxide could be used as an agent for successful removal of these OPPs from water.
T2  - Water, Air, and Soil Pollution
T1  - Degradation Products, Mineralization, and Toxicity Assessment of Pesticides Malathion and Fenitrothion
VL  - 231
IS  - 8
DO  - 10.1007/s11270-020-04800-x
ER  - 

@article{
author = "Pergal, Marija V. and Kodranov, Igor D. and Pergal, Miodrag M. and Gašić, Uroš M. and Stanković, Dalibor M. and Petković, Branka B. and Manojlović, Dragan D.",
year = "2020",
abstract = "The aim of this study was to investigate, analyze, and compare applied techniques suitable for achieving efficient removal of organophosphorus pesticides (OPPs) (malathion and fenitrothion) from aqueous solutions and analyze the degradation products and processes. Pesticide degradation efficiency (%) was monitored by high-performance liquid chromatography (HPLC) equipped with a photodiode array detector (DAD), while mineralization degree was determined by total organic carbon analysis (TOC). Daphnia magna was used for screening the environmental safety aspects of the degradation methods, i.e., for assessing the toxicity of solutions obtained after degradation. Additionally, a surface river water was utilized to examine the likely influence of organic matter on the pesticides’ degradation. Pesticide degradation products were identified using gas chromatography with a triple quadrupole mass detector (GC-MS/MS) as well as ultrahigh-performance liquid chromatography coupled with a linear ion trap, Orbitrap mass spectrometer (UHPLC-LTQ Orbitrap MS), and a simple pesticide degradation mechanism is proposed. Removal of pesticides from water using chlorine dioxide was successful, resulting in high degradation efficiency (98% for malathion and 81% for fenitrothion). Partial mineralization was achieved, and Daphnia magna mortality decreased in the waters containing degradation products (compared with the parent pesticides), indicating that the solutions formed were less toxic than the parent pesticides. Lower degradation rates (80% for malathion and 72% for fenitrothion) in Sava River water were measured, indicating the influence of the organic matter contained in this naturally occurring surface water. The results prove that chlorine dioxide could be used as an agent for successful removal of these OPPs from water.",
journal = "Water, Air, and Soil Pollution",
title = "Degradation Products, Mineralization, and Toxicity Assessment of Pesticides Malathion and Fenitrothion",
volume = "231",
number = "8",
doi = "10.1007/s11270-020-04800-x"
}

Pergal, M. V., Kodranov, I. D., Pergal, M. M., Gašić, U. M., Stanković, D. M., Petković, B. B.,& Manojlović, D. D.. (2020). Degradation Products, Mineralization, and Toxicity Assessment of Pesticides Malathion and Fenitrothion. in Water, Air, and Soil Pollution, 231(8).
https://doi.org/10.1007/s11270-020-04800-x

Pergal MV, Kodranov ID, Pergal MM, Gašić UM, Stanković DM, Petković BB, Manojlović DD. Degradation Products, Mineralization, and Toxicity Assessment of Pesticides Malathion and Fenitrothion. in Water, Air, and Soil Pollution. 2020;231(8).
doi:10.1007/s11270-020-04800-x .

Pergal, Marija V., Kodranov, Igor D., Pergal, Miodrag M., Gašić, Uroš M., Stanković, Dalibor M., Petković, Branka B., Manojlović, Dragan D., "Degradation Products, Mineralization, and Toxicity Assessment of Pesticides Malathion and Fenitrothion" in Water, Air, and Soil Pollution, 231, no. 8 (2020),
https://doi.org/10.1007/s11270-020-04800-x . .

TY  - JOUR
AU  - Jevtić, Sonja
AU  - Stefanović, Anđela
AU  - Stanković, Dalibor M.
AU  - Pergal, Marija V.
AU  - Ivanović, Aleksandra T.
AU  - Jokić, Anja
AU  - Petković, Branka B.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7589
AB  - Bentazone (BZ) is selective contact-past herbicide with suspected reproductive toxicity potential for human due to possible contamination of ground and surface waters. This work presents simple, rapid, sensitive and accurate determination of bentazone at unmodified boron-doped diamond electrode, using differential pulse voltammetry in Britton-Robinson buffer (pH 4, oxidation peak at 1.0 V). Under optimized DPV conditions linear calibration curve was obtained for range of 2 to 100 mu M, with a detection limit of 0.5 mu M. The effect of possible interfering agents is negligible, confirming good selectivity of the method. The method was successfully applied to determination of bentazone in spiked river water samples. This electrochemical determination of bentazone represents a favorable alternative to other used time-consuming and expensive analytical techniques and procedures.
T2  - Diamond and Related Materials
T1  - Boron-doped diamond electrode - A prestigious unmodified carbon electrode for simple and fast determination of bentazone in river water samples
VL  - 81
SP  - 133
EP  - 137
DO  - 10.1016/j.diamond.2017.12.009
ER  - 

@article{
author = "Jevtić, Sonja and Stefanović, Anđela and Stanković, Dalibor M. and Pergal, Marija V. and Ivanović, Aleksandra T. and Jokić, Anja and Petković, Branka B.",
year = "2018",
abstract = "Bentazone (BZ) is selective contact-past herbicide with suspected reproductive toxicity potential for human due to possible contamination of ground and surface waters. This work presents simple, rapid, sensitive and accurate determination of bentazone at unmodified boron-doped diamond electrode, using differential pulse voltammetry in Britton-Robinson buffer (pH 4, oxidation peak at 1.0 V). Under optimized DPV conditions linear calibration curve was obtained for range of 2 to 100 mu M, with a detection limit of 0.5 mu M. The effect of possible interfering agents is negligible, confirming good selectivity of the method. The method was successfully applied to determination of bentazone in spiked river water samples. This electrochemical determination of bentazone represents a favorable alternative to other used time-consuming and expensive analytical techniques and procedures.",
journal = "Diamond and Related Materials",
title = "Boron-doped diamond electrode - A prestigious unmodified carbon electrode for simple and fast determination of bentazone in river water samples",
volume = "81",
pages = "133-137",
doi = "10.1016/j.diamond.2017.12.009"
}

Jevtić, S., Stefanović, A., Stanković, D. M., Pergal, M. V., Ivanović, A. T., Jokić, A.,& Petković, B. B.. (2018). Boron-doped diamond electrode - A prestigious unmodified carbon electrode for simple and fast determination of bentazone in river water samples. in Diamond and Related Materials, 81, 133-137.
https://doi.org/10.1016/j.diamond.2017.12.009

Jevtić S, Stefanović A, Stanković DM, Pergal MV, Ivanović AT, Jokić A, Petković BB. Boron-doped diamond electrode - A prestigious unmodified carbon electrode for simple and fast determination of bentazone in river water samples. in Diamond and Related Materials. 2018;81:133-137.
doi:10.1016/j.diamond.2017.12.009 .

Jevtić, Sonja, Stefanović, Anđela, Stanković, Dalibor M., Pergal, Marija V., Ivanović, Aleksandra T., Jokić, Anja, Petković, Branka B., "Boron-doped diamond electrode - A prestigious unmodified carbon electrode for simple and fast determination of bentazone in river water samples" in Diamond and Related Materials, 81 (2018):133-137,
https://doi.org/10.1016/j.diamond.2017.12.009 . .

TY  - JOUR
AU  - Petronijević, Ivan M.
AU  - Cerović, Dragana D.
AU  - Dudić, Duško
AU  - Dojčilović, Jablan R.
AU  - Dojčinović, Biljana P.
AU  - Pergal, Marija V.
PY  - 2018
UR  - http://doi.wiley.com/10.1002/pat.4289
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7708
AB  - In this paper, a new simple and environmentally friendly treatment technique for obtaining polymer nanocomposites with appropriate dielectric properties has been presented. Sheets of isotactic polypropylene and atactic polystyrene were immersed in 3 saturated water solutions of alkali metal salts (LiCl, NaCl, and KCl) at 2 fixed temperatures (23°C and 90°C), and 3 DC electrical potentials (+4 kV, −4 kV, and ground potential) were applied. A quantification of alkali metals in the polymer sheets was conducted by inductively coupled plasma optic emission spectrometry. The obtained concentration values were from 7.38·10−9 mol/cm3to 1.25·10−7 mol/cm3. The qualitative analysis of potassium distribution in the polymer matrix was conducted by time-of-flight secondary ion mass spectrometry cross-sectional record. The relative dielectric constant (ε′) of samples was investigated in the frequency range from 20 Hz to 9 MHz at the constant temperature of 22°C. Stable values of ε′ in fully measured frequency range were observed for both pure and treated samples. Next, the results of the dielectric spectroscopy measurements were compared and established the kind of treatment that provided the highest value of ε′. The relationship between the concentrations of alkali metals and the values of relative dielectric constant was determined for the samples obtained by a treatment at 90°C and +4 kV.
T2  - Polymers for Advanced Technologies
T1  - Dielectric spectroscopy of nanocomposites based on iPP and aPS treated in the water solutions of alkali metal salts
VL  - 29
IS  - 6
SP  - 1826
EP  - 1833
DO  - 10.1002/pat.4289
ER  - 

@article{
author = "Petronijević, Ivan M. and Cerović, Dragana D. and Dudić, Duško and Dojčilović, Jablan R. and Dojčinović, Biljana P. and Pergal, Marija V.",
year = "2018",
abstract = "In this paper, a new simple and environmentally friendly treatment technique for obtaining polymer nanocomposites with appropriate dielectric properties has been presented. Sheets of isotactic polypropylene and atactic polystyrene were immersed in 3 saturated water solutions of alkali metal salts (LiCl, NaCl, and KCl) at 2 fixed temperatures (23°C and 90°C), and 3 DC electrical potentials (+4 kV, −4 kV, and ground potential) were applied. A quantification of alkali metals in the polymer sheets was conducted by inductively coupled plasma optic emission spectrometry. The obtained concentration values were from 7.38·10−9 mol/cm3to 1.25·10−7 mol/cm3. The qualitative analysis of potassium distribution in the polymer matrix was conducted by time-of-flight secondary ion mass spectrometry cross-sectional record. The relative dielectric constant (ε′) of samples was investigated in the frequency range from 20 Hz to 9 MHz at the constant temperature of 22°C. Stable values of ε′ in fully measured frequency range were observed for both pure and treated samples. Next, the results of the dielectric spectroscopy measurements were compared and established the kind of treatment that provided the highest value of ε′. The relationship between the concentrations of alkali metals and the values of relative dielectric constant was determined for the samples obtained by a treatment at 90°C and +4 kV.",
journal = "Polymers for Advanced Technologies",
title = "Dielectric spectroscopy of nanocomposites based on iPP and aPS treated in the water solutions of alkali metal salts",
volume = "29",
number = "6",
pages = "1826-1833",
doi = "10.1002/pat.4289"
}

Petronijević, I. M., Cerović, D. D., Dudić, D., Dojčilović, J. R., Dojčinović, B. P.,& Pergal, M. V.. (2018). Dielectric spectroscopy of nanocomposites based on iPP and aPS treated in the water solutions of alkali metal salts. in Polymers for Advanced Technologies, 29(6), 1826-1833.
https://doi.org/10.1002/pat.4289

Petronijević IM, Cerović DD, Dudić D, Dojčilović JR, Dojčinović BP, Pergal MV. Dielectric spectroscopy of nanocomposites based on iPP and aPS treated in the water solutions of alkali metal salts. in Polymers for Advanced Technologies. 2018;29(6):1826-1833.
doi:10.1002/pat.4289 .

Petronijević, Ivan M., Cerović, Dragana D., Dudić, Duško, Dojčilović, Jablan R., Dojčinović, Biljana P., Pergal, Marija V., "Dielectric spectroscopy of nanocomposites based on iPP and aPS treated in the water solutions of alkali metal salts" in Polymers for Advanced Technologies, 29, no. 6 (2018):1826-1833,
https://doi.org/10.1002/pat.4289 . .

TY  - JOUR
AU  - Pergal, Marija V.
AU  - Kodranov, Igor D.
AU  - Pergal, Miodrag M.
AU  - Dojčinović, Biljana P.
AU  - Stanković, Dalibor M.
AU  - Petković, Branka B.
AU  - Manojlović, Dragan D.
PY  - 2018
UR  - http://link.springer.com/10.1007/s11270-018-3947-2
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7847
AB  - The degradation of two sulfonylurea herbicides, nicosulfuron and thifensulfuron methyl in water by chlorine dioxide, was studied for the first time in this paper. In order to examine the optimal parameters for degradation of both herbicides, degradation was investigated under light or dark conditions with different amount of chlorine dioxide, different degradation periods, and at different pH values. Degradation efficiency of herbicides was monitored using high-performance liquid chromatography with photodiode array detection (HPLC-DAD). The degradation products were analyzed by gas chromatography with triple quadrupole mass detector (GC–QQQ). Three products were identified after degradation of nicosulfuron and two products after degradation of thifensulfuron methyl. Total organic analysis (TOC) gave insight into some differences in degradation mechanisms and degrees of mineralization after degradation of the herbicides using chlorine dioxide. A simple mechanism of herbicide degradation was proposed. Acute toxicity tests were performed on the products produced after degradation with chlorine dioxide, and the results showed that the degradation products were less toxic than the parent compounds. The findings of the present study are very useful for the treatment of wastewaters contaminated with herbicides. © 2018, Springer Nature Switzerland AG.
T2  - Water, Air, and Soil Pollution
T1  - Assessment of Degradation of Sulfonylurea Herbicides in Water by Chlorine Dioxide
VL  - 229
IS  - 9
SP  - 287
DO  - 10.1007/s11270-018-3947-2
ER  - 

@article{
author = "Pergal, Marija V. and Kodranov, Igor D. and Pergal, Miodrag M. and Dojčinović, Biljana P. and Stanković, Dalibor M. and Petković, Branka B. and Manojlović, Dragan D.",
year = "2018",
abstract = "The degradation of two sulfonylurea herbicides, nicosulfuron and thifensulfuron methyl in water by chlorine dioxide, was studied for the first time in this paper. In order to examine the optimal parameters for degradation of both herbicides, degradation was investigated under light or dark conditions with different amount of chlorine dioxide, different degradation periods, and at different pH values. Degradation efficiency of herbicides was monitored using high-performance liquid chromatography with photodiode array detection (HPLC-DAD). The degradation products were analyzed by gas chromatography with triple quadrupole mass detector (GC–QQQ). Three products were identified after degradation of nicosulfuron and two products after degradation of thifensulfuron methyl. Total organic analysis (TOC) gave insight into some differences in degradation mechanisms and degrees of mineralization after degradation of the herbicides using chlorine dioxide. A simple mechanism of herbicide degradation was proposed. Acute toxicity tests were performed on the products produced after degradation with chlorine dioxide, and the results showed that the degradation products were less toxic than the parent compounds. The findings of the present study are very useful for the treatment of wastewaters contaminated with herbicides. © 2018, Springer Nature Switzerland AG.",
journal = "Water, Air, and Soil Pollution",
title = "Assessment of Degradation of Sulfonylurea Herbicides in Water by Chlorine Dioxide",
volume = "229",
number = "9",
pages = "287",
doi = "10.1007/s11270-018-3947-2"
}

Pergal, M. V., Kodranov, I. D., Pergal, M. M., Dojčinović, B. P., Stanković, D. M., Petković, B. B.,& Manojlović, D. D.. (2018). Assessment of Degradation of Sulfonylurea Herbicides in Water by Chlorine Dioxide. in Water, Air, and Soil Pollution, 229(9), 287.
https://doi.org/10.1007/s11270-018-3947-2

Pergal MV, Kodranov ID, Pergal MM, Dojčinović BP, Stanković DM, Petković BB, Manojlović DD. Assessment of Degradation of Sulfonylurea Herbicides in Water by Chlorine Dioxide. in Water, Air, and Soil Pollution. 2018;229(9):287.
doi:10.1007/s11270-018-3947-2 .

Pergal, Marija V., Kodranov, Igor D., Pergal, Miodrag M., Dojčinović, Biljana P., Stanković, Dalibor M., Petković, Branka B., Manojlović, Dragan D., "Assessment of Degradation of Sulfonylurea Herbicides in Water by Chlorine Dioxide" in Water, Air, and Soil Pollution, 229, no. 9 (2018):287,
https://doi.org/10.1007/s11270-018-3947-2 . .

TY  - JOUR
AU  - Pergal, Marija V.
AU  - Kodranov, Igor D.
AU  - Pergal, Miodrag M.
AU  - Dojčinović, Biljana P.
AU  - Stanković, Dalibor M.
AU  - Petković, Branka B.
AU  - Manojlović, Dragan D.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7849
AB  - During typesetting, the image of figure 4 was also used in figure 5. The mistake was discovered after the original article was published online.
The original article was updated by correcting figure 5.
T2  - Water, Air, and Soil Pollution
T1  - Correction to: Assessment of Degradation of Sulfonylurea Herbicides in Water by Chlorine Dioxide
VL  - 229
IS  - 9
DO  - 10.1007/s11270-018-3967-y
ER  - 

@article{
author = "Pergal, Marija V. and Kodranov, Igor D. and Pergal, Miodrag M. and Dojčinović, Biljana P. and Stanković, Dalibor M. and Petković, Branka B. and Manojlović, Dragan D.",
year = "2018",
abstract = "During typesetting, the image of figure 4 was also used in figure 5. The mistake was discovered after the original article was published online.
The original article was updated by correcting figure 5.",
journal = "Water, Air, and Soil Pollution",
title = "Correction to: Assessment of Degradation of Sulfonylurea Herbicides in Water by Chlorine Dioxide",
volume = "229",
number = "9",
doi = "10.1007/s11270-018-3967-y"
}

Pergal, M. V., Kodranov, I. D., Pergal, M. M., Dojčinović, B. P., Stanković, D. M., Petković, B. B.,& Manojlović, D. D.. (2018). Correction to: Assessment of Degradation of Sulfonylurea Herbicides in Water by Chlorine Dioxide. in Water, Air, and Soil Pollution, 229(9).
https://doi.org/10.1007/s11270-018-3967-y

Pergal MV, Kodranov ID, Pergal MM, Dojčinović BP, Stanković DM, Petković BB, Manojlović DD. Correction to: Assessment of Degradation of Sulfonylurea Herbicides in Water by Chlorine Dioxide. in Water, Air, and Soil Pollution. 2018;229(9).
doi:10.1007/s11270-018-3967-y .

Pergal, Marija V., Kodranov, Igor D., Pergal, Miodrag M., Dojčinović, Biljana P., Stanković, Dalibor M., Petković, Branka B., Manojlović, Dragan D., "Correction to: Assessment of Degradation of Sulfonylurea Herbicides in Water by Chlorine Dioxide" in Water, Air, and Soil Pollution, 229, no. 9 (2018),
https://doi.org/10.1007/s11270-018-3967-y . .

TY  - JOUR
AU  - Jevtić, Sonja
AU  - Vukojević, Vesna
AU  - Đurđić, Slađana
AU  - Pergal, Marija V.
AU  - Manojlović, Dragan D.
AU  - Petković, Branka B.
AU  - Stanković, Dalibor M.
PY  - 2018
UR  - http://linkinghub.elsevier.com/retrieve/pii/S0013468618310089
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7689
AB  - This work present a new approach for the detection of relatively new herbicide pethoxamid (POA), a first electrochemical behavior and determination based on its oxidation on boron-doped diamond electrode in Britton-Robinson buffer solution at pH 4. Square wave voltammetric technique was used for quantification of POA at anodic potential of 1.35 V vs reference Ag/AgCl electrode. The proposed electroanalytical method is operational in the linear working range from 3 to 100 μM of POA with a limit of detection of 1.37 μM. The developed analytical procedure was successfully tested for determination of this herbicide in standard/spiked river water samples and commercial herbicide Successor T SE/spiked river water samples, offering a simple, fast and inexpensive alternative way of pesticide determining to chromatographic methods employed for this purpose.
T2  - Electrochimica Acta
T1  - First electrochemistry of herbicide pethoxamid and its quantification using electroanalytical approach from mixed commercial product
VL  - 277
SP  - 136
EP  - 142
DO  - 10.1016/j.electacta.2018.05.004
ER  - 

@article{
author = "Jevtić, Sonja and Vukojević, Vesna and Đurđić, Slađana and Pergal, Marija V. and Manojlović, Dragan D. and Petković, Branka B. and Stanković, Dalibor M.",
year = "2018",
abstract = "This work present a new approach for the detection of relatively new herbicide pethoxamid (POA), a first electrochemical behavior and determination based on its oxidation on boron-doped diamond electrode in Britton-Robinson buffer solution at pH 4. Square wave voltammetric technique was used for quantification of POA at anodic potential of 1.35 V vs reference Ag/AgCl electrode. The proposed electroanalytical method is operational in the linear working range from 3 to 100 μM of POA with a limit of detection of 1.37 μM. The developed analytical procedure was successfully tested for determination of this herbicide in standard/spiked river water samples and commercial herbicide Successor T SE/spiked river water samples, offering a simple, fast and inexpensive alternative way of pesticide determining to chromatographic methods employed for this purpose.",
journal = "Electrochimica Acta",
title = "First electrochemistry of herbicide pethoxamid and its quantification using electroanalytical approach from mixed commercial product",
volume = "277",
pages = "136-142",
doi = "10.1016/j.electacta.2018.05.004"
}

Jevtić, S., Vukojević, V., Đurđić, S., Pergal, M. V., Manojlović, D. D., Petković, B. B.,& Stanković, D. M.. (2018). First electrochemistry of herbicide pethoxamid and its quantification using electroanalytical approach from mixed commercial product. in Electrochimica Acta, 277, 136-142.
https://doi.org/10.1016/j.electacta.2018.05.004

Jevtić S, Vukojević V, Đurđić S, Pergal MV, Manojlović DD, Petković BB, Stanković DM. First electrochemistry of herbicide pethoxamid and its quantification using electroanalytical approach from mixed commercial product. in Electrochimica Acta. 2018;277:136-142.
doi:10.1016/j.electacta.2018.05.004 .

Jevtić, Sonja, Vukojević, Vesna, Đurđić, Slađana, Pergal, Marija V., Manojlović, Dragan D., Petković, Branka B., Stanković, Dalibor M., "First electrochemistry of herbicide pethoxamid and its quantification using electroanalytical approach from mixed commercial product" in Electrochimica Acta, 277 (2018):136-142,
https://doi.org/10.1016/j.electacta.2018.05.004 . .

TY  - JOUR
AU  - Đurđić, Slađana
AU  - Vukojević, Vesna
AU  - Jevtić, Sonja
AU  - Pergal, Marija V.
AU  - Petković, Branka B.
AU  - Stanković, Dalibor M.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7661
AB  - In this work, for the first time we proposed electrochemical behavior and development of an analytical procedure for quantification of pesticide clomazone. Electrochemical behavior of clomazone's at boron-doped diamond electrode is characterized with irreversible oxidation at potential of around 1.6 V, in Britton-Robinson buffer solution at pH 2. It was found that potential of this oxidation was not pH dependent excluding presence of proton in the electrochemical reaction. Square wave voltammetry method was the most appropriate for clomazone quantification and proposed procedure was successfully applied for determination of clomazone in river water samples. Obtained parameters, detection limit of 0.21 mu M and working linear range from 1 to 100 mu M and satisfied selectivity can indicate that presented results open new field in research of this group of pesticides and offer possible replacement to the sophisticated and expensive chromatographic methods.
T2  - International Journal of Electrochemical Science
T1  - Herbicide clomazone detection using electroanalytical approach using boron doped diamond electrode
VL  - 13
IS  - 3
SP  - 2791
EP  - 2799
DO  - 10.20964/2018.03.39
ER  - 

@article{
author = "Đurđić, Slađana and Vukojević, Vesna and Jevtić, Sonja and Pergal, Marija V. and Petković, Branka B. and Stanković, Dalibor M.",
year = "2018",
abstract = "In this work, for the first time we proposed electrochemical behavior and development of an analytical procedure for quantification of pesticide clomazone. Electrochemical behavior of clomazone's at boron-doped diamond electrode is characterized with irreversible oxidation at potential of around 1.6 V, in Britton-Robinson buffer solution at pH 2. It was found that potential of this oxidation was not pH dependent excluding presence of proton in the electrochemical reaction. Square wave voltammetry method was the most appropriate for clomazone quantification and proposed procedure was successfully applied for determination of clomazone in river water samples. Obtained parameters, detection limit of 0.21 mu M and working linear range from 1 to 100 mu M and satisfied selectivity can indicate that presented results open new field in research of this group of pesticides and offer possible replacement to the sophisticated and expensive chromatographic methods.",
journal = "International Journal of Electrochemical Science",
title = "Herbicide clomazone detection using electroanalytical approach using boron doped diamond electrode",
volume = "13",
number = "3",
pages = "2791-2799",
doi = "10.20964/2018.03.39"
}

Đurđić, S., Vukojević, V., Jevtić, S., Pergal, M. V., Petković, B. B.,& Stanković, D. M.. (2018). Herbicide clomazone detection using electroanalytical approach using boron doped diamond electrode. in International Journal of Electrochemical Science, 13(3), 2791-2799.
https://doi.org/10.20964/2018.03.39

Đurđić S, Vukojević V, Jevtić S, Pergal MV, Petković BB, Stanković DM. Herbicide clomazone detection using electroanalytical approach using boron doped diamond electrode. in International Journal of Electrochemical Science. 2018;13(3):2791-2799.
doi:10.20964/2018.03.39 .

Đurđić, Slađana, Vukojević, Vesna, Jevtić, Sonja, Pergal, Marija V., Petković, Branka B., Stanković, Dalibor M., "Herbicide clomazone detection using electroanalytical approach using boron doped diamond electrode" in International Journal of Electrochemical Science, 13, no. 3 (2018):2791-2799,
https://doi.org/10.20964/2018.03.39 . .

TY  - JOUR
AU  - Vukojević, Vesna
AU  - Djurdjić, Sladjana
AU  - Jevtić, Sonja
AU  - Pergal, Marija V.
AU  - Marković, Aleksandar
AU  - Mutić, Jelena J.
AU  - Petković, Branka B.
AU  - Stanković, Dalibor M.
PY  - 2018
UR  - https://www.tandfonline.com/doi/full/10.1080/03067319.2018.1537394
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7966
AB  - In this work, the electrochemical behaviour and the subsequent development of an analytical procedure for quantification of pesticide azamethiphos, using boron-doped diamond (BDD) electrode are reported for the first time. It was found that azamethiphos electrochemical behaviour is irreversible oxidation at the potential of around 1.70 V, in 1 M nitric acid (pH 0). Also, it was found that potential of this oxidation was not pH dependent which can be attributed to the no proton involvement in electrochemical reaction on the electrode surface. The square wave voltammetric method was most appropriate for azamethiphos quantification. Under optimised experimental conditions, linear working range from 2 to 100 µM was estimated with the detection limit of 0.45 µM. Negligible effect of the possible interfering compound was observed. The obtained results show that the developed analytical methodology can be an adequate replacement for the, up to date, used methods for detection of organophosphorous pesticide. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.
T2  - International Journal of Environmental Analytical Chemistry
T1  - First electrochemical investigation of organophosphorus pesticide azametiphos and its quantification using electroanalytical approach
VL  - 98
IS  - 13
SP  - 1175
EP  - 1185
DO  - 10.1080/03067319.2018.1537394
ER  - 

@article{
author = "Vukojević, Vesna and Djurdjić, Sladjana and Jevtić, Sonja and Pergal, Marija V. and Marković, Aleksandar and Mutić, Jelena J. and Petković, Branka B. and Stanković, Dalibor M.",
year = "2018",
abstract = "In this work, the electrochemical behaviour and the subsequent development of an analytical procedure for quantification of pesticide azamethiphos, using boron-doped diamond (BDD) electrode are reported for the first time. It was found that azamethiphos electrochemical behaviour is irreversible oxidation at the potential of around 1.70 V, in 1 M nitric acid (pH 0). Also, it was found that potential of this oxidation was not pH dependent which can be attributed to the no proton involvement in electrochemical reaction on the electrode surface. The square wave voltammetric method was most appropriate for azamethiphos quantification. Under optimised experimental conditions, linear working range from 2 to 100 µM was estimated with the detection limit of 0.45 µM. Negligible effect of the possible interfering compound was observed. The obtained results show that the developed analytical methodology can be an adequate replacement for the, up to date, used methods for detection of organophosphorous pesticide. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.",
journal = "International Journal of Environmental Analytical Chemistry",
title = "First electrochemical investigation of organophosphorus pesticide azametiphos and its quantification using electroanalytical approach",
volume = "98",
number = "13",
pages = "1175-1185",
doi = "10.1080/03067319.2018.1537394"
}

Vukojević, V., Djurdjić, S., Jevtić, S., Pergal, M. V., Marković, A., Mutić, J. J., Petković, B. B.,& Stanković, D. M.. (2018). First electrochemical investigation of organophosphorus pesticide azametiphos and its quantification using electroanalytical approach. in International Journal of Environmental Analytical Chemistry, 98(13), 1175-1185.
https://doi.org/10.1080/03067319.2018.1537394

Vukojević V, Djurdjić S, Jevtić S, Pergal MV, Marković A, Mutić JJ, Petković BB, Stanković DM. First electrochemical investigation of organophosphorus pesticide azametiphos and its quantification using electroanalytical approach. in International Journal of Environmental Analytical Chemistry. 2018;98(13):1175-1185.
doi:10.1080/03067319.2018.1537394 .

Vukojević, Vesna, Djurdjić, Sladjana, Jevtić, Sonja, Pergal, Marija V., Marković, Aleksandar, Mutić, Jelena J., Petković, Branka B., Stanković, Dalibor M., "First electrochemical investigation of organophosphorus pesticide azametiphos and its quantification using electroanalytical approach" in International Journal of Environmental Analytical Chemistry, 98, no. 13 (2018):1175-1185,
https://doi.org/10.1080/03067319.2018.1537394 . .

TY  - JOUR
AU  - Marković, Bojana M.
AU  - Stefanovic, Ivan S.
AU  - Hercigonja, Radmila V.
AU  - Pergal, Marija V.
AU  - Marković, Jelena P.
AU  - Onjia, Antonije E.
AU  - Nastasović, Aleksandra B.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1501
AB  - Macroporous copolymers of poly[(glycidyl methacrylate)-co-(ethylene glycol dimethacrylate)] (PGME) with various crosslinker (ethylene glycol dimethacrylate) concentrations and porosity parameters and additionally functionalized with hexamethylene diamine (PGME-HD) were tested as potential Cr(VI) oxyanion sorbents from aqueous solutions. Kinetics of Cr(VI) sorption was investigated in the temperature range 298-343 K and the results were fitted to chemical reaction and particle diffusion models. The Cr(VI) sorption obeys the pseudo-second-order model with definite influence of pore diffusion. A temperature rise promotes chromium removal, with a maximum experimental uptake capacity of 4.21 mmol g(-1) at 343 K for the sample with the highest amino group concentration. Equilibrium data were analysed with Langmuir, Freundlich and Temkin adsorption isotherm models. Thermodynamic parameters, i.e. Gibbs free energy (G(0)), enthalpy (H-0) and entropy change (S-0) and activation energy of sorption (E-a), were calculated. The Cr(VI) adsorption onto PGME-HD was found to be spontaneous and endothermic, with increased randomness in the system. Desorption experiments show that chromium anion sorption was reversible and the PGME-HD sample GMA 60 HD was easily regenerated with 0.1 mol L-1 NaOH up to 90% recovery in the fourth sorption/desorption cycle. In the fifth cycle, a substantial sorption loss of 37% was observed. (c) 2016 Society of Chemical Industry
T2  - Polymer International
T1  - Novel hexamethylene diamine-functionalized macroporous copolymer for chromium removal from aqueous solutions
VL  - 66
IS  - 5
SP  - 679
EP  - 689
DO  - 10.1002/pi.5306
ER  - 

@article{
author = "Marković, Bojana M. and Stefanovic, Ivan S. and Hercigonja, Radmila V. and Pergal, Marija V. and Marković, Jelena P. and Onjia, Antonije E. and Nastasović, Aleksandra B.",
year = "2017",
abstract = "Macroporous copolymers of poly[(glycidyl methacrylate)-co-(ethylene glycol dimethacrylate)] (PGME) with various crosslinker (ethylene glycol dimethacrylate) concentrations and porosity parameters and additionally functionalized with hexamethylene diamine (PGME-HD) were tested as potential Cr(VI) oxyanion sorbents from aqueous solutions. Kinetics of Cr(VI) sorption was investigated in the temperature range 298-343 K and the results were fitted to chemical reaction and particle diffusion models. The Cr(VI) sorption obeys the pseudo-second-order model with definite influence of pore diffusion. A temperature rise promotes chromium removal, with a maximum experimental uptake capacity of 4.21 mmol g(-1) at 343 K for the sample with the highest amino group concentration. Equilibrium data were analysed with Langmuir, Freundlich and Temkin adsorption isotherm models. Thermodynamic parameters, i.e. Gibbs free energy (G(0)), enthalpy (H-0) and entropy change (S-0) and activation energy of sorption (E-a), were calculated. The Cr(VI) adsorption onto PGME-HD was found to be spontaneous and endothermic, with increased randomness in the system. Desorption experiments show that chromium anion sorption was reversible and the PGME-HD sample GMA 60 HD was easily regenerated with 0.1 mol L-1 NaOH up to 90% recovery in the fourth sorption/desorption cycle. In the fifth cycle, a substantial sorption loss of 37% was observed. (c) 2016 Society of Chemical Industry",
journal = "Polymer International",
title = "Novel hexamethylene diamine-functionalized macroporous copolymer for chromium removal from aqueous solutions",
volume = "66",
number = "5",
pages = "679-689",
doi = "10.1002/pi.5306"
}

Marković, B. M., Stefanovic, I. S., Hercigonja, R. V., Pergal, M. V., Marković, J. P., Onjia, A. E.,& Nastasović, A. B.. (2017). Novel hexamethylene diamine-functionalized macroporous copolymer for chromium removal from aqueous solutions. in Polymer International, 66(5), 679-689.
https://doi.org/10.1002/pi.5306

Marković BM, Stefanovic IS, Hercigonja RV, Pergal MV, Marković JP, Onjia AE, Nastasović AB. Novel hexamethylene diamine-functionalized macroporous copolymer for chromium removal from aqueous solutions. in Polymer International. 2017;66(5):679-689.
doi:10.1002/pi.5306 .

Marković, Bojana M., Stefanovic, Ivan S., Hercigonja, Radmila V., Pergal, Marija V., Marković, Jelena P., Onjia, Antonije E., Nastasović, Aleksandra B., "Novel hexamethylene diamine-functionalized macroporous copolymer for chromium removal from aqueous solutions" in Polymer International, 66, no. 5 (2017):679-689,
https://doi.org/10.1002/pi.5306 . .

TY  - JOUR
AU  - Stefanovic, Ivan S.
AU  - Ekmescic, Bojana M.
AU  - Maksin, Danijela D.
AU  - Nastasović, Aleksandra B.
AU  - Miladinovic, Zoran P.
AU  - Vuković, Zorica M.
AU  - Micić, Darko M.
AU  - Pergal, Marija V.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/667
AB  - Novel macroporous functionalized copolymers with different cross-linker concentrations and porosity parameters were synthesized by reaction of the pendant epoxy groups of poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate) (poly(GMA-co-EGDMA)) with hexamethylene diamine 1,3-bis(3-aminopropyl)tetramethyldisiloxane, and alpha,omega-diaminopropyl poly(dimethylsiloxane). The copolymers were prepared in forms, of spherical beads and characterized by Fourier transform infrared (FTIR); C-13 and Si-29 solid-state NMR, mercury porosimetry, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). Copolymers prepared with the higher cross-linker concentrations have better thermal stability, higher glass transition temperatures; higher specific surface areas, and smaller pore diameters that correspond to half Of the pore volumes. Out results show that functionalization significantly changed porosity parameters, mechanism of thermal degradation; and increased thermal, stability in comparison with the initial copolymers. These macroporous copolymers could potentially have many applications, i.e. for sorption of heavy and precious metals or as Material for gas chromatography columns.
T2  - Industrial and Engineering Chemistry Research
T1  - Structure, Thermal, and Morphological Properties of Novel Macroporous Amino-Functionalized Glycidyl Methacrylate Based Copolymers
VL  - 54
IS  - 27
SP  - 6902
EP  - 6911
DO  - 10.1021/acs.iecr.5b01285
ER  - 

@article{
author = "Stefanovic, Ivan S. and Ekmescic, Bojana M. and Maksin, Danijela D. and Nastasović, Aleksandra B. and Miladinovic, Zoran P. and Vuković, Zorica M. and Micić, Darko M. and Pergal, Marija V.",
year = "2015",
abstract = "Novel macroporous functionalized copolymers with different cross-linker concentrations and porosity parameters were synthesized by reaction of the pendant epoxy groups of poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate) (poly(GMA-co-EGDMA)) with hexamethylene diamine 1,3-bis(3-aminopropyl)tetramethyldisiloxane, and alpha,omega-diaminopropyl poly(dimethylsiloxane). The copolymers were prepared in forms, of spherical beads and characterized by Fourier transform infrared (FTIR); C-13 and Si-29 solid-state NMR, mercury porosimetry, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). Copolymers prepared with the higher cross-linker concentrations have better thermal stability, higher glass transition temperatures; higher specific surface areas, and smaller pore diameters that correspond to half Of the pore volumes. Out results show that functionalization significantly changed porosity parameters, mechanism of thermal degradation; and increased thermal, stability in comparison with the initial copolymers. These macroporous copolymers could potentially have many applications, i.e. for sorption of heavy and precious metals or as Material for gas chromatography columns.",
journal = "Industrial and Engineering Chemistry Research",
title = "Structure, Thermal, and Morphological Properties of Novel Macroporous Amino-Functionalized Glycidyl Methacrylate Based Copolymers",
volume = "54",
number = "27",
pages = "6902-6911",
doi = "10.1021/acs.iecr.5b01285"
}

Stefanovic, I. S., Ekmescic, B. M., Maksin, D. D., Nastasović, A. B., Miladinovic, Z. P., Vuković, Z. M., Micić, D. M.,& Pergal, M. V.. (2015). Structure, Thermal, and Morphological Properties of Novel Macroporous Amino-Functionalized Glycidyl Methacrylate Based Copolymers. in Industrial and Engineering Chemistry Research, 54(27), 6902-6911.
https://doi.org/10.1021/acs.iecr.5b01285

Stefanovic IS, Ekmescic BM, Maksin DD, Nastasović AB, Miladinovic ZP, Vuković ZM, Micić DM, Pergal MV. Structure, Thermal, and Morphological Properties of Novel Macroporous Amino-Functionalized Glycidyl Methacrylate Based Copolymers. in Industrial and Engineering Chemistry Research. 2015;54(27):6902-6911.
doi:10.1021/acs.iecr.5b01285 .

Stefanovic, Ivan S., Ekmescic, Bojana M., Maksin, Danijela D., Nastasović, Aleksandra B., Miladinovic, Zoran P., Vuković, Zorica M., Micić, Darko M., Pergal, Marija V., "Structure, Thermal, and Morphological Properties of Novel Macroporous Amino-Functionalized Glycidyl Methacrylate Based Copolymers" in Industrial and Engineering Chemistry Research, 54, no. 27 (2015):6902-6911,
https://doi.org/10.1021/acs.iecr.5b01285 . .

TY  - JOUR
AU  - Pergal, Marija V.
AU  - Džunuzović, Jasna V.
AU  - Poreba, Rafal
AU  - Steinhart, Milos
AU  - Pergal, Miodrag M.
AU  - Vodnik, Vesna
AU  - Spirkova, Milena
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5508
AB  - Novel poly(urethane-ester-siloxane) networks, based on hydroxypropyl terminated poly(dimethylsiloxane) (PDMS), 4,4-methylenediphenyl diisocyanate, and hyperbranched polyesters (HBPs) of the second and third pseudogenerations, were synthesized by two-step polymerization. The effects of the PDMS content and pseudogeneration number of HBPs on the structural, thermomechanical, thermal, and surface properties of polyurethanes were investigated. Thermomechanical and thermal properties of polyurethanes and FTIR, SAXS, and SEM results indicated good microphase separated structure. SAXS data suggested that the difference in the HBP pseudogeneration number affects only the global properties of the structure and is much less pronounced than the dependence on the PDMS content, while local properties depend only on the PDMS content. Surface characterization of samples indicated the slightly amphiphilic nature of polyurethanes. The results revealed that the synthesized polyurethanes have good thermal, thermomechanical, and surface properties, which can be tuned and adjusted for coating application by changing the PDMS content or type of the HBP.
T2  - Industrial and Engineering Chemistry Research
T1  - Structure-Property Correlation Study of Novel Poly(urethane-ester-siloxane) Networks
VL  - 52
IS  - 18
SP  - 6164
EP  - 6176
DO  - 10.1021/ie400467j
ER  - 

@article{
author = "Pergal, Marija V. and Džunuzović, Jasna V. and Poreba, Rafal and Steinhart, Milos and Pergal, Miodrag M. and Vodnik, Vesna and Spirkova, Milena",
year = "2013",
abstract = "Novel poly(urethane-ester-siloxane) networks, based on hydroxypropyl terminated poly(dimethylsiloxane) (PDMS), 4,4-methylenediphenyl diisocyanate, and hyperbranched polyesters (HBPs) of the second and third pseudogenerations, were synthesized by two-step polymerization. The effects of the PDMS content and pseudogeneration number of HBPs on the structural, thermomechanical, thermal, and surface properties of polyurethanes were investigated. Thermomechanical and thermal properties of polyurethanes and FTIR, SAXS, and SEM results indicated good microphase separated structure. SAXS data suggested that the difference in the HBP pseudogeneration number affects only the global properties of the structure and is much less pronounced than the dependence on the PDMS content, while local properties depend only on the PDMS content. Surface characterization of samples indicated the slightly amphiphilic nature of polyurethanes. The results revealed that the synthesized polyurethanes have good thermal, thermomechanical, and surface properties, which can be tuned and adjusted for coating application by changing the PDMS content or type of the HBP.",
journal = "Industrial and Engineering Chemistry Research",
title = "Structure-Property Correlation Study of Novel Poly(urethane-ester-siloxane) Networks",
volume = "52",
number = "18",
pages = "6164-6176",
doi = "10.1021/ie400467j"
}

Pergal, M. V., Džunuzović, J. V., Poreba, R., Steinhart, M., Pergal, M. M., Vodnik, V.,& Spirkova, M.. (2013). Structure-Property Correlation Study of Novel Poly(urethane-ester-siloxane) Networks. in Industrial and Engineering Chemistry Research, 52(18), 6164-6176.
https://doi.org/10.1021/ie400467j

Pergal MV, Džunuzović JV, Poreba R, Steinhart M, Pergal MM, Vodnik V, Spirkova M. Structure-Property Correlation Study of Novel Poly(urethane-ester-siloxane) Networks. in Industrial and Engineering Chemistry Research. 2013;52(18):6164-6176.
doi:10.1021/ie400467j .

Pergal, Marija V., Džunuzović, Jasna V., Poreba, Rafal, Steinhart, Milos, Pergal, Miodrag M., Vodnik, Vesna, Spirkova, Milena, "Structure-Property Correlation Study of Novel Poly(urethane-ester-siloxane) Networks" in Industrial and Engineering Chemistry Research, 52, no. 18 (2013):6164-6176,
https://doi.org/10.1021/ie400467j . .

TY  - CONF
AU  - Džunuzović, Jasna V.
AU  - Pergal, Marija V.
AU  - Vodnik, Vesna
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9334
AB  - The waterproof performance and formation of hydrogen bonds in polyurethane
(PU) networks based on Boltorn® hyperbranched polyester of the third pseudo
generation (BH-30), α,ω-dihydroxy-(ethylene oxide-poly(dimethylsiloxane)-
ethylene oxide) (EO-PDMS-EO) and 4,4’-methylenediphenyl diisocyanate (MDI)
were studied in this work. Obtained results revealed that as the content of EOPDMS-EO decreases, the degree of microphase separation increases, while the
water resistance of the prepared PU networks decreases.
PB  - Society of Physical Chemists of Serbia
C3  - Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry
T1  - Poly(urethane-ester-siloxane) networks
VL  - 2
SP  - 532
EP  - 534
UR  - https://hdl.handle.net/21.15107/rcub_vinar_9334
ER  - 

@conference{
author = "Džunuzović, Jasna V. and Pergal, Marija V. and Vodnik, Vesna",
year = "2012",
abstract = "The waterproof performance and formation of hydrogen bonds in polyurethane
(PU) networks based on Boltorn® hyperbranched polyester of the third pseudo
generation (BH-30), α,ω-dihydroxy-(ethylene oxide-poly(dimethylsiloxane)-
ethylene oxide) (EO-PDMS-EO) and 4,4’-methylenediphenyl diisocyanate (MDI)
were studied in this work. Obtained results revealed that as the content of EOPDMS-EO decreases, the degree of microphase separation increases, while the
water resistance of the prepared PU networks decreases.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry",
title = "Poly(urethane-ester-siloxane) networks",
volume = "2",
pages = "532-534",
url = "https://hdl.handle.net/21.15107/rcub_vinar_9334"
}

Džunuzović, J. V., Pergal, M. V.,& Vodnik, V.. (2012). Poly(urethane-ester-siloxane) networks. in Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry
Society of Physical Chemists of Serbia., 2, 532-534.
https://hdl.handle.net/21.15107/rcub_vinar_9334

Džunuzović JV, Pergal MV, Vodnik V. Poly(urethane-ester-siloxane) networks. in Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry. 2012;2:532-534.
https://hdl.handle.net/21.15107/rcub_vinar_9334 .

Džunuzović, Jasna V., Pergal, Marija V., Vodnik, Vesna, "Poly(urethane-ester-siloxane) networks" in Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry, 2 (2012):532-534,
https://hdl.handle.net/21.15107/rcub_vinar_9334 .

TY  - JOUR
AU  - Džunuzović, Jasna V.
AU  - Pergal, Marija V.
AU  - Vodnik, Vesna
AU  - Spirkova, Milena
AU  - Poreba, Rafal
AU  - Jovanovic, Slobodan
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5338
AB  - INVESTIGATION OF THE MORPHOLOGY AND SURFACE PROPERTIES OF CROSSLINKED POLY(URETHANE-ESTER-SILOXANE)S Jasna V. Dzunuzovic(1), Marija V. Pergal(1), Vesna V. Vodnik(2), Milena Spirkova(3), Rafal Poreba(3), Slobodan Jovanovic(4) (1)University of Belgrade, Institute of Chemistry, Technology and Metallurgy (ICTM) Center of Chemistry, Belgrade, Serbia (2)University of Belgrade, Institute of Nuclear Science Vinca, Belgrade, Serbia (3)Institute of Macromolecular Chemistry AS CR, v.v.i., Nanostructured Polymers and Composites Department, Praha, Czech Republic (4)University of Belgrade, Faculty of Technology and Metallurgy, Belgrade, Serbia (Scientific paper) Two series of crosslinked poly(urethane-ester-siloxane)s were synthesized from alpha,omega-dihydroxy-(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide) (EO-PDMS-EO), 4,4-methylenediphenyl diisocyanate and Boltorn (R) hyperbranched polyesters of the second and third pseudo generation, by two-step polymerization in solution. The effect of the EO-PDMS-EO content and functionality of the applied crosslinking agent on the morphology and surface properties of the prepared poly(urethane-ester-siloxane)s was investigated by FTIR spectroscopy, small-angle X-ray scattering (SAXS), atomic force microscopy (AFM), scanning electron microscopy (SEM) and water absorption measurement. Different techniques (FTIR peak deconvolution, SAXS and AFM) revealed that decrease of the crosslinking agent functionality and EO-PDMS-EO content promotes microphase separation in the synthesized poly(urethane-ester-siloxane)s. SEM analysis and water absorption experiments showed that, due to the hydrophobic character of EO-PDMS-EO and its ability to migrate to the surface of poly(urethane-ester-siloxane)s, samples synthesized with higher EO-PDMS-EO content and crosslinking agents of lower functionality had more hydrophobic surfaces and better waterproof performances. The obtained results indicate that the synthesis of poly(urethane-ester-siloxane)s based on EO-PDMS-EO and Boltorn (R) hyperbranched polyesters leads to the creation of networks with interesting morphological and surface properties, which can be easily tailored by changing the content of EO-PDMS-EO segment or functionality of hyperbranched polyester.
T2  - Hemijska industrija
T1  - Investigation of the Morphology and Surface Properties of Crosslinked Poly(Urethane-Ester-Siloxane)S
VL  - 66
IS  - 6
SP  - 813
EP  - 821
DO  - 10.2298/HEMIND121004101D
ER  - 

@article{
author = "Džunuzović, Jasna V. and Pergal, Marija V. and Vodnik, Vesna and Spirkova, Milena and Poreba, Rafal and Jovanovic, Slobodan",
year = "2012",
abstract = "INVESTIGATION OF THE MORPHOLOGY AND SURFACE PROPERTIES OF CROSSLINKED POLY(URETHANE-ESTER-SILOXANE)S Jasna V. Dzunuzovic(1), Marija V. Pergal(1), Vesna V. Vodnik(2), Milena Spirkova(3), Rafal Poreba(3), Slobodan Jovanovic(4) (1)University of Belgrade, Institute of Chemistry, Technology and Metallurgy (ICTM) Center of Chemistry, Belgrade, Serbia (2)University of Belgrade, Institute of Nuclear Science Vinca, Belgrade, Serbia (3)Institute of Macromolecular Chemistry AS CR, v.v.i., Nanostructured Polymers and Composites Department, Praha, Czech Republic (4)University of Belgrade, Faculty of Technology and Metallurgy, Belgrade, Serbia (Scientific paper) Two series of crosslinked poly(urethane-ester-siloxane)s were synthesized from alpha,omega-dihydroxy-(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide) (EO-PDMS-EO), 4,4-methylenediphenyl diisocyanate and Boltorn (R) hyperbranched polyesters of the second and third pseudo generation, by two-step polymerization in solution. The effect of the EO-PDMS-EO content and functionality of the applied crosslinking agent on the morphology and surface properties of the prepared poly(urethane-ester-siloxane)s was investigated by FTIR spectroscopy, small-angle X-ray scattering (SAXS), atomic force microscopy (AFM), scanning electron microscopy (SEM) and water absorption measurement. Different techniques (FTIR peak deconvolution, SAXS and AFM) revealed that decrease of the crosslinking agent functionality and EO-PDMS-EO content promotes microphase separation in the synthesized poly(urethane-ester-siloxane)s. SEM analysis and water absorption experiments showed that, due to the hydrophobic character of EO-PDMS-EO and its ability to migrate to the surface of poly(urethane-ester-siloxane)s, samples synthesized with higher EO-PDMS-EO content and crosslinking agents of lower functionality had more hydrophobic surfaces and better waterproof performances. The obtained results indicate that the synthesis of poly(urethane-ester-siloxane)s based on EO-PDMS-EO and Boltorn (R) hyperbranched polyesters leads to the creation of networks with interesting morphological and surface properties, which can be easily tailored by changing the content of EO-PDMS-EO segment or functionality of hyperbranched polyester.",
journal = "Hemijska industrija",
title = "Investigation of the Morphology and Surface Properties of Crosslinked Poly(Urethane-Ester-Siloxane)S",
volume = "66",
number = "6",
pages = "813-821",
doi = "10.2298/HEMIND121004101D"
}

Džunuzović, J. V., Pergal, M. V., Vodnik, V., Spirkova, M., Poreba, R.,& Jovanovic, S.. (2012). Investigation of the Morphology and Surface Properties of Crosslinked Poly(Urethane-Ester-Siloxane)S. in Hemijska industrija, 66(6), 813-821.
https://doi.org/10.2298/HEMIND121004101D

Džunuzović JV, Pergal MV, Vodnik V, Spirkova M, Poreba R, Jovanovic S. Investigation of the Morphology and Surface Properties of Crosslinked Poly(Urethane-Ester-Siloxane)S. in Hemijska industrija. 2012;66(6):813-821.
doi:10.2298/HEMIND121004101D .

Džunuzović, Jasna V., Pergal, Marija V., Vodnik, Vesna, Spirkova, Milena, Poreba, Rafal, Jovanovic, Slobodan, "Investigation of the Morphology and Surface Properties of Crosslinked Poly(Urethane-Ester-Siloxane)S" in Hemijska industrija, 66, no. 6 (2012):813-821,
https://doi.org/10.2298/HEMIND121004101D . .

TY  - JOUR
AU  - Džunuzović, Jasna V.
AU  - Pergal, Marija V.
AU  - Poreba, Rafal
AU  - Vodnik, Vesna
AU  - Simonović, Branislav R.
AU  - Spirkova, Milena
AU  - Jovanovic, Slobodan
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5229
AB  - Six polyurethane networks were synthesized from Boltorn (R) hyperbranched polyester of the second pseudo generation, alpha,omega-dihydroxy-(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide) (EO-PDMS-EO) and 4,4-methylenediphenyl diisocyanate. The effect of the EO-PDMS-EO content on the properties of prepared polyurethanes was investigated by dynamic mechanical thermal analysis (DMTA), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), swelling measurements, water contact angle and water absorption. Different techniques (FTIR peak deconvolution, DMTA and SEM) revealed that decrease of EO-PDMS-EO content promotes microphase separation in the synthesized polyurethanes. Samples synthesized with higher EO-PDMS-EO content have more hydrophobic surface and better waterproof performances, but lower crosslinking density. TGA results suggest that thermal stability of the synthesized polyurethane networks in nitrogen is significantly affected by the mutual influence of the crosslinking density and EO-PDMS-EO content. The results obtained in this work indicate that the synthesis of polyurethanes based on hyperbranched polyester and EO-PDMS-EO leads to the creation of networks with good thermal, thermomechanical and surface properties. (C) 2012 Elsevier B.V. All rights reserved.
T2  - Journal of Non-crystalline Solids
T1  - Analysis of dynamic mechanical, thermal and surface properties of poly(urethane-ester-siloxane) networks based on hyperbranched polyester
VL  - 358
IS  - 23
SP  - 3161
EP  - 3169
DO  - 10.1016/j.jnoncrysol.2012.09.013
ER  - 

@article{
author = "Džunuzović, Jasna V. and Pergal, Marija V. and Poreba, Rafal and Vodnik, Vesna and Simonović, Branislav R. and Spirkova, Milena and Jovanovic, Slobodan",
year = "2012",
abstract = "Six polyurethane networks were synthesized from Boltorn (R) hyperbranched polyester of the second pseudo generation, alpha,omega-dihydroxy-(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide) (EO-PDMS-EO) and 4,4-methylenediphenyl diisocyanate. The effect of the EO-PDMS-EO content on the properties of prepared polyurethanes was investigated by dynamic mechanical thermal analysis (DMTA), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), swelling measurements, water contact angle and water absorption. Different techniques (FTIR peak deconvolution, DMTA and SEM) revealed that decrease of EO-PDMS-EO content promotes microphase separation in the synthesized polyurethanes. Samples synthesized with higher EO-PDMS-EO content have more hydrophobic surface and better waterproof performances, but lower crosslinking density. TGA results suggest that thermal stability of the synthesized polyurethane networks in nitrogen is significantly affected by the mutual influence of the crosslinking density and EO-PDMS-EO content. The results obtained in this work indicate that the synthesis of polyurethanes based on hyperbranched polyester and EO-PDMS-EO leads to the creation of networks with good thermal, thermomechanical and surface properties. (C) 2012 Elsevier B.V. All rights reserved.",
journal = "Journal of Non-crystalline Solids",
title = "Analysis of dynamic mechanical, thermal and surface properties of poly(urethane-ester-siloxane) networks based on hyperbranched polyester",
volume = "358",
number = "23",
pages = "3161-3169",
doi = "10.1016/j.jnoncrysol.2012.09.013"
}

Džunuzović, J. V., Pergal, M. V., Poreba, R., Vodnik, V., Simonović, B. R., Spirkova, M.,& Jovanovic, S.. (2012). Analysis of dynamic mechanical, thermal and surface properties of poly(urethane-ester-siloxane) networks based on hyperbranched polyester. in Journal of Non-crystalline Solids, 358(23), 3161-3169.
https://doi.org/10.1016/j.jnoncrysol.2012.09.013

Džunuzović JV, Pergal MV, Poreba R, Vodnik V, Simonović BR, Spirkova M, Jovanovic S. Analysis of dynamic mechanical, thermal and surface properties of poly(urethane-ester-siloxane) networks based on hyperbranched polyester. in Journal of Non-crystalline Solids. 2012;358(23):3161-3169.
doi:10.1016/j.jnoncrysol.2012.09.013 .

Džunuzović, Jasna V., Pergal, Marija V., Poreba, Rafal, Vodnik, Vesna, Simonović, Branislav R., Spirkova, Milena, Jovanovic, Slobodan, "Analysis of dynamic mechanical, thermal and surface properties of poly(urethane-ester-siloxane) networks based on hyperbranched polyester" in Journal of Non-crystalline Solids, 358, no. 23 (2012):3161-3169,
https://doi.org/10.1016/j.jnoncrysol.2012.09.013 . .

TY  - JOUR
AU  - Džunuzović, Jasna V.
AU  - Pergal, Marija V.
AU  - Jovanovic, Slobodan
AU  - Vodnik, Vesna
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4765
AB  - A series of six polyurethane (PU) networks was synthesized from Boltorn (R) hydroxy-functional hyperbranched polyester (HBP) of the second pseudo generation as a cross-linking agent, alpha,omega-dihydroxy-(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide) (EO-PDMS-EO) and 4,4-methylenediphenyl diisocyanate, by two-step polymerization in solution. Each sample of the prepared PUs had different EO-PDMS-EO content. The chemical structure of the synthesized networks was analyzed by FTIR spectroscopy. The influence of the EO-PDMS-EO content and type of the solvent on the swelling behavior of the PUs in 2-propanol and toluene was investigated. During the swelling measurements, a certain amount of sal fractions was extracted from the PUs by solvents. According to the H-1-NMR results, sal fractions were mainly composed of the soluble hyperbranched PU, formed during the polymerization by partial modification of the end hydroxyl groups of HBP with NCO-terminated prepolymer synthesized in the first step of the reaction. Chains of the so reacted prepolymer can then fold back and form cyclic products by reaction of the free -NCO group from the NCO-terminated prepolymer with free -OH group of HBP. As the EO-PDMS-EO content increases the amount of the sol fractions and swelling degree also increased, indicating that networks with lower EO-PDMS-EO content are more cross-linked and have higher solvent resistance.
T2  - Hemijska industrija
T1  - Synthesis and swelling behavior of polyurethane networks based on hyperbranched polymer
VL  - 65
IS  - 6
SP  - 637
EP  - 644
DO  - 10.2298/HEMIND110902071D
ER  - 

@article{
author = "Džunuzović, Jasna V. and Pergal, Marija V. and Jovanovic, Slobodan and Vodnik, Vesna",
year = "2011",
abstract = "A series of six polyurethane (PU) networks was synthesized from Boltorn (R) hydroxy-functional hyperbranched polyester (HBP) of the second pseudo generation as a cross-linking agent, alpha,omega-dihydroxy-(ethylene oxide-poly(dimethylsiloxane)-ethylene oxide) (EO-PDMS-EO) and 4,4-methylenediphenyl diisocyanate, by two-step polymerization in solution. Each sample of the prepared PUs had different EO-PDMS-EO content. The chemical structure of the synthesized networks was analyzed by FTIR spectroscopy. The influence of the EO-PDMS-EO content and type of the solvent on the swelling behavior of the PUs in 2-propanol and toluene was investigated. During the swelling measurements, a certain amount of sal fractions was extracted from the PUs by solvents. According to the H-1-NMR results, sal fractions were mainly composed of the soluble hyperbranched PU, formed during the polymerization by partial modification of the end hydroxyl groups of HBP with NCO-terminated prepolymer synthesized in the first step of the reaction. Chains of the so reacted prepolymer can then fold back and form cyclic products by reaction of the free -NCO group from the NCO-terminated prepolymer with free -OH group of HBP. As the EO-PDMS-EO content increases the amount of the sol fractions and swelling degree also increased, indicating that networks with lower EO-PDMS-EO content are more cross-linked and have higher solvent resistance.",
journal = "Hemijska industrija",
title = "Synthesis and swelling behavior of polyurethane networks based on hyperbranched polymer",
volume = "65",
number = "6",
pages = "637-644",
doi = "10.2298/HEMIND110902071D"
}

Džunuzović, J. V., Pergal, M. V., Jovanovic, S.,& Vodnik, V.. (2011). Synthesis and swelling behavior of polyurethane networks based on hyperbranched polymer. in Hemijska industrija, 65(6), 637-644.
https://doi.org/10.2298/HEMIND110902071D

Džunuzović JV, Pergal MV, Jovanovic S, Vodnik V. Synthesis and swelling behavior of polyurethane networks based on hyperbranched polymer. in Hemijska industrija. 2011;65(6):637-644.
doi:10.2298/HEMIND110902071D .

Džunuzović, Jasna V., Pergal, Marija V., Jovanovic, Slobodan, Vodnik, Vesna, "Synthesis and swelling behavior of polyurethane networks based on hyperbranched polymer" in Hemijska industrija, 65, no. 6 (2011):637-644,
https://doi.org/10.2298/HEMIND110902071D . .

TY  - JOUR
AU  - Pergal, Marija V.
AU  - Džunuzović, Jasna V.
AU  - Kićanović, Miodrag
AU  - Vodnik, Vesna
AU  - Pergal, Miodrag M.
AU  - Jovanović, Svetlana P.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4598
AB  - Novel polyurethanes (PUs) were synthesized using hydroxy-terminated hyperbranched polyester (BH-20) and 4,4-methylenediphenyl diisocyanate (MDI) as hard segments and hydroxy-terminated ethylene oxide-poly(dimethylsiloxane)-ethylene oxide triblock copolymer (PDMS-EO) as soft segment, with soft segment content ranging from 30 to 60 wt %. The PUs were synthesized by two-step solution polymerization method. The influence of the soft segment content on the structure, swelling behavior and thermal properties of PUs was investigated. According to the results obtained by swelling measurements, the increase of the hard segment content resulted in the increase of the crosslinking density of synthesized samples. DSC results showed that the glass transition temperatures increase from 36 to 65A degrees C with increasing hard segment content. It was demonstrated using thermogravimetric analysis (TGA) that thermal stability of investigated PUs increases with increase of the soft PDMS-EO content. This was concluded from the temperatures corresponding to the 10 wt % loss, which represents the beginning of thermal degradation of samples.
T2  - Russian Journal of Physical Chemistry A
T1  - Thermal properties of poly(urethane-ester-siloxane)s based on hyperbranched polyester
VL  - 85
IS  - 13
SP  - 2251
EP  - 2256
DO  - 10.1134/S0036024411130243
ER  - 

@article{
author = "Pergal, Marija V. and Džunuzović, Jasna V. and Kićanović, Miodrag and Vodnik, Vesna and Pergal, Miodrag M. and Jovanović, Svetlana P.",
year = "2011",
abstract = "Novel polyurethanes (PUs) were synthesized using hydroxy-terminated hyperbranched polyester (BH-20) and 4,4-methylenediphenyl diisocyanate (MDI) as hard segments and hydroxy-terminated ethylene oxide-poly(dimethylsiloxane)-ethylene oxide triblock copolymer (PDMS-EO) as soft segment, with soft segment content ranging from 30 to 60 wt %. The PUs were synthesized by two-step solution polymerization method. The influence of the soft segment content on the structure, swelling behavior and thermal properties of PUs was investigated. According to the results obtained by swelling measurements, the increase of the hard segment content resulted in the increase of the crosslinking density of synthesized samples. DSC results showed that the glass transition temperatures increase from 36 to 65A degrees C with increasing hard segment content. It was demonstrated using thermogravimetric analysis (TGA) that thermal stability of investigated PUs increases with increase of the soft PDMS-EO content. This was concluded from the temperatures corresponding to the 10 wt % loss, which represents the beginning of thermal degradation of samples.",
journal = "Russian Journal of Physical Chemistry A",
title = "Thermal properties of poly(urethane-ester-siloxane)s based on hyperbranched polyester",
volume = "85",
number = "13",
pages = "2251-2256",
doi = "10.1134/S0036024411130243"
}

Pergal, M. V., Džunuzović, J. V., Kićanović, M., Vodnik, V., Pergal, M. M.,& Jovanović, S. P.. (2011). Thermal properties of poly(urethane-ester-siloxane)s based on hyperbranched polyester. in Russian Journal of Physical Chemistry A, 85(13), 2251-2256.
https://doi.org/10.1134/S0036024411130243

Pergal MV, Džunuzović JV, Kićanović M, Vodnik V, Pergal MM, Jovanović SP. Thermal properties of poly(urethane-ester-siloxane)s based on hyperbranched polyester. in Russian Journal of Physical Chemistry A. 2011;85(13):2251-2256.
doi:10.1134/S0036024411130243 .

Pergal, Marija V., Džunuzović, Jasna V., Kićanović, Miodrag, Vodnik, Vesna, Pergal, Miodrag M., Jovanović, Svetlana P., "Thermal properties of poly(urethane-ester-siloxane)s based on hyperbranched polyester" in Russian Journal of Physical Chemistry A, 85, no. 13 (2011):2251-2256,
https://doi.org/10.1134/S0036024411130243 . .

TY  - JOUR
AU  - Pergal, Marija V.
AU  - Antić, Vesna V.
AU  - Ostojić, Sanja 
AU  - Marinović-Cincović, Milena
AU  - Đonlagić, Jasna A.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4638
AB  - A series of novel thermoplastic urethane-siloxane copolymers (TPUSs) based on a alpha,omega-dihydroxy-[poly(epsilon-caprolactone)-b-poly(dimethylsiloxane)-b-poly(epsilon-caprolactone)] (alpha,omega-dihydroxy-PCL-PDMS-PCL) triblock. copolymer, 4,4-methylenediphenyl diisocyanate (MDI) and 1,4-butanediol (BD) was synthesized. The effects of the content (9-63 mass %) of hard urethane segments and their degree of polymerization on the properties of the segmented TPUSs were investigated. The structure, composition and hard segment degree of polymerization of the hard segments were examined using (1)H- and quantitative (13)C-NMR spectroscopy. The degree of crystallinity of the synthesized copolymers was determined using wide-angle X-ray scattering (WAXS). The surface properties were evaluated by measuring the water contact angle and water absorption. In the series of the TPUSs, the average degree of polymerization of the hard segments was varied from 1.2 to 14.4 MDI-BD units. It was found that average values from 3.8 to 14.4 MDI-BD units were effective segment lengths for crystallization of hard segments, which resulted in an increase in the degree of microphase separation of the copolymers. Spherulite-like superstructures were observed in copolymer films by scanning electron microscopy (SEM), which are believed to arise from the crystallization of the hard segments and/or PCL segments, depending on the content of the hard segments. The surface of the copolymers became more hydrophobic with increasing weight fraction of PDMS. The synthesized copolymers based on a PCL-PDMS-PCL segment showed good thermal stability, which increased with increasing content of soft PDMS segments, as was confirmed by the value of the starting temperature of thermal degradation.
T2  - Journal of the Serbian Chemical Society
T1  - Influence of the content of hard segments on the properties of novel urethane-siloxane copolymers based on a poly(epsilon-caprolactone)-b-poly(dimethylsiloxane)-b-poly(epsilon-caprolactone) triblock copolymer
VL  - 76
IS  - 12
SP  - 1703
EP  - 1723
DO  - 10.2298/JSC110307146P
ER  - 

@article{
author = "Pergal, Marija V. and Antić, Vesna V. and Ostojić, Sanja  and Marinović-Cincović, Milena and Đonlagić, Jasna A.",
year = "2011",
abstract = "A series of novel thermoplastic urethane-siloxane copolymers (TPUSs) based on a alpha,omega-dihydroxy-[poly(epsilon-caprolactone)-b-poly(dimethylsiloxane)-b-poly(epsilon-caprolactone)] (alpha,omega-dihydroxy-PCL-PDMS-PCL) triblock. copolymer, 4,4-methylenediphenyl diisocyanate (MDI) and 1,4-butanediol (BD) was synthesized. The effects of the content (9-63 mass %) of hard urethane segments and their degree of polymerization on the properties of the segmented TPUSs were investigated. The structure, composition and hard segment degree of polymerization of the hard segments were examined using (1)H- and quantitative (13)C-NMR spectroscopy. The degree of crystallinity of the synthesized copolymers was determined using wide-angle X-ray scattering (WAXS). The surface properties were evaluated by measuring the water contact angle and water absorption. In the series of the TPUSs, the average degree of polymerization of the hard segments was varied from 1.2 to 14.4 MDI-BD units. It was found that average values from 3.8 to 14.4 MDI-BD units were effective segment lengths for crystallization of hard segments, which resulted in an increase in the degree of microphase separation of the copolymers. Spherulite-like superstructures were observed in copolymer films by scanning electron microscopy (SEM), which are believed to arise from the crystallization of the hard segments and/or PCL segments, depending on the content of the hard segments. The surface of the copolymers became more hydrophobic with increasing weight fraction of PDMS. The synthesized copolymers based on a PCL-PDMS-PCL segment showed good thermal stability, which increased with increasing content of soft PDMS segments, as was confirmed by the value of the starting temperature of thermal degradation.",
journal = "Journal of the Serbian Chemical Society",
title = "Influence of the content of hard segments on the properties of novel urethane-siloxane copolymers based on a poly(epsilon-caprolactone)-b-poly(dimethylsiloxane)-b-poly(epsilon-caprolactone) triblock copolymer",
volume = "76",
number = "12",
pages = "1703-1723",
doi = "10.2298/JSC110307146P"
}

Pergal, M. V., Antić, V. V., Ostojić, S., Marinović-Cincović, M.,& Đonlagić, J. A.. (2011). Influence of the content of hard segments on the properties of novel urethane-siloxane copolymers based on a poly(epsilon-caprolactone)-b-poly(dimethylsiloxane)-b-poly(epsilon-caprolactone) triblock copolymer. in Journal of the Serbian Chemical Society, 76(12), 1703-1723.
https://doi.org/10.2298/JSC110307146P

Pergal MV, Antić VV, Ostojić S, Marinović-Cincović M, Đonlagić JA. Influence of the content of hard segments on the properties of novel urethane-siloxane copolymers based on a poly(epsilon-caprolactone)-b-poly(dimethylsiloxane)-b-poly(epsilon-caprolactone) triblock copolymer. in Journal of the Serbian Chemical Society. 2011;76(12):1703-1723.
doi:10.2298/JSC110307146P .

Pergal, Marija V., Antić, Vesna V., Ostojić, Sanja , Marinović-Cincović, Milena, Đonlagić, Jasna A., "Influence of the content of hard segments on the properties of novel urethane-siloxane copolymers based on a poly(epsilon-caprolactone)-b-poly(dimethylsiloxane)-b-poly(epsilon-caprolactone) triblock copolymer" in Journal of the Serbian Chemical Society, 76, no. 12 (2011):1703-1723,
https://doi.org/10.2298/JSC110307146P . .

TY  - CONF
AU  - Pergal, Marija V.
AU  - Džunuzović, Jasna V.
AU  - Kićanović, Miodrag
AU  - Vodnik, Vesna
AU  - Jovanović, Slobodan
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9337
AB  - The polyurethane (PU) elastomers based on hydroxy-terminated hyperbranched
polyester (BH-20) and 4,4′-methylenediphenyl diisocyanate (MDI) as hard
segments and hydroxyl-terminated ethylene oxide-poly(dimethylsiloxane)-
ethylene oxide (PDMS-EO) as soft segment, were synthesized and examined in
this work. The obtained results show that sol fraction decreases and thermal
stability increases with increase of the hard segment content.
PB  - Society of Physical Chemists of Serbia
C3  - Physical chemistry 2010 : 10th international conference on fundamental and applied aspects of physical chemistry
T1  - Novel crosslinked polyurethanes based on hyperbranched polyester
UR  - https://hdl.handle.net/21.15107/rcub_vinar_9337
ER  - 

@conference{
author = "Pergal, Marija V. and Džunuzović, Jasna V. and Kićanović, Miodrag and Vodnik, Vesna and Jovanović, Slobodan",
year = "2010",
abstract = "The polyurethane (PU) elastomers based on hydroxy-terminated hyperbranched
polyester (BH-20) and 4,4′-methylenediphenyl diisocyanate (MDI) as hard
segments and hydroxyl-terminated ethylene oxide-poly(dimethylsiloxane)-
ethylene oxide (PDMS-EO) as soft segment, were synthesized and examined in
this work. The obtained results show that sol fraction decreases and thermal
stability increases with increase of the hard segment content.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical chemistry 2010 : 10th international conference on fundamental and applied aspects of physical chemistry",
title = "Novel crosslinked polyurethanes based on hyperbranched polyester",
url = "https://hdl.handle.net/21.15107/rcub_vinar_9337"
}

Pergal, M. V., Džunuzović, J. V., Kićanović, M., Vodnik, V.,& Jovanović, S.. (2010). Novel crosslinked polyurethanes based on hyperbranched polyester. in Physical chemistry 2010 : 10th international conference on fundamental and applied aspects of physical chemistry
Society of Physical Chemists of Serbia..
https://hdl.handle.net/21.15107/rcub_vinar_9337

Pergal MV, Džunuzović JV, Kićanović M, Vodnik V, Jovanović S. Novel crosslinked polyurethanes based on hyperbranched polyester. in Physical chemistry 2010 : 10th international conference on fundamental and applied aspects of physical chemistry. 2010;.
https://hdl.handle.net/21.15107/rcub_vinar_9337 .

Pergal, Marija V., Džunuzović, Jasna V., Kićanović, Miodrag, Vodnik, Vesna, Jovanović, Slobodan, "Novel crosslinked polyurethanes based on hyperbranched polyester" in Physical chemistry 2010 : 10th international conference on fundamental and applied aspects of physical chemistry (2010),
https://hdl.handle.net/21.15107/rcub_vinar_9337 .

TY  - JOUR
AU  - Vuković, Jasna
AU  - Pergal, Marija V.
AU  - Jovanovic, Slobodan
AU  - Vodnik, Vesna
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3638
AB  - In this paper, two samples of polyurethane (PU) crosslinked with hydroxy-functonal hyperbranched aliphatic polyester of the second pseudo generation were investigated. For the synthesis of these crosslinked PUs two different macrodiols were used: poly(tetramethyleneoxide) (PTMO) for PUPTMO and ethylene oxide-poly(dimethylsiloxane)-ethylene oxide (PDMS-EO) for PUPDMS-EO sample, Synthesized samples behave as elastomers and have yellow color. Obtained results show that swelling degree of the sample PUPDMS-EO in N-methyl-2-pyrrolidinon (NMP) determined at room temperature is higher than for the sample PUPTMO. It has been also observed that thermal properties of these polyurethane networks can be changed by incorporation of siloxane sequences in their structure.
T2  - Hemijska industrija
T1  - Crosslinked Polyurethanes Based on Hyperbranched Polymers
VL  - 62
IS  - 6
SP  - 353
EP  - 359
DO  - 10.2298/HEMIND0806353V
ER  - 

@article{
author = "Vuković, Jasna and Pergal, Marija V. and Jovanovic, Slobodan and Vodnik, Vesna",
year = "2008",
abstract = "In this paper, two samples of polyurethane (PU) crosslinked with hydroxy-functonal hyperbranched aliphatic polyester of the second pseudo generation were investigated. For the synthesis of these crosslinked PUs two different macrodiols were used: poly(tetramethyleneoxide) (PTMO) for PUPTMO and ethylene oxide-poly(dimethylsiloxane)-ethylene oxide (PDMS-EO) for PUPDMS-EO sample, Synthesized samples behave as elastomers and have yellow color. Obtained results show that swelling degree of the sample PUPDMS-EO in N-methyl-2-pyrrolidinon (NMP) determined at room temperature is higher than for the sample PUPTMO. It has been also observed that thermal properties of these polyurethane networks can be changed by incorporation of siloxane sequences in their structure.",
journal = "Hemijska industrija",
title = "Crosslinked Polyurethanes Based on Hyperbranched Polymers",
volume = "62",
number = "6",
pages = "353-359",
doi = "10.2298/HEMIND0806353V"
}

Vuković, J., Pergal, M. V., Jovanovic, S.,& Vodnik, V.. (2008). Crosslinked Polyurethanes Based on Hyperbranched Polymers. in Hemijska industrija, 62(6), 353-359.
https://doi.org/10.2298/HEMIND0806353V

Vuković J, Pergal MV, Jovanovic S, Vodnik V. Crosslinked Polyurethanes Based on Hyperbranched Polymers. in Hemijska industrija. 2008;62(6):353-359.
doi:10.2298/HEMIND0806353V .

Vuković, Jasna, Pergal, Marija V., Jovanovic, Slobodan, Vodnik, Vesna, "Crosslinked Polyurethanes Based on Hyperbranched Polymers" in Hemijska industrija, 62, no. 6 (2008):353-359,
https://doi.org/10.2298/HEMIND0806353V . .