Džunuzović, Jasna V.

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  • Džunuzović, Jasna V. (18)
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Author's Bibliography

Visible light absorption of TiO2 nanoparticles surface-modified with vitamin B6: A comparative experimental and DFT study

Kovač, Tijana S.; Džunuzović, Enis S.; Džunuzović, Jasna V.; Milićević, Bojana R.; Sredojević, Dušan; Brothers, Edward N.; Nedeljković, Jovan

(2018)

TY  - JOUR
AU  - Kovač, Tijana S.
AU  - Džunuzović, Enis S.
AU  - Džunuzović, Jasna V.
AU  - Milićević, Bojana R.
AU  - Sredojević, Dušan
AU  - Brothers, Edward N.
AU  - Nedeljković, Jovan
PY  - 2018
UR  - http://www.doiserbia.nb.rs/Article.aspx?ID=0352-51391800044K
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7934
AB  - Surface modification of titanium dioxide nanoparticles (TiO2 NPs) with the biologically active molecule pyridoxine hydrochloride (vitamin B-6) was found to alter the optical properties. Microstructural characterization involving transmission electron microscopy (TEM) and X-ray diffraction (XRD) analysis revealed that the anatase TiO2 NPs had a narrow size distribution with an average diameter of 45 angstrom. The absorption onset of the surface-modified TiO2 samples was red-shifted by about 0.4 eV compared to the unmodified particles. The mode of binding between vitamin B-6 and the surface Ti atoms was investigated by Fourier transform infrared spectroscopy (FTIR). From the Benesi-Hildebrand plot, the stability constant of the surface complex was found to be of the order 10(2) M-1. The experimental findings were supported by detailed quantum chemical calculations based on the density functional theory (DFT). Agreement was found between the experimentally measured absorption spectra of the TiO2 NPs surface-modified with vitamin B-6 and the theoretically calculated electronic excitation spectra of the corresponding model system.
T2  - Journal of the Serbian Chemical Society
T1  - Visible light absorption of TiO2 nanoparticles surface-modified with vitamin B6: A comparative experimental and DFT study
VL  - 83
IS  - 7-8
SP  - 899
EP  - 909
DO  - 10.2298/JSC180131044K
ER  - 
@article{
author = "Kovač, Tijana S. and Džunuzović, Enis S. and Džunuzović, Jasna V. and Milićević, Bojana R. and Sredojević, Dušan and Brothers, Edward N. and Nedeljković, Jovan",
year = "2018",
abstract = "Surface modification of titanium dioxide nanoparticles (TiO2 NPs) with the biologically active molecule pyridoxine hydrochloride (vitamin B-6) was found to alter the optical properties. Microstructural characterization involving transmission electron microscopy (TEM) and X-ray diffraction (XRD) analysis revealed that the anatase TiO2 NPs had a narrow size distribution with an average diameter of 45 angstrom. The absorption onset of the surface-modified TiO2 samples was red-shifted by about 0.4 eV compared to the unmodified particles. The mode of binding between vitamin B-6 and the surface Ti atoms was investigated by Fourier transform infrared spectroscopy (FTIR). From the Benesi-Hildebrand plot, the stability constant of the surface complex was found to be of the order 10(2) M-1. The experimental findings were supported by detailed quantum chemical calculations based on the density functional theory (DFT). Agreement was found between the experimentally measured absorption spectra of the TiO2 NPs surface-modified with vitamin B-6 and the theoretically calculated electronic excitation spectra of the corresponding model system.",
journal = "Journal of the Serbian Chemical Society",
title = "Visible light absorption of TiO2 nanoparticles surface-modified with vitamin B6: A comparative experimental and DFT study",
volume = "83",
number = "7-8",
pages = "899-909",
doi = "10.2298/JSC180131044K"
}
Kovač, T. S., Džunuzović, E. S., Džunuzović, J. V., Milićević, B. R., Sredojević, D., Brothers, E. N.,& Nedeljković, J.. (2018). Visible light absorption of TiO2 nanoparticles surface-modified with vitamin B6: A comparative experimental and DFT study. in Journal of the Serbian Chemical Society, 83(7-8), 899-909.
https://doi.org/10.2298/JSC180131044K
Kovač TS, Džunuzović ES, Džunuzović JV, Milićević BR, Sredojević D, Brothers EN, Nedeljković J. Visible light absorption of TiO2 nanoparticles surface-modified with vitamin B6: A comparative experimental and DFT study. in Journal of the Serbian Chemical Society. 2018;83(7-8):899-909.
doi:10.2298/JSC180131044K .
Kovač, Tijana S., Džunuzović, Enis S., Džunuzović, Jasna V., Milićević, Bojana R., Sredojević, Dušan, Brothers, Edward N., Nedeljković, Jovan, "Visible light absorption of TiO2 nanoparticles surface-modified with vitamin B6: A comparative experimental and DFT study" in Journal of the Serbian Chemical Society, 83, no. 7-8 (2018):899-909,
https://doi.org/10.2298/JSC180131044K . .
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Preparation and properties of short oil alkyd resin/TiO 2 nanocomposites based on surface modified TiO 2 nanoparticles

Radoman, Tijana S.; Džunuzović, Jasna V.; Spasojević, Pavle M.; Marinović-Cincović, Milena; Jeremić, Katarina B.; Popović, Ivanka G.; Džunuzović, Enis S.

(2018)

TY  - JOUR
AU  - Radoman, Tijana S.
AU  - Džunuzović, Jasna V.
AU  - Spasojević, Pavle M.
AU  - Marinović-Cincović, Milena
AU  - Jeremić, Katarina B.
AU  - Popović, Ivanka G.
AU  - Džunuzović, Enis S.
PY  - 2018
UR  - http://doi.wiley.com/10.1002/pc.24089
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7789
AB  - Alkyd resin/TiO2 nanocomposites (NC) were prepared from short oil alkyd resin and TiO2 nanoparticles (NPs) surface modified with in situ formed imine ligand, based on 3,4-dihydroxybenzaldehyde and oleylamine, or with three gallic acid esters. The short oil alkyd resin was synthesized from sunflower oil, phthalic anhydride, and trimethylolpropane. Unmodified and surface modified TiO2 NPs were examined by transmission electron microscopy. Rheological investigation revealed that prepared dispersions have higher dynamic viscosity than pure alkyd resin. Using different characterization methods it was obtained that NCs have similar thermooxidative stability as alkyd resin, lower glass transition temperature, better barrier properties, enhanced hardness, better chemical resistance, and lower adhesion to the metal, except in the case of NC prepared using TiO2 NPs surface modified with imine, which exhibited better adhesion to the metal than pure alkyd resin.
T2  - Polymer Composites
T1  - Preparation and properties of short oil alkyd resin/TiO 2 nanocomposites based on surface modified TiO 2 nanoparticles
VL  - 39
IS  - 5
SP  - 1488
EP  - 1499
DO  - 10.1002/pc.24089
ER  - 
@article{
author = "Radoman, Tijana S. and Džunuzović, Jasna V. and Spasojević, Pavle M. and Marinović-Cincović, Milena and Jeremić, Katarina B. and Popović, Ivanka G. and Džunuzović, Enis S.",
year = "2018",
abstract = "Alkyd resin/TiO2 nanocomposites (NC) were prepared from short oil alkyd resin and TiO2 nanoparticles (NPs) surface modified with in situ formed imine ligand, based on 3,4-dihydroxybenzaldehyde and oleylamine, or with three gallic acid esters. The short oil alkyd resin was synthesized from sunflower oil, phthalic anhydride, and trimethylolpropane. Unmodified and surface modified TiO2 NPs were examined by transmission electron microscopy. Rheological investigation revealed that prepared dispersions have higher dynamic viscosity than pure alkyd resin. Using different characterization methods it was obtained that NCs have similar thermooxidative stability as alkyd resin, lower glass transition temperature, better barrier properties, enhanced hardness, better chemical resistance, and lower adhesion to the metal, except in the case of NC prepared using TiO2 NPs surface modified with imine, which exhibited better adhesion to the metal than pure alkyd resin.",
journal = "Polymer Composites",
title = "Preparation and properties of short oil alkyd resin/TiO 2 nanocomposites based on surface modified TiO 2 nanoparticles",
volume = "39",
number = "5",
pages = "1488-1499",
doi = "10.1002/pc.24089"
}
Radoman, T. S., Džunuzović, J. V., Spasojević, P. M., Marinović-Cincović, M., Jeremić, K. B., Popović, I. G.,& Džunuzović, E. S.. (2018). Preparation and properties of short oil alkyd resin/TiO 2 nanocomposites based on surface modified TiO 2 nanoparticles. in Polymer Composites, 39(5), 1488-1499.
https://doi.org/10.1002/pc.24089
Radoman TS, Džunuzović JV, Spasojević PM, Marinović-Cincović M, Jeremić KB, Popović IG, Džunuzović ES. Preparation and properties of short oil alkyd resin/TiO 2 nanocomposites based on surface modified TiO 2 nanoparticles. in Polymer Composites. 2018;39(5):1488-1499.
doi:10.1002/pc.24089 .
Radoman, Tijana S., Džunuzović, Jasna V., Spasojević, Pavle M., Marinović-Cincović, Milena, Jeremić, Katarina B., Popović, Ivanka G., Džunuzović, Enis S., "Preparation and properties of short oil alkyd resin/TiO 2 nanocomposites based on surface modified TiO 2 nanoparticles" in Polymer Composites, 39, no. 5 (2018):1488-1499,
https://doi.org/10.1002/pc.24089 . .
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Effect of the Modified Silica Nanofiller on the Mechanical Properties of Unsaturated Polyester Resins Based on Recycled Polyethylene Terephthalate

Rusmirović, Jelena D.; Radoman, Tijana S.; Džunuzović, Enis S.; Džunuzović, Jasna V.; Markovski, Jasmina S.; Spasojević, Pavle M.; Marinković, Aleksandar D.

(2017)

TY  - JOUR
AU  - Rusmirović, Jelena D.
AU  - Radoman, Tijana S.
AU  - Džunuzović, Enis S.
AU  - Džunuzović, Jasna V.
AU  - Markovski, Jasmina S.
AU  - Spasojević, Pavle M.
AU  - Marinković, Aleksandar D.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1473
AB  - Unsaturated polyester resin (UPe)-based nanocomposites and fumed silica Aerosil R812S, R805 and R816, and R200 modified with phenyl terminal group, R200NPh, were prepared. UPe resins were synthesized from maleic anhydride and products of glycolysis, obtained by polyethylene terephthalate depolymerization with dipropylene glycol in the presence of tetrabutyl titanate catalyst. The obtained unsaturated polyesters were characterized by acid, hydroxyl, and iodine values and by FTIR and NMR analysis. The microstructural analysis of the prepared nanocomposites, performed by using transmission electron microscopy, confirmed that silica nanoparticles formed chain-like aggregates in the polymer matrix. The presence of modified silica nanoparticles had no influence on the glass transition temperature and thermal stability of polyester matrix. The tensile modulus, stress at break, and hardness of cured products increased with increasing silica content. The impact strength of cured samples was not influenced by the silica content. (C) 2015 Society of Plastics Engineers
T2  - Polymer Composites
T1  - Effect of the Modified Silica Nanofiller on the Mechanical Properties of Unsaturated Polyester Resins Based on Recycled Polyethylene Terephthalate
VL  - 38
IS  - 3
SP  - 538
EP  - 554
DO  - 10.1002/pc.23613
ER  - 
@article{
author = "Rusmirović, Jelena D. and Radoman, Tijana S. and Džunuzović, Enis S. and Džunuzović, Jasna V. and Markovski, Jasmina S. and Spasojević, Pavle M. and Marinković, Aleksandar D.",
year = "2017",
abstract = "Unsaturated polyester resin (UPe)-based nanocomposites and fumed silica Aerosil R812S, R805 and R816, and R200 modified with phenyl terminal group, R200NPh, were prepared. UPe resins were synthesized from maleic anhydride and products of glycolysis, obtained by polyethylene terephthalate depolymerization with dipropylene glycol in the presence of tetrabutyl titanate catalyst. The obtained unsaturated polyesters were characterized by acid, hydroxyl, and iodine values and by FTIR and NMR analysis. The microstructural analysis of the prepared nanocomposites, performed by using transmission electron microscopy, confirmed that silica nanoparticles formed chain-like aggregates in the polymer matrix. The presence of modified silica nanoparticles had no influence on the glass transition temperature and thermal stability of polyester matrix. The tensile modulus, stress at break, and hardness of cured products increased with increasing silica content. The impact strength of cured samples was not influenced by the silica content. (C) 2015 Society of Plastics Engineers",
journal = "Polymer Composites",
title = "Effect of the Modified Silica Nanofiller on the Mechanical Properties of Unsaturated Polyester Resins Based on Recycled Polyethylene Terephthalate",
volume = "38",
number = "3",
pages = "538-554",
doi = "10.1002/pc.23613"
}
Rusmirović, J. D., Radoman, T. S., Džunuzović, E. S., Džunuzović, J. V., Markovski, J. S., Spasojević, P. M.,& Marinković, A. D.. (2017). Effect of the Modified Silica Nanofiller on the Mechanical Properties of Unsaturated Polyester Resins Based on Recycled Polyethylene Terephthalate. in Polymer Composites, 38(3), 538-554.
https://doi.org/10.1002/pc.23613
Rusmirović JD, Radoman TS, Džunuzović ES, Džunuzović JV, Markovski JS, Spasojević PM, Marinković AD. Effect of the Modified Silica Nanofiller on the Mechanical Properties of Unsaturated Polyester Resins Based on Recycled Polyethylene Terephthalate. in Polymer Composites. 2017;38(3):538-554.
doi:10.1002/pc.23613 .
Rusmirović, Jelena D., Radoman, Tijana S., Džunuzović, Enis S., Džunuzović, Jasna V., Markovski, Jasmina S., Spasojević, Pavle M., Marinković, Aleksandar D., "Effect of the Modified Silica Nanofiller on the Mechanical Properties of Unsaturated Polyester Resins Based on Recycled Polyethylene Terephthalate" in Polymer Composites, 38, no. 3 (2017):538-554,
https://doi.org/10.1002/pc.23613 . .
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Photocatalytic Ability of Visible-Light-Responsive TiO2 Nanoparticles

Vukoje, Ivana D.; Kovač, Tijana S.; Džunuzović, Jasna V.; Džunuzović, Enis S.; Lončarević, Davor; Ahrenkiel, Scott Phillip; Nedeljković, Jovan

(2016)

TY  - JOUR
AU  - Vukoje, Ivana D.
AU  - Kovač, Tijana S.
AU  - Džunuzović, Jasna V.
AU  - Džunuzović, Enis S.
AU  - Lončarević, Davor
AU  - Ahrenkiel, Scott Phillip
AU  - Nedeljković, Jovan
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1221
AB  - The synthetic procedures for preparation of free-standing and attached to polymer support surface modified TiO2 nanoparticles (NPs) with absorption extended into the visible spectral region due to charge transfer complex formation were developed. The one-step synthesis of colloids consisting of surface-modified TiO2 NPs is based on the reaction between titanium(IV) isopropoxide (TTIP) and lauryl galatte in nonprotic organic solvents (tetrahydrofuran, xylol, chloroform). The poly(GMA-co-EGDMA) copolymer decorated with surface-modified TiO2 NPs was obtained in two steps. First, copolymer was functionalized with dopamine and then treated with TTIP in organic solvent at slightly elevated temperature. Thorough microstructural and optical characterization of free-standing and attached to polymer support surface-modified TiO2 NPs was performed involving transmission electron microscopy as well as absorption and reflection spectroscopy. Infrared spectroscopy was used to understand coordination of ligands to surface Ti atoms. Photoredox chemistry of surface-modified TiO2 NPs attached to the polymer support was tested. Enhanced photooxidative ability of composite was demonstrated by degradation of organic dye crystal violet under visible light illumination, i.e., using photons with energy smaller than 2.75 eV. On the other hand, photocatalytic hydrogen production was used to demonstrate photoreduction ability of surface modified TiO2 NPs attached to the polymer support.
T2  - Journal of Physical Chemistry. C
T1  - Photocatalytic Ability of Visible-Light-Responsive TiO2 Nanoparticles
VL  - 120
IS  - 33
SP  - 18560
EP  - 18569
DO  - 10.1021/acs.jpcc.6b04293
ER  - 
@article{
author = "Vukoje, Ivana D. and Kovač, Tijana S. and Džunuzović, Jasna V. and Džunuzović, Enis S. and Lončarević, Davor and Ahrenkiel, Scott Phillip and Nedeljković, Jovan",
year = "2016",
abstract = "The synthetic procedures for preparation of free-standing and attached to polymer support surface modified TiO2 nanoparticles (NPs) with absorption extended into the visible spectral region due to charge transfer complex formation were developed. The one-step synthesis of colloids consisting of surface-modified TiO2 NPs is based on the reaction between titanium(IV) isopropoxide (TTIP) and lauryl galatte in nonprotic organic solvents (tetrahydrofuran, xylol, chloroform). The poly(GMA-co-EGDMA) copolymer decorated with surface-modified TiO2 NPs was obtained in two steps. First, copolymer was functionalized with dopamine and then treated with TTIP in organic solvent at slightly elevated temperature. Thorough microstructural and optical characterization of free-standing and attached to polymer support surface-modified TiO2 NPs was performed involving transmission electron microscopy as well as absorption and reflection spectroscopy. Infrared spectroscopy was used to understand coordination of ligands to surface Ti atoms. Photoredox chemistry of surface-modified TiO2 NPs attached to the polymer support was tested. Enhanced photooxidative ability of composite was demonstrated by degradation of organic dye crystal violet under visible light illumination, i.e., using photons with energy smaller than 2.75 eV. On the other hand, photocatalytic hydrogen production was used to demonstrate photoreduction ability of surface modified TiO2 NPs attached to the polymer support.",
journal = "Journal of Physical Chemistry. C",
title = "Photocatalytic Ability of Visible-Light-Responsive TiO2 Nanoparticles",
volume = "120",
number = "33",
pages = "18560-18569",
doi = "10.1021/acs.jpcc.6b04293"
}
Vukoje, I. D., Kovač, T. S., Džunuzović, J. V., Džunuzović, E. S., Lončarević, D., Ahrenkiel, S. P.,& Nedeljković, J.. (2016). Photocatalytic Ability of Visible-Light-Responsive TiO2 Nanoparticles. in Journal of Physical Chemistry. C, 120(33), 18560-18569.
https://doi.org/10.1021/acs.jpcc.6b04293
Vukoje ID, Kovač TS, Džunuzović JV, Džunuzović ES, Lončarević D, Ahrenkiel SP, Nedeljković J. Photocatalytic Ability of Visible-Light-Responsive TiO2 Nanoparticles. in Journal of Physical Chemistry. C. 2016;120(33):18560-18569.
doi:10.1021/acs.jpcc.6b04293 .
Vukoje, Ivana D., Kovač, Tijana S., Džunuzović, Jasna V., Džunuzović, Enis S., Lončarević, Davor, Ahrenkiel, Scott Phillip, Nedeljković, Jovan, "Photocatalytic Ability of Visible-Light-Responsive TiO2 Nanoparticles" in Journal of Physical Chemistry. C, 120, no. 33 (2016):18560-18569,
https://doi.org/10.1021/acs.jpcc.6b04293 . .
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Improvement of the epoxy coating properties by incorporation of polyaniline surface treated TiO2 nanoparticles previously modified with vitamin B6

Radoman, Tijana S.; Džunuzović, Jasna V.; Grgur, Branimir N.; Gvozdenovic, Milica M.; Jugović, Branimir Z.; Miličević, Dejan S.; Džunuzović, Enis S.

(2016)

TY  - JOUR
AU  - Radoman, Tijana S.
AU  - Džunuzović, Jasna V.
AU  - Grgur, Branimir N.
AU  - Gvozdenovic, Milica M.
AU  - Jugović, Branimir Z.
AU  - Miličević, Dejan S.
AU  - Džunuzović, Enis S.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1223
AB  - Novel TiO2-PANI core-shell nanocomposite, prepared by in situ oxidative polymerization of aniline in the presence of TiO2 nanoparticles surface modified with vitamin B6, was used to reinforce epoxy resin. The size of prepared TiO2 nanoparticles and TiO2-PANI nanocomposite were determined by a transmission electron microscopy (TEM). The surface modification of TiO2 nanoparticles was confirmed by FTIR and UV-vis spectroscopy, while the morphology of PANI and TiO2-PANI nanocomposite was investigated by scanning electron microscopy (SEM). The influence of TiO2-PANI nanocomposite on glass transition temperature, dielectric and dynamic mechanical properties, thermooxidative stability, mechanical and anticorrosion properties of epoxy based nanocomposites was investigated and compared to the properties of epoxy/PANI nanocomposites. It has been observed that the glass transition temperature of epoxy resin increases after introduction of PANI and TiO2-PANI nanocomposite, as well as with increasing their content. Prepared nanocomposites exhibited higher value of dielectric constant than pure epoxy resin. Epoxy based coating containing TiO2-PANI nanocomposite showed lower dielectric loss, higher hardness and better anticorrosion properties than pure epoxy resin and epoxy/PANI nanocomposite. (C) 2016 Elsevier B.V. All rights reserved.
T2  - Progress in Organic Coatings
T1  - Improvement of the epoxy coating properties by incorporation of polyaniline surface treated TiO2 nanoparticles previously modified with vitamin B6
VL  - 99
SP  - 346
EP  - 355
DO  - 10.1016/j.porgcoat.2016.06.014
ER  - 
@article{
author = "Radoman, Tijana S. and Džunuzović, Jasna V. and Grgur, Branimir N. and Gvozdenovic, Milica M. and Jugović, Branimir Z. and Miličević, Dejan S. and Džunuzović, Enis S.",
year = "2016",
abstract = "Novel TiO2-PANI core-shell nanocomposite, prepared by in situ oxidative polymerization of aniline in the presence of TiO2 nanoparticles surface modified with vitamin B6, was used to reinforce epoxy resin. The size of prepared TiO2 nanoparticles and TiO2-PANI nanocomposite were determined by a transmission electron microscopy (TEM). The surface modification of TiO2 nanoparticles was confirmed by FTIR and UV-vis spectroscopy, while the morphology of PANI and TiO2-PANI nanocomposite was investigated by scanning electron microscopy (SEM). The influence of TiO2-PANI nanocomposite on glass transition temperature, dielectric and dynamic mechanical properties, thermooxidative stability, mechanical and anticorrosion properties of epoxy based nanocomposites was investigated and compared to the properties of epoxy/PANI nanocomposites. It has been observed that the glass transition temperature of epoxy resin increases after introduction of PANI and TiO2-PANI nanocomposite, as well as with increasing their content. Prepared nanocomposites exhibited higher value of dielectric constant than pure epoxy resin. Epoxy based coating containing TiO2-PANI nanocomposite showed lower dielectric loss, higher hardness and better anticorrosion properties than pure epoxy resin and epoxy/PANI nanocomposite. (C) 2016 Elsevier B.V. All rights reserved.",
journal = "Progress in Organic Coatings",
title = "Improvement of the epoxy coating properties by incorporation of polyaniline surface treated TiO2 nanoparticles previously modified with vitamin B6",
volume = "99",
pages = "346-355",
doi = "10.1016/j.porgcoat.2016.06.014"
}
Radoman, T. S., Džunuzović, J. V., Grgur, B. N., Gvozdenovic, M. M., Jugović, B. Z., Miličević, D. S.,& Džunuzović, E. S.. (2016). Improvement of the epoxy coating properties by incorporation of polyaniline surface treated TiO2 nanoparticles previously modified with vitamin B6. in Progress in Organic Coatings, 99, 346-355.
https://doi.org/10.1016/j.porgcoat.2016.06.014
Radoman TS, Džunuzović JV, Grgur BN, Gvozdenovic MM, Jugović BZ, Miličević DS, Džunuzović ES. Improvement of the epoxy coating properties by incorporation of polyaniline surface treated TiO2 nanoparticles previously modified with vitamin B6. in Progress in Organic Coatings. 2016;99:346-355.
doi:10.1016/j.porgcoat.2016.06.014 .
Radoman, Tijana S., Džunuzović, Jasna V., Grgur, Branimir N., Gvozdenovic, Milica M., Jugović, Branimir Z., Miličević, Dejan S., Džunuzović, Enis S., "Improvement of the epoxy coating properties by incorporation of polyaniline surface treated TiO2 nanoparticles previously modified with vitamin B6" in Progress in Organic Coatings, 99 (2016):346-355,
https://doi.org/10.1016/j.porgcoat.2016.06.014 . .
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Characterization of silver/polystyrene nanocomposites prepared by in situ bulk radical polymerization

Vukoje, Ivana D.; Vodnik, Vesna; Džunuzović, Jasna V.; Džunuzović, Enis S.; Marinović-Cincović, Milena; Jeremić, Katarina B.; Nedeljković, Jovan

(2014)

TY  - JOUR
AU  - Vukoje, Ivana D.
AU  - Vodnik, Vesna
AU  - Džunuzović, Jasna V.
AU  - Džunuzović, Enis S.
AU  - Marinović-Cincović, Milena
AU  - Jeremić, Katarina B.
AU  - Nedeljković, Jovan
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5846
AB  - Nanocomposites (NCs) with different content of silver nanoparticles (Ag NPs) embeded in polystyrene (PS) matrix were prepared by in situ bulk radical polymerization. The nearly monodisperse Ag NPs protected with oleylamine were synthesized via organic solvo-thermal method and further used as a filler. The as-prepared spherical Ag NPs with diameter of 7.0 +/- 1.5 nm were well dispersed in the PS matrix. The structural properties of the resulting Ag/PS NCs were characterized by transmission electron microscope (TEM) and Fourier transform infrared (FTIR) spectroscopy, while optical properties were characterized using optical absorption measurements. The gel permeation chromatography (GPC) measurements showed that the presence of Ag NPs stabilized with oleylamine has no influence on the molecular weight and polydispersity of the PS matrix. The influence of silver content on the thermal properties of Ag/PS NCs was investigated by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The results indicated that resistance of PS to thermal degradation was improved upon incorporation of Ag NPs. The Ag/PS NCs have lower glass transition temperatures than net PS because loosely packed oleylamine molecules at the interface caused the increase of free volume and chain segments mobility near the surface of Ag NPs. (C) 2013 Elsevier Ltd. All rights reserved.
T2  - Materials Research Bulletin
T1  - Characterization of silver/polystyrene nanocomposites prepared by in situ bulk radical polymerization
VL  - 49
SP  - 434
EP  - 439
DO  - 10.1016/j.materresbull.2013.09.029
ER  - 
@article{
author = "Vukoje, Ivana D. and Vodnik, Vesna and Džunuzović, Jasna V. and Džunuzović, Enis S. and Marinović-Cincović, Milena and Jeremić, Katarina B. and Nedeljković, Jovan",
year = "2014",
abstract = "Nanocomposites (NCs) with different content of silver nanoparticles (Ag NPs) embeded in polystyrene (PS) matrix were prepared by in situ bulk radical polymerization. The nearly monodisperse Ag NPs protected with oleylamine were synthesized via organic solvo-thermal method and further used as a filler. The as-prepared spherical Ag NPs with diameter of 7.0 +/- 1.5 nm were well dispersed in the PS matrix. The structural properties of the resulting Ag/PS NCs were characterized by transmission electron microscope (TEM) and Fourier transform infrared (FTIR) spectroscopy, while optical properties were characterized using optical absorption measurements. The gel permeation chromatography (GPC) measurements showed that the presence of Ag NPs stabilized with oleylamine has no influence on the molecular weight and polydispersity of the PS matrix. The influence of silver content on the thermal properties of Ag/PS NCs was investigated by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The results indicated that resistance of PS to thermal degradation was improved upon incorporation of Ag NPs. The Ag/PS NCs have lower glass transition temperatures than net PS because loosely packed oleylamine molecules at the interface caused the increase of free volume and chain segments mobility near the surface of Ag NPs. (C) 2013 Elsevier Ltd. All rights reserved.",
journal = "Materials Research Bulletin",
title = "Characterization of silver/polystyrene nanocomposites prepared by in situ bulk radical polymerization",
volume = "49",
pages = "434-439",
doi = "10.1016/j.materresbull.2013.09.029"
}
Vukoje, I. D., Vodnik, V., Džunuzović, J. V., Džunuzović, E. S., Marinović-Cincović, M., Jeremić, K. B.,& Nedeljković, J.. (2014). Characterization of silver/polystyrene nanocomposites prepared by in situ bulk radical polymerization. in Materials Research Bulletin, 49, 434-439.
https://doi.org/10.1016/j.materresbull.2013.09.029
Vukoje ID, Vodnik V, Džunuzović JV, Džunuzović ES, Marinović-Cincović M, Jeremić KB, Nedeljković J. Characterization of silver/polystyrene nanocomposites prepared by in situ bulk radical polymerization. in Materials Research Bulletin. 2014;49:434-439.
doi:10.1016/j.materresbull.2013.09.029 .
Vukoje, Ivana D., Vodnik, Vesna, Džunuzović, Jasna V., Džunuzović, Enis S., Marinović-Cincović, Milena, Jeremić, Katarina B., Nedeljković, Jovan, "Characterization of silver/polystyrene nanocomposites prepared by in situ bulk radical polymerization" in Materials Research Bulletin, 49 (2014):434-439,
https://doi.org/10.1016/j.materresbull.2013.09.029 . .
18
15
17

Improvement of epoxy resin properties by incorporation of TiO2 nanoparticles surface modified with gallic acid esters

Radoman, Tijana S.; Džunuzović, Jasna V.; Jeremić, Katarina B.; Grgur, Branimir N.; Miličević, Dejan S.; Popović, Ivanka G.; Džunuzović, Enis S.

(2014)

TY  - JOUR
AU  - Radoman, Tijana S.
AU  - Džunuzović, Jasna V.
AU  - Jeremić, Katarina B.
AU  - Grgur, Branimir N.
AU  - Miličević, Dejan S.
AU  - Popović, Ivanka G.
AU  - Džunuzović, Enis S.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6098
AB  - Epoxy resin/titanium dioxide (epoxy/TiO2) nanocomposites were obtained by incorporation of TiO2 nanoparticles surface modified with gallic acid esters in epoxy resin. TiO2 nanoparticles were obtained by acid catalyzed hydrolysis of titanium isopropoxide and their structural characterization was performed by X-ray diffraction and transmission electron microscopy. Three gallic acid esters, having different hydrophobic part, were used for surface modification of the synthesized TiO2 nanoparticles: propyl, hexyl and lauryl gallate. The gallate chemisorption onto surface of TiO2 nanoparticles was confirmed by Fourier transform infrared and ultraviolet-visible spectroscopy, while the amount of surface-bonded gallates was determined using thermogravimetric analysis. The influence of the surface modified TiO2 nanoparticles, as well as the length of hydrophobic part of the gallate used for surface modification of TiO2 nanoparticles, on glass transition temperature, barrier, dielectric and anticorrosive properties of epoxy resin was investigated by differential scanning calorimetry, water vapor transmission test, dielectric spectroscopy, electrochemical impedance spectroscopy and polarization measurements. Incorporation of surface modified TiO2 nanoparticles in epoxy resin caused increase of glass transition temperature and decrease of the water vapor permeability of epoxy resin. The water vapor transmission rate of epoxy/TiO2 nanocomposites was reduced with increasing hydrophobic part chain length of gallate ligand. Dielectric constant of examined nanocomposites was influenced by gallate used for the modification of TiO2 nanoparticles. The nanocomposites have better anticorrosive properties than pure epoxy resin, because the surface modified TiO2 nanoparticles react as oxygen scavengers, which inhibit steel corrosion by cathodic mechanism. (C) 2014 Elsevier Ltd. All rights reserved.
T2  - Materials and Design
T1  - Improvement of epoxy resin properties by incorporation of TiO2 nanoparticles surface modified with gallic acid esters
VL  - 62
SP  - 158
EP  - 167
DO  - 10.1016/j.matdes.2014.05.015
ER  - 
@article{
author = "Radoman, Tijana S. and Džunuzović, Jasna V. and Jeremić, Katarina B. and Grgur, Branimir N. and Miličević, Dejan S. and Popović, Ivanka G. and Džunuzović, Enis S.",
year = "2014",
abstract = "Epoxy resin/titanium dioxide (epoxy/TiO2) nanocomposites were obtained by incorporation of TiO2 nanoparticles surface modified with gallic acid esters in epoxy resin. TiO2 nanoparticles were obtained by acid catalyzed hydrolysis of titanium isopropoxide and their structural characterization was performed by X-ray diffraction and transmission electron microscopy. Three gallic acid esters, having different hydrophobic part, were used for surface modification of the synthesized TiO2 nanoparticles: propyl, hexyl and lauryl gallate. The gallate chemisorption onto surface of TiO2 nanoparticles was confirmed by Fourier transform infrared and ultraviolet-visible spectroscopy, while the amount of surface-bonded gallates was determined using thermogravimetric analysis. The influence of the surface modified TiO2 nanoparticles, as well as the length of hydrophobic part of the gallate used for surface modification of TiO2 nanoparticles, on glass transition temperature, barrier, dielectric and anticorrosive properties of epoxy resin was investigated by differential scanning calorimetry, water vapor transmission test, dielectric spectroscopy, electrochemical impedance spectroscopy and polarization measurements. Incorporation of surface modified TiO2 nanoparticles in epoxy resin caused increase of glass transition temperature and decrease of the water vapor permeability of epoxy resin. The water vapor transmission rate of epoxy/TiO2 nanocomposites was reduced with increasing hydrophobic part chain length of gallate ligand. Dielectric constant of examined nanocomposites was influenced by gallate used for the modification of TiO2 nanoparticles. The nanocomposites have better anticorrosive properties than pure epoxy resin, because the surface modified TiO2 nanoparticles react as oxygen scavengers, which inhibit steel corrosion by cathodic mechanism. (C) 2014 Elsevier Ltd. All rights reserved.",
journal = "Materials and Design",
title = "Improvement of epoxy resin properties by incorporation of TiO2 nanoparticles surface modified with gallic acid esters",
volume = "62",
pages = "158-167",
doi = "10.1016/j.matdes.2014.05.015"
}
Radoman, T. S., Džunuzović, J. V., Jeremić, K. B., Grgur, B. N., Miličević, D. S., Popović, I. G.,& Džunuzović, E. S.. (2014). Improvement of epoxy resin properties by incorporation of TiO2 nanoparticles surface modified with gallic acid esters. in Materials and Design, 62, 158-167.
https://doi.org/10.1016/j.matdes.2014.05.015
Radoman TS, Džunuzović JV, Jeremić KB, Grgur BN, Miličević DS, Popović IG, Džunuzović ES. Improvement of epoxy resin properties by incorporation of TiO2 nanoparticles surface modified with gallic acid esters. in Materials and Design. 2014;62:158-167.
doi:10.1016/j.matdes.2014.05.015 .
Radoman, Tijana S., Džunuzović, Jasna V., Jeremić, Katarina B., Grgur, Branimir N., Miličević, Dejan S., Popović, Ivanka G., Džunuzović, Enis S., "Improvement of epoxy resin properties by incorporation of TiO2 nanoparticles surface modified with gallic acid esters" in Materials and Design, 62 (2014):158-167,
https://doi.org/10.1016/j.matdes.2014.05.015 . .
1
80
78
88

Characterization of in situ prepared nanocomposites of PS and TIO2 nanoparticles surface modified with alkyl gallates: Effect of alkyl chain length

Džunuzović, Enis S.; Džunuzović, Jasna V.; Radoman, Tijana S.; Marinović-Cincović, Milena; Nikolic, Ljubisa B.; Jeremić, Katarina B.; Nedeljković, Jovan

(2013)

TY  - JOUR
AU  - Džunuzović, Enis S.
AU  - Džunuzović, Jasna V.
AU  - Radoman, Tijana S.
AU  - Marinović-Cincović, Milena
AU  - Nikolic, Ljubisa B.
AU  - Jeremić, Katarina B.
AU  - Nedeljković, Jovan
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5322
AB  - Incorporation of surface modified TiO2 nanoparticles into polystyrene (PS) matrix was achieved by in situ bulk radical polymerization of styrene. The surface of TiO2 nanoparticles was modified with four amphiphilic esters of the gallic acid (octyl, decyl, lauryl and cetyl gallate), which have different lengths of hydrophobic alkyl chain (C8C16). FTIR and UV-Vis spectroscopy measurements confirmed the formation of a charge transfer complex between surface Ti atoms and gallic esters. Microstructural characterization of the synthesized nanocomposites revealed that the best dispersion of TiO2 nanoparticles in PS was achieved when the TiO2 surface was modified with octyl gallate. The presence of surface modified TiO2 nanoparticles by different alkyl gallates does not have an influence on the molecular weight and glass transition temperature of PS matrix. On the other hand, thermal and thermo-oxidative stability of PS were significantly improved by incorporation of surface modified TiO2 nanoparticles. The most pronounced improvement of thermal and thermo-oxidative stability was observed for TiO2 nanoparticles surface modified with octyl gallate. POLYM. COMPOS., 2013. (c) 2013 Society of Plastics Engineers
T2  - Polymer Composites
T1  - Characterization of in situ prepared nanocomposites of PS and TIO2 nanoparticles surface modified with alkyl gallates: Effect of alkyl chain length
VL  - 34
IS  - 3
SP  - 399
EP  - 407
DO  - 10.1002/pc.22423
ER  - 
@article{
author = "Džunuzović, Enis S. and Džunuzović, Jasna V. and Radoman, Tijana S. and Marinović-Cincović, Milena and Nikolic, Ljubisa B. and Jeremić, Katarina B. and Nedeljković, Jovan",
year = "2013",
abstract = "Incorporation of surface modified TiO2 nanoparticles into polystyrene (PS) matrix was achieved by in situ bulk radical polymerization of styrene. The surface of TiO2 nanoparticles was modified with four amphiphilic esters of the gallic acid (octyl, decyl, lauryl and cetyl gallate), which have different lengths of hydrophobic alkyl chain (C8C16). FTIR and UV-Vis spectroscopy measurements confirmed the formation of a charge transfer complex between surface Ti atoms and gallic esters. Microstructural characterization of the synthesized nanocomposites revealed that the best dispersion of TiO2 nanoparticles in PS was achieved when the TiO2 surface was modified with octyl gallate. The presence of surface modified TiO2 nanoparticles by different alkyl gallates does not have an influence on the molecular weight and glass transition temperature of PS matrix. On the other hand, thermal and thermo-oxidative stability of PS were significantly improved by incorporation of surface modified TiO2 nanoparticles. The most pronounced improvement of thermal and thermo-oxidative stability was observed for TiO2 nanoparticles surface modified with octyl gallate. POLYM. COMPOS., 2013. (c) 2013 Society of Plastics Engineers",
journal = "Polymer Composites",
title = "Characterization of in situ prepared nanocomposites of PS and TIO2 nanoparticles surface modified with alkyl gallates: Effect of alkyl chain length",
volume = "34",
number = "3",
pages = "399-407",
doi = "10.1002/pc.22423"
}
Džunuzović, E. S., Džunuzović, J. V., Radoman, T. S., Marinović-Cincović, M., Nikolic, L. B., Jeremić, K. B.,& Nedeljković, J.. (2013). Characterization of in situ prepared nanocomposites of PS and TIO2 nanoparticles surface modified with alkyl gallates: Effect of alkyl chain length. in Polymer Composites, 34(3), 399-407.
https://doi.org/10.1002/pc.22423
Džunuzović ES, Džunuzović JV, Radoman TS, Marinović-Cincović M, Nikolic LB, Jeremić KB, Nedeljković J. Characterization of in situ prepared nanocomposites of PS and TIO2 nanoparticles surface modified with alkyl gallates: Effect of alkyl chain length. in Polymer Composites. 2013;34(3):399-407.
doi:10.1002/pc.22423 .
Džunuzović, Enis S., Džunuzović, Jasna V., Radoman, Tijana S., Marinović-Cincović, Milena, Nikolic, Ljubisa B., Jeremić, Katarina B., Nedeljković, Jovan, "Characterization of in situ prepared nanocomposites of PS and TIO2 nanoparticles surface modified with alkyl gallates: Effect of alkyl chain length" in Polymer Composites, 34, no. 3 (2013):399-407,
https://doi.org/10.1002/pc.22423 . .
11
10
12

Structure-Property Correlation Study of Novel Poly(urethane-ester-siloxane) Networks

Pergal, Marija V.; Džunuzović, Jasna V.; Poreba, Rafal; Steinhart, Milos; Pergal, Miodrag M.; Vodnik, Vesna; Spirkova, Milena

(2013)

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 . .
13
13
15

Anisotropic silver nanoparticles as filler for the formation of hybrid nanocomposites

Vodnik, Vesna; Šaponjić, Zoran; Džunuzović, Jasna V.; Bogdanović, Una; Mitrić, Miodrag; Nedeljković, Jovan

(2013)

TY  - JOUR
AU  - Vodnik, Vesna
AU  - Šaponjić, Zoran
AU  - Džunuzović, Jasna V.
AU  - Bogdanović, Una
AU  - Mitrić, Miodrag
AU  - Nedeljković, Jovan
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5277
AB  - Prismatic and plate-like silver nanoparticles (Ag NPs) were synthesized according to the seed-mediated method. These particles were used as precursors for preparation of homogenous, transparent and colored Ag/poly(vinyl alcohol) (PVA) nanocomposite films with different concentrations of Ag by solution-casting technique. Optical and structural characterization of these nanocomposites includes UV-visible spectroscopy, X-ray diffraction (XRD), FTIR spectroscopy and SEM measurements. Further, the effect of embedded nanoparticles on the thermal properties of the PVA matrix was studied. The value of the glass transition temperature of polymer is found to increase after embedding Ag NPs. Comparison of thermal properties of pure PVA and nanocomposite films showed that the thermo-oxidative stability of polymer slightly increased in the presence of Ag NPs. Furthermore, the effect of the Ag NPs on the crystallinity of polymer was also observed. (C) 2012 Elsevier Ltd. All rights reserved.
T2  - Materials Research Bulletin
T1  - Anisotropic silver nanoparticles as filler for the formation of hybrid nanocomposites
VL  - 48
IS  - 1
SP  - 52
EP  - 57
DO  - 10.1016/j.materresbull.2012.09.059
ER  - 
@article{
author = "Vodnik, Vesna and Šaponjić, Zoran and Džunuzović, Jasna V. and Bogdanović, Una and Mitrić, Miodrag and Nedeljković, Jovan",
year = "2013",
abstract = "Prismatic and plate-like silver nanoparticles (Ag NPs) were synthesized according to the seed-mediated method. These particles were used as precursors for preparation of homogenous, transparent and colored Ag/poly(vinyl alcohol) (PVA) nanocomposite films with different concentrations of Ag by solution-casting technique. Optical and structural characterization of these nanocomposites includes UV-visible spectroscopy, X-ray diffraction (XRD), FTIR spectroscopy and SEM measurements. Further, the effect of embedded nanoparticles on the thermal properties of the PVA matrix was studied. The value of the glass transition temperature of polymer is found to increase after embedding Ag NPs. Comparison of thermal properties of pure PVA and nanocomposite films showed that the thermo-oxidative stability of polymer slightly increased in the presence of Ag NPs. Furthermore, the effect of the Ag NPs on the crystallinity of polymer was also observed. (C) 2012 Elsevier Ltd. All rights reserved.",
journal = "Materials Research Bulletin",
title = "Anisotropic silver nanoparticles as filler for the formation of hybrid nanocomposites",
volume = "48",
number = "1",
pages = "52-57",
doi = "10.1016/j.materresbull.2012.09.059"
}
Vodnik, V., Šaponjić, Z., Džunuzović, J. V., Bogdanović, U., Mitrić, M.,& Nedeljković, J.. (2013). Anisotropic silver nanoparticles as filler for the formation of hybrid nanocomposites. in Materials Research Bulletin, 48(1), 52-57.
https://doi.org/10.1016/j.materresbull.2012.09.059
Vodnik V, Šaponjić Z, Džunuzović JV, Bogdanović U, Mitrić M, Nedeljković J. Anisotropic silver nanoparticles as filler for the formation of hybrid nanocomposites. in Materials Research Bulletin. 2013;48(1):52-57.
doi:10.1016/j.materresbull.2012.09.059 .
Vodnik, Vesna, Šaponjić, Zoran, Džunuzović, Jasna V., Bogdanović, Una, Mitrić, Miodrag, Nedeljković, Jovan, "Anisotropic silver nanoparticles as filler for the formation of hybrid nanocomposites" in Materials Research Bulletin, 48, no. 1 (2013):52-57,
https://doi.org/10.1016/j.materresbull.2012.09.059 . .
17
19
19

Influence of surface modified TiO2 nanoparticles by gallates on the properties of PMMA/TiO2 nanocomposites

Džunuzović, Enis S.; Džunuzović, Jasna V.; Marinković, Aleksandar D.; Marinović-Cincović, Milena; Jeremić, Katarina B.; Nedeljković, Jovan

(2012)

TY  - JOUR
AU  - Džunuzović, Enis S.
AU  - Džunuzović, Jasna V.
AU  - Marinković, Aleksandar D.
AU  - Marinović-Cincović, Milena
AU  - Jeremić, Katarina B.
AU  - Nedeljković, Jovan
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5206
AB  - Nanocomposites based on poly(methyl methacrylate) (PMMA) and TiO2 nanoparticles were synthesized by in situ radical polymerization of MMA in solution. The surface of TiO2 nanoparticles was modified with four gallic acid esters (octyl, decyl, lauryl and cetyl gallate). The content of gallates present on the surface of TiO2, was calculated from the TGA results. The influence of length of hydrophobic tail of amphiphilic alkyl gallates on dispersability of surface modified TiO2 nanoparticles in PMMA matrix, the molecular weight and glass transition temperature of PMMA, as well as the thermal stability of the prepared PMMA/TiO2 nanocomposites in nitrogen and air was investigated. The influence of content of TiO2 nanoparticles on the properties of these nanocomposites was also examined. The formation of a charge transfer complex between the surface Ti atoms and the gallates was confirmed by FTIR and LIN/spectroscopy. TEM micrographs of the PMMA/TiO2 nanocomposites revealed that degree of TiO2 aggregation can be significantly lowered by increasing the length of aliphatic part of the used gallates. The molecular weight of PMMA slightly decreases with the increase of TiO2 content, indicating that used TiO2 nanoparticles act as radical scavengers during the polymerization of MMA. The presence of surface modified TiO2 nanoparticles do not have an influence on the mobility of PMMA chain segments leading to the same values of glass transition temperature for all investigated samples. Thermal and thermo-oxidative stability of the PMMA matrix are improved by introducing TiO2 nanoparticles modified with gallates. (C) 2012 Elsevier Ltd. All rights reserved.
T2  - European Polymer Journal
T1  - Influence of surface modified TiO2 nanoparticles by gallates on the properties of PMMA/TiO2 nanocomposites
VL  - 48
IS  - 8
SP  - 1385
EP  - 1393
DO  - 10.1016/j.eurpolymj.2012.05.017
ER  - 
@article{
author = "Džunuzović, Enis S. and Džunuzović, Jasna V. and Marinković, Aleksandar D. and Marinović-Cincović, Milena and Jeremić, Katarina B. and Nedeljković, Jovan",
year = "2012",
abstract = "Nanocomposites based on poly(methyl methacrylate) (PMMA) and TiO2 nanoparticles were synthesized by in situ radical polymerization of MMA in solution. The surface of TiO2 nanoparticles was modified with four gallic acid esters (octyl, decyl, lauryl and cetyl gallate). The content of gallates present on the surface of TiO2, was calculated from the TGA results. The influence of length of hydrophobic tail of amphiphilic alkyl gallates on dispersability of surface modified TiO2 nanoparticles in PMMA matrix, the molecular weight and glass transition temperature of PMMA, as well as the thermal stability of the prepared PMMA/TiO2 nanocomposites in nitrogen and air was investigated. The influence of content of TiO2 nanoparticles on the properties of these nanocomposites was also examined. The formation of a charge transfer complex between the surface Ti atoms and the gallates was confirmed by FTIR and LIN/spectroscopy. TEM micrographs of the PMMA/TiO2 nanocomposites revealed that degree of TiO2 aggregation can be significantly lowered by increasing the length of aliphatic part of the used gallates. The molecular weight of PMMA slightly decreases with the increase of TiO2 content, indicating that used TiO2 nanoparticles act as radical scavengers during the polymerization of MMA. The presence of surface modified TiO2 nanoparticles do not have an influence on the mobility of PMMA chain segments leading to the same values of glass transition temperature for all investigated samples. Thermal and thermo-oxidative stability of the PMMA matrix are improved by introducing TiO2 nanoparticles modified with gallates. (C) 2012 Elsevier Ltd. All rights reserved.",
journal = "European Polymer Journal",
title = "Influence of surface modified TiO2 nanoparticles by gallates on the properties of PMMA/TiO2 nanocomposites",
volume = "48",
number = "8",
pages = "1385-1393",
doi = "10.1016/j.eurpolymj.2012.05.017"
}
Džunuzović, E. S., Džunuzović, J. V., Marinković, A. D., Marinović-Cincović, M., Jeremić, K. B.,& Nedeljković, J.. (2012). Influence of surface modified TiO2 nanoparticles by gallates on the properties of PMMA/TiO2 nanocomposites. in European Polymer Journal, 48(8), 1385-1393.
https://doi.org/10.1016/j.eurpolymj.2012.05.017
Džunuzović ES, Džunuzović JV, Marinković AD, Marinović-Cincović M, Jeremić KB, Nedeljković J. Influence of surface modified TiO2 nanoparticles by gallates on the properties of PMMA/TiO2 nanocomposites. in European Polymer Journal. 2012;48(8):1385-1393.
doi:10.1016/j.eurpolymj.2012.05.017 .
Džunuzović, Enis S., Džunuzović, Jasna V., Marinković, Aleksandar D., Marinović-Cincović, Milena, Jeremić, Katarina B., Nedeljković, Jovan, "Influence of surface modified TiO2 nanoparticles by gallates on the properties of PMMA/TiO2 nanocomposites" in European Polymer Journal, 48, no. 8 (2012):1385-1393,
https://doi.org/10.1016/j.eurpolymj.2012.05.017 . .
37
37
42

Silver/polystyrene nanocomposites: Optical and thermal properties

Vodnik, Vesna; Božanić, Dušan K.; Džunuzović, Jasna V.; Vukoje, Ivana D.; Nedeljković, Jovan

(2012)

TY  - JOUR
AU  - Vodnik, Vesna
AU  - Božanić, Dušan K.
AU  - Džunuzović, Jasna V.
AU  - Vukoje, Ivana D.
AU  - Nedeljković, Jovan
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4801
AB  - Nanocomposites consisted of different quantities of silver (Ag) nanoparticles incorporated in a polystyrene (PS) matrix have been prepared by solution mixing method. Transmission electron microscopy was applied to determine the size distribution of the Ag nanoparticles, while the morphology of fractured surfaces of pure PS and Ag/PS nanocomposites was examined by scanning electron microscopy. Absorption spectra of nanocomposites were compared with theoretically calculated spectra based on the Maxwell-Garnett effective medium theory. The influence of Ag content on thermal properties of Ag/PS nanocomposites was investigated by thermogravimetric analysis and differential scanning calorimetry. Thermal and thermo-oxidative stability of the host polymer were improved by introduction of silver nanoparticles. The glass transition temperature of the prepared Ag/PS nanocomposites was lower in comparison with the neat PS and decreased with the increase of the Ag content due to the very weak interfacial interaction between Ag nanoparticles and polymer matrix. POLYM. COMPOS., 2012. (c) 2012 Society of Plastics Engineers
T2  - Polymer Composites
T1  - Silver/polystyrene nanocomposites: Optical and thermal properties
VL  - 33
IS  - 5
SP  - 782
EP  - 788
DO  - 10.1002/pc.22207
ER  - 
@article{
author = "Vodnik, Vesna and Božanić, Dušan K. and Džunuzović, Jasna V. and Vukoje, Ivana D. and Nedeljković, Jovan",
year = "2012",
abstract = "Nanocomposites consisted of different quantities of silver (Ag) nanoparticles incorporated in a polystyrene (PS) matrix have been prepared by solution mixing method. Transmission electron microscopy was applied to determine the size distribution of the Ag nanoparticles, while the morphology of fractured surfaces of pure PS and Ag/PS nanocomposites was examined by scanning electron microscopy. Absorption spectra of nanocomposites were compared with theoretically calculated spectra based on the Maxwell-Garnett effective medium theory. The influence of Ag content on thermal properties of Ag/PS nanocomposites was investigated by thermogravimetric analysis and differential scanning calorimetry. Thermal and thermo-oxidative stability of the host polymer were improved by introduction of silver nanoparticles. The glass transition temperature of the prepared Ag/PS nanocomposites was lower in comparison with the neat PS and decreased with the increase of the Ag content due to the very weak interfacial interaction between Ag nanoparticles and polymer matrix. POLYM. COMPOS., 2012. (c) 2012 Society of Plastics Engineers",
journal = "Polymer Composites",
title = "Silver/polystyrene nanocomposites: Optical and thermal properties",
volume = "33",
number = "5",
pages = "782-788",
doi = "10.1002/pc.22207"
}
Vodnik, V., Božanić, D. K., Džunuzović, J. V., Vukoje, I. D.,& Nedeljković, J.. (2012). Silver/polystyrene nanocomposites: Optical and thermal properties. in Polymer Composites, 33(5), 782-788.
https://doi.org/10.1002/pc.22207
Vodnik V, Božanić DK, Džunuzović JV, Vukoje ID, Nedeljković J. Silver/polystyrene nanocomposites: Optical and thermal properties. in Polymer Composites. 2012;33(5):782-788.
doi:10.1002/pc.22207 .
Vodnik, Vesna, Božanić, Dušan K., Džunuzović, Jasna V., Vukoje, Ivana D., Nedeljković, Jovan, "Silver/polystyrene nanocomposites: Optical and thermal properties" in Polymer Composites, 33, no. 5 (2012):782-788,
https://doi.org/10.1002/pc.22207 . .
1
19
17
18

Surface plasmon resonance of Ag organosols: Experimental and theoretical investigations

Vukoje, Ivana D.; Božanić, Dušan K.; Džunuzović, Jasna V.; Bogdanović, Una; Vodnik, Vesna

(2012)

TY  - JOUR
AU  - Vukoje, Ivana D.
AU  - Božanić, Dušan K.
AU  - Džunuzović, Jasna V.
AU  - Bogdanović, Una
AU  - Vodnik, Vesna
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5337
AB  - The aim of this study was to investigate and compare the changes in surface plasmon resonance (SPR) of silver (Ag) hydrosol and organosols obtained by experimental and theoretical approaches. Silver nanoparticles (Ag NPs) of 5 +/- 1.5 nm in diameter were prepared in water by reduction of silver nitrate with sodium borohydride. Nanoparticles were subsequently transferred into different organic solvents (chloroform, hexane, toluene, 1,2-dichlorobenzene) using oleylamine as a transfer agent. These solvents were chosen because of the differences in their refractive indices. Using UV-Vis absorption spectrophotometry and transmission electron microscopy (TEM), we confirmed that there were no shape and size changes of the nanoparticles upon the transfer to the organic phase. The absorption spectra of the obtained Ag organosols showed changes only in the position of the SPR band depending on the dielectric property of the used solvent. To analyze these changes, absorption spectra were modelled using Mie theory for small spherical particles. The experimental and theoretical resonance values were compared with those predicted by the Drude model and its limitations in the analysis of absorption behavior of Ag NPs in organic solvents were briefly discussed.
T2  - Hemijska industrija
T1  - Surface plasmon resonance of Ag organosols: Experimental and theoretical investigations
VL  - 66
IS  - 6
SP  - 805
EP  - 812
DO  - 10.2298/HEMIND120112028V
ER  - 
@article{
author = "Vukoje, Ivana D. and Božanić, Dušan K. and Džunuzović, Jasna V. and Bogdanović, Una and Vodnik, Vesna",
year = "2012",
abstract = "The aim of this study was to investigate and compare the changes in surface plasmon resonance (SPR) of silver (Ag) hydrosol and organosols obtained by experimental and theoretical approaches. Silver nanoparticles (Ag NPs) of 5 +/- 1.5 nm in diameter were prepared in water by reduction of silver nitrate with sodium borohydride. Nanoparticles were subsequently transferred into different organic solvents (chloroform, hexane, toluene, 1,2-dichlorobenzene) using oleylamine as a transfer agent. These solvents were chosen because of the differences in their refractive indices. Using UV-Vis absorption spectrophotometry and transmission electron microscopy (TEM), we confirmed that there were no shape and size changes of the nanoparticles upon the transfer to the organic phase. The absorption spectra of the obtained Ag organosols showed changes only in the position of the SPR band depending on the dielectric property of the used solvent. To analyze these changes, absorption spectra were modelled using Mie theory for small spherical particles. The experimental and theoretical resonance values were compared with those predicted by the Drude model and its limitations in the analysis of absorption behavior of Ag NPs in organic solvents were briefly discussed.",
journal = "Hemijska industrija",
title = "Surface plasmon resonance of Ag organosols: Experimental and theoretical investigations",
volume = "66",
number = "6",
pages = "805-812",
doi = "10.2298/HEMIND120112028V"
}
Vukoje, I. D., Božanić, D. K., Džunuzović, J. V., Bogdanović, U.,& Vodnik, V.. (2012). Surface plasmon resonance of Ag organosols: Experimental and theoretical investigations. in Hemijska industrija, 66(6), 805-812.
https://doi.org/10.2298/HEMIND120112028V
Vukoje ID, Božanić DK, Džunuzović JV, Bogdanović U, Vodnik V. Surface plasmon resonance of Ag organosols: Experimental and theoretical investigations. in Hemijska industrija. 2012;66(6):805-812.
doi:10.2298/HEMIND120112028V .
Vukoje, Ivana D., Božanić, Dušan K., Džunuzović, Jasna V., Bogdanović, Una, Vodnik, Vesna, "Surface plasmon resonance of Ag organosols: Experimental and theoretical investigations" in Hemijska industrija, 66, no. 6 (2012):805-812,
https://doi.org/10.2298/HEMIND120112028V . .
2
2
2

Investigation of the Morphology and Surface Properties of Crosslinked Poly(Urethane-Ester-Siloxane)S

Džunuzović, Jasna V.; Pergal, Marija V.; Vodnik, Vesna; Spirkova, Milena; Poreba, Rafal; Jovanovic, Slobodan

(2012)

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 . .
1
1
1

Analysis of dynamic mechanical, thermal and surface properties of poly(urethane-ester-siloxane) networks based on hyperbranched polyester

Džunuzović, Jasna V.; Pergal, Marija V.; Poreba, Rafal; Vodnik, Vesna; Simonović, Branislav R.; Spirkova, Milena; Jovanovic, Slobodan

(2012)

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 . .
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22

Thermal properties of poly(urethane-ester-siloxane)s based on hyperbranched polyester

Pergal, Marija V.; Džunuzović, Jasna V.; Kićanović, Miodrag; Vodnik, Vesna; Pergal, Miodrag M.; Jovanović, Svetlana P.

(2011)

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 . .
7
10
11

Synthesis and swelling behavior of polyurethane networks based on hyperbranched polymer

Džunuzović, Jasna V.; Pergal, Marija V.; Jovanovic, Slobodan; Vodnik, Vesna

(2011)

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 . .
9
9
13

Influence of the Way of Synthesis of Poly(Methyl Methacrylate) in the Presence of Surface Modified Tio2 Nanoparticles on the Properties of Obtained Nanocomposites

Džunuzović, Enis S.; Marinović-Cincović, Milena; Džunuzović, Jasna V.; Jeremić, Katarina B.; Nedeljković, Jovan

(2010)

TY  - JOUR
AU  - Džunuzović, Enis S.
AU  - Marinović-Cincović, Milena
AU  - Džunuzović, Jasna V.
AU  - Jeremić, Katarina B.
AU  - Nedeljković, Jovan
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4221
AB  - Incorporation of inorganic nanoparticles can significantly affect the properties of the polymer matrix. The properties of polymer nanocomposites depend on the type of incorporated nanoparticles, their size and shape, their concentration, and interactions with the polymer matrix. Homogeneity of polymer nanocomposites is influenced very much by the preparation method. In this study, TiO2 nanoparticles surface modified with 6-palmitate ascorbic acid (6-PAA) were encapsulated in poly(methyl methacrylate) (PMMA) by in situ radical polymerization of methyl methacrylate initiated by 2,2-azobisisobutyronitrile (AIBN). The surface modification of the TiO2 nanoparticles was achieved by the formation of a charge transfer complex between TiO2 nanoparticles and 6-palmitate ascorbic acid. The radical polymerization of MMA in the presence of TiO2-PAA nanoparticles was conducted in solution (PMMA/TiO2-PAA-R), in bulk (PMMA/TiO2-PAA-M) or in suspension (PMMA/TiO2-PAA-S). The main purpose of this study was to investigate the influence of the preparation method on the molar masses and thermal properties of PMMA/TiO2-PAA nanocomposite. It was obtained that molar masses of PMMA extracted from the composites had smaller values compared to molar masses of pure PMMA synthesized in the same manner, which indicated that TiO2-PAA nanoparticles affected the reaction of termination. Thermal properties were investigated by DSC and TGA. The values of glass transition temperature, T-g, were influenced by the way the radical polymerization was conducted, even in the case of the pure PMMA. The Tp(g) of composite samples was always smaller than the value of the corresponding PMMA sample and the smallest value was obtained for PMMA/TiO2- PAA-M since they contained the largest amount of low molar mass residue. The TGA results showed that thermal and thermooxidative stability of polymer composites obtained in solution and in suspension was better than for the pure PMMA obtained in the same way.
T2  - Hemijska industrija
T1  - Influence of the Way of Synthesis of Poly(Methyl Methacrylate) in the Presence of Surface Modified Tio2 Nanoparticles on the Properties of Obtained Nanocomposites
VL  - 64
IS  - 6
SP  - 473
EP  - 489
DO  - 10.2298/HEMIND100923059D
ER  - 
@article{
author = "Džunuzović, Enis S. and Marinović-Cincović, Milena and Džunuzović, Jasna V. and Jeremić, Katarina B. and Nedeljković, Jovan",
year = "2010",
abstract = "Incorporation of inorganic nanoparticles can significantly affect the properties of the polymer matrix. The properties of polymer nanocomposites depend on the type of incorporated nanoparticles, their size and shape, their concentration, and interactions with the polymer matrix. Homogeneity of polymer nanocomposites is influenced very much by the preparation method. In this study, TiO2 nanoparticles surface modified with 6-palmitate ascorbic acid (6-PAA) were encapsulated in poly(methyl methacrylate) (PMMA) by in situ radical polymerization of methyl methacrylate initiated by 2,2-azobisisobutyronitrile (AIBN). The surface modification of the TiO2 nanoparticles was achieved by the formation of a charge transfer complex between TiO2 nanoparticles and 6-palmitate ascorbic acid. The radical polymerization of MMA in the presence of TiO2-PAA nanoparticles was conducted in solution (PMMA/TiO2-PAA-R), in bulk (PMMA/TiO2-PAA-M) or in suspension (PMMA/TiO2-PAA-S). The main purpose of this study was to investigate the influence of the preparation method on the molar masses and thermal properties of PMMA/TiO2-PAA nanocomposite. It was obtained that molar masses of PMMA extracted from the composites had smaller values compared to molar masses of pure PMMA synthesized in the same manner, which indicated that TiO2-PAA nanoparticles affected the reaction of termination. Thermal properties were investigated by DSC and TGA. The values of glass transition temperature, T-g, were influenced by the way the radical polymerization was conducted, even in the case of the pure PMMA. The Tp(g) of composite samples was always smaller than the value of the corresponding PMMA sample and the smallest value was obtained for PMMA/TiO2- PAA-M since they contained the largest amount of low molar mass residue. The TGA results showed that thermal and thermooxidative stability of polymer composites obtained in solution and in suspension was better than for the pure PMMA obtained in the same way.",
journal = "Hemijska industrija",
title = "Influence of the Way of Synthesis of Poly(Methyl Methacrylate) in the Presence of Surface Modified Tio2 Nanoparticles on the Properties of Obtained Nanocomposites",
volume = "64",
number = "6",
pages = "473-489",
doi = "10.2298/HEMIND100923059D"
}
Džunuzović, E. S., Marinović-Cincović, M., Džunuzović, J. V., Jeremić, K. B.,& Nedeljković, J.. (2010). Influence of the Way of Synthesis of Poly(Methyl Methacrylate) in the Presence of Surface Modified Tio2 Nanoparticles on the Properties of Obtained Nanocomposites. in Hemijska industrija, 64(6), 473-489.
https://doi.org/10.2298/HEMIND100923059D
Džunuzović ES, Marinović-Cincović M, Džunuzović JV, Jeremić KB, Nedeljković J. Influence of the Way of Synthesis of Poly(Methyl Methacrylate) in the Presence of Surface Modified Tio2 Nanoparticles on the Properties of Obtained Nanocomposites. in Hemijska industrija. 2010;64(6):473-489.
doi:10.2298/HEMIND100923059D .
Džunuzović, Enis S., Marinović-Cincović, Milena, Džunuzović, Jasna V., Jeremić, Katarina B., Nedeljković, Jovan, "Influence of the Way of Synthesis of Poly(Methyl Methacrylate) in the Presence of Surface Modified Tio2 Nanoparticles on the Properties of Obtained Nanocomposites" in Hemijska industrija, 64, no. 6 (2010):473-489,
https://doi.org/10.2298/HEMIND100923059D . .
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