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 . .

TY  - JOUR
AU  - Gulicovski, Jelena J.
AU  - Čerović, Ljiljana S.
AU  - Milonjić, Slobodan K.
AU  - Popović, Ivanka G.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3530
AB  - Itaconic acid, IA (C5H6O4), was investigated as a potential flocculant for the aqueous processing of alumina powders. The adsorption of IA, as a function of its concentration and pH value of the solution, onto the alumina surface was studied by the solution depletion method. The stability of the suspensions in the presence of itaconic acid was evaluated in light of the surface charge of the alumina powder used, the degree of dissociation of IA, as well as the sedimentation behavior and rheology of the suspensions. It was found that the adsorption process is extremely pH dependent; the maximum adsorption of IA onto alumina surface occurring at a pH close to the value of the first IA dissociation constant, pK(a1). Also, IA does not influence the value of the point of zero charge of alumina. It was shown that IA represents an efficient flocculant for concentrated acidic alumina suspensions.
T2  - Journal of the Serbian Chemical Society
T1  - Adsorption of itaconic acid from aqueous solutions onto alumina
VL  - 73
IS  - 8-9
SP  - 825
EP  - 834
DO  - 10.2298/JSC0809825G
ER  - 

@article{
author = "Gulicovski, Jelena J. and Čerović, Ljiljana S. and Milonjić, Slobodan K. and Popović, Ivanka G.",
year = "2008",
abstract = "Itaconic acid, IA (C5H6O4), was investigated as a potential flocculant for the aqueous processing of alumina powders. The adsorption of IA, as a function of its concentration and pH value of the solution, onto the alumina surface was studied by the solution depletion method. The stability of the suspensions in the presence of itaconic acid was evaluated in light of the surface charge of the alumina powder used, the degree of dissociation of IA, as well as the sedimentation behavior and rheology of the suspensions. It was found that the adsorption process is extremely pH dependent; the maximum adsorption of IA onto alumina surface occurring at a pH close to the value of the first IA dissociation constant, pK(a1). Also, IA does not influence the value of the point of zero charge of alumina. It was shown that IA represents an efficient flocculant for concentrated acidic alumina suspensions.",
journal = "Journal of the Serbian Chemical Society",
title = "Adsorption of itaconic acid from aqueous solutions onto alumina",
volume = "73",
number = "8-9",
pages = "825-834",
doi = "10.2298/JSC0809825G"
}

Gulicovski, J. J., Čerović, L. S., Milonjić, S. K.,& Popović, I. G.. (2008). Adsorption of itaconic acid from aqueous solutions onto alumina. in Journal of the Serbian Chemical Society, 73(8-9), 825-834.
https://doi.org/10.2298/JSC0809825G

Gulicovski JJ, Čerović LS, Milonjić SK, Popović IG. Adsorption of itaconic acid from aqueous solutions onto alumina. in Journal of the Serbian Chemical Society. 2008;73(8-9):825-834.
doi:10.2298/JSC0809825G .

Gulicovski, Jelena J., Čerović, Ljiljana S., Milonjić, Slobodan K., Popović, Ivanka G., "Adsorption of itaconic acid from aqueous solutions onto alumina" in Journal of the Serbian Chemical Society, 73, no. 8-9 (2008):825-834,
https://doi.org/10.2298/JSC0809825G . .

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 . .

TY  - JOUR
AU  - Pepić, Dragana
AU  - Radoičić, Marija
AU  - Nikolić, Marija
AU  - Đonlagić, Jasna
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12271
AB  - Novel poly(ester-ether)s based on poly(butylene succinate) (PBS) as the hard segments and 30 mass % of poly(propylene oxide) (PPO) as the soft segments were synthesized with varying amount of the antioxidant (N,N'-diphenyl-p-phenylenediamine, DPPD). The influences of the addition of DPPD and the impact of post-synthetic treatment by precipitation on the molecular structure, thermal and physical properties, as well as on the storage stability of the biodegradable aliphatic copolyesters, were investigated. The structure and composition of the copolymers were determined by means of 1H-NMR spectroscopy. The molecular weight and polydispersity of the poly(ester-ether)s were evaluated from solution viscosity and GPC measurements. The thermal properties and stability were evaluated, respecttively, by means of DSC and non-isothermal thermogravimetry in an inert nitrogen atmosphere. The biodegradability potential of the polymers was studied in hydrolytic and enzymatic degradation tests with Candida cylindracea lipase by monitoring the weight loss of polymer films after incubation. The weight losses of the samples increased with time and were in the range from 1 to 5 mass % after 4 weeks. GPC analysis confirmed that there were changes in the molecular weight of the copolyesters during both hydrolytic and enzymatic degradation tests, leading to the conclusion that the degradation mechanism of poly(butylene succinate)s modified with PPO occurred through surface erosion and bulk degradation.
T2  - Journal of the Serbian Chemical Society
T1  - The influence of antioxidant and post-synthetic treatment on the properties of biodegradable poly(butylene succinate)s modified with poly(propylene oxide)
T1  - Uticaj antioksiodansa i načina izdvajanja polimera na svojstva biodegradabilnih poli(butilen sukcinata) modifikovanih poli(propilenoksidom)
VL  - 72
IS  - 12
SP  - 1515
EP  - 1531
DO  - 10.2298/JSC0712515P
ER  - 

@article{
author = "Pepić, Dragana and Radoičić, Marija and Nikolić, Marija and Đonlagić, Jasna",
year = "2007",
abstract = "Novel poly(ester-ether)s based on poly(butylene succinate) (PBS) as the hard segments and 30 mass % of poly(propylene oxide) (PPO) as the soft segments were synthesized with varying amount of the antioxidant (N,N'-diphenyl-p-phenylenediamine, DPPD). The influences of the addition of DPPD and the impact of post-synthetic treatment by precipitation on the molecular structure, thermal and physical properties, as well as on the storage stability of the biodegradable aliphatic copolyesters, were investigated. The structure and composition of the copolymers were determined by means of 1H-NMR spectroscopy. The molecular weight and polydispersity of the poly(ester-ether)s were evaluated from solution viscosity and GPC measurements. The thermal properties and stability were evaluated, respecttively, by means of DSC and non-isothermal thermogravimetry in an inert nitrogen atmosphere. The biodegradability potential of the polymers was studied in hydrolytic and enzymatic degradation tests with Candida cylindracea lipase by monitoring the weight loss of polymer films after incubation. The weight losses of the samples increased with time and were in the range from 1 to 5 mass % after 4 weeks. GPC analysis confirmed that there were changes in the molecular weight of the copolyesters during both hydrolytic and enzymatic degradation tests, leading to the conclusion that the degradation mechanism of poly(butylene succinate)s modified with PPO occurred through surface erosion and bulk degradation.",
journal = "Journal of the Serbian Chemical Society",
title = "The influence of antioxidant and post-synthetic treatment on the properties of biodegradable poly(butylene succinate)s modified with poly(propylene oxide), Uticaj antioksiodansa i načina izdvajanja polimera na svojstva biodegradabilnih poli(butilen sukcinata) modifikovanih poli(propilenoksidom)",
volume = "72",
number = "12",
pages = "1515-1531",
doi = "10.2298/JSC0712515P"
}

Pepić, D., Radoičić, M., Nikolić, M.,& Đonlagić, J.. (2007). The influence of antioxidant and post-synthetic treatment on the properties of biodegradable poly(butylene succinate)s modified with poly(propylene oxide). in Journal of the Serbian Chemical Society, 72(12), 1515-1531.
https://doi.org/10.2298/JSC0712515P

Pepić D, Radoičić M, Nikolić M, Đonlagić J. The influence of antioxidant and post-synthetic treatment on the properties of biodegradable poly(butylene succinate)s modified with poly(propylene oxide). in Journal of the Serbian Chemical Society. 2007;72(12):1515-1531.
doi:10.2298/JSC0712515P .

Pepić, Dragana, Radoičić, Marija, Nikolić, Marija, Đonlagić, Jasna, "The influence of antioxidant and post-synthetic treatment on the properties of biodegradable poly(butylene succinate)s modified with poly(propylene oxide)" in Journal of the Serbian Chemical Society, 72, no. 12 (2007):1515-1531,
https://doi.org/10.2298/JSC0712515P . .