TY  - JOUR
AU  - Mirković, Ilinka
AU  - Nikolić, Marija
AU  - Ostojić, Sanja
AU  - Maletaškić, Jelena
AU  - Petrović, Zoran
AU  - Đonlagić, Jasna
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9718
AB  - Semi-interpenetrating polymer networks (SIPN) based on thermo-responsive poly(N-isopropylacrylamide) (PNIPA) and water-soluble sodium salts of linear hyaluronic acid (Na-HA) were physically cross-linked with synthetic nanoclay (laponite XLG). PNIPA hydrogels with different cross-linking densities and Na-HA concentrations were synthesized by in situ free-radical redox polymerization. The structure and heterogeneity of the semi-IPN hydrogels were examined by SEM and XRD. The content of clay incorporated in the gel was determined by TGA. DSC measurements showed that volume phase transition temperature and its enthalpy varied with the clay and hyaluronic acid content. SIPN hydrogels containing negatively charged polyelectrolyte, Na-HA, exhibited higher Q(e) and faster deswelling rates than the corresponding PNIPA NC hydrogels. The presence of the anionic Na-HA polymer reduced the storage modulus, indicating a weakening of the hydrogel network structure, especially at lower clay contents. The nanocomposite hydrogels exhibited high tan delta values, which increased with increasing Na-HA content.
T2  - Journal of the Serbian Chemical Society
T1  - Thermo-responsive hydrogels based on poly(N-isopropyl- acrylamide) and hyaluronic acid cross-linked with nanoclays
VL  - 85
IS  - 9
SP  - 1197
EP  - 1221
DO  - 10.2298/JSC200109023M
ER  - 

@article{
author = "Mirković, Ilinka and Nikolić, Marija and Ostojić, Sanja and Maletaškić, Jelena and Petrović, Zoran and Đonlagić, Jasna",
year = "2020",
abstract = "Semi-interpenetrating polymer networks (SIPN) based on thermo-responsive poly(N-isopropylacrylamide) (PNIPA) and water-soluble sodium salts of linear hyaluronic acid (Na-HA) were physically cross-linked with synthetic nanoclay (laponite XLG). PNIPA hydrogels with different cross-linking densities and Na-HA concentrations were synthesized by in situ free-radical redox polymerization. The structure and heterogeneity of the semi-IPN hydrogels were examined by SEM and XRD. The content of clay incorporated in the gel was determined by TGA. DSC measurements showed that volume phase transition temperature and its enthalpy varied with the clay and hyaluronic acid content. SIPN hydrogels containing negatively charged polyelectrolyte, Na-HA, exhibited higher Q(e) and faster deswelling rates than the corresponding PNIPA NC hydrogels. The presence of the anionic Na-HA polymer reduced the storage modulus, indicating a weakening of the hydrogel network structure, especially at lower clay contents. The nanocomposite hydrogels exhibited high tan delta values, which increased with increasing Na-HA content.",
journal = "Journal of the Serbian Chemical Society",
title = "Thermo-responsive hydrogels based on poly(N-isopropyl- acrylamide) and hyaluronic acid cross-linked with nanoclays",
volume = "85",
number = "9",
pages = "1197-1221",
doi = "10.2298/JSC200109023M"
}

Mirković, I., Nikolić, M., Ostojić, S., Maletaškić, J., Petrović, Z.,& Đonlagić, J.. (2020). Thermo-responsive hydrogels based on poly(N-isopropyl- acrylamide) and hyaluronic acid cross-linked with nanoclays. in Journal of the Serbian Chemical Society, 85(9), 1197-1221.
https://doi.org/10.2298/JSC200109023M

Mirković I, Nikolić M, Ostojić S, Maletaškić J, Petrović Z, Đonlagić J. Thermo-responsive hydrogels based on poly(N-isopropyl- acrylamide) and hyaluronic acid cross-linked with nanoclays. in Journal of the Serbian Chemical Society. 2020;85(9):1197-1221.
doi:10.2298/JSC200109023M .

Mirković, Ilinka, Nikolić, Marija, Ostojić, Sanja, Maletaškić, Jelena, Petrović, Zoran, Đonlagić, Jasna, "Thermo-responsive hydrogels based on poly(N-isopropyl- acrylamide) and hyaluronic acid cross-linked with nanoclays" in Journal of the Serbian Chemical Society, 85, no. 9 (2020):1197-1221,
https://doi.org/10.2298/JSC200109023M . .

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 . .