TY  - JOUR
AU  - Pantić, Olga
AU  - Spasojević, Milica
AU  - Džunuzović, Enis
AU  - Nikolić, Marija S.
AU  - Savić, Sanja
AU  - Marković, Maja
AU  - Spasojević, Pavle M.
PY  - 2022
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5605
AB  - The scope of the present study was to prepare fully bio-based unsaturated polyester resins (UPRs) with comparable properties to the commercial formulations. The focus was set on the determination of the optimal prepolymer formulation using the same set of diacids (itaconic and succinic acid) and different diols (propylene glycol, isosorbide and neopentyl glycol) or its equimolar mixtures, keeping the fixed molar ratio of 1:1:2.1 in all feed compositions. Instead of commonly used styrene, bio-based dimethyl itaconate was used as a reactive diluent (RD). The rheology of the obtained resins was studied in detail. The effect of the used diol on structural (FTIR), thermal (DSC), thermomechanical (DMA), and mechanical (tensile) properties was explained. The properties of UPRs were found to be highly dependent on the diol used in the prepolymer formulation. The UPR with an equimolar ratio of propylene glycol and neopentyl glycol was shown to be the most promising candidate to compete with the commercial petroleum-based resins.
PB  - MDPI
T2  - Polymers
T1  - The Effect of Glycol Derivatives on the Properties of Bio-Based Unsaturated Polyesters
VL  - 14
IS  - 15
SP  - 2970
DO  - 10.3390/polym14152970
ER  - 

@article{
author = "Pantić, Olga and Spasojević, Milica and Džunuzović, Enis and Nikolić, Marija S. and Savić, Sanja and Marković, Maja and Spasojević, Pavle M.",
year = "2022",
abstract = "The scope of the present study was to prepare fully bio-based unsaturated polyester resins (UPRs) with comparable properties to the commercial formulations. The focus was set on the determination of the optimal prepolymer formulation using the same set of diacids (itaconic and succinic acid) and different diols (propylene glycol, isosorbide and neopentyl glycol) or its equimolar mixtures, keeping the fixed molar ratio of 1:1:2.1 in all feed compositions. Instead of commonly used styrene, bio-based dimethyl itaconate was used as a reactive diluent (RD). The rheology of the obtained resins was studied in detail. The effect of the used diol on structural (FTIR), thermal (DSC), thermomechanical (DMA), and mechanical (tensile) properties was explained. The properties of UPRs were found to be highly dependent on the diol used in the prepolymer formulation. The UPR with an equimolar ratio of propylene glycol and neopentyl glycol was shown to be the most promising candidate to compete with the commercial petroleum-based resins.",
publisher = "MDPI",
journal = "Polymers",
title = "The Effect of Glycol Derivatives on the Properties of Bio-Based Unsaturated Polyesters",
volume = "14",
number = "15",
pages = "2970",
doi = "10.3390/polym14152970"
}

Pantić, O., Spasojević, M., Džunuzović, E., Nikolić, M. S., Savić, S., Marković, M.,& Spasojević, P. M.. (2022). The Effect of Glycol Derivatives on the Properties of Bio-Based Unsaturated Polyesters. in Polymers
MDPI., 14(15), 2970.
https://doi.org/10.3390/polym14152970

Pantić O, Spasojević M, Džunuzović E, Nikolić MS, Savić S, Marković M, Spasojević PM. The Effect of Glycol Derivatives on the Properties of Bio-Based Unsaturated Polyesters. in Polymers. 2022;14(15):2970.
doi:10.3390/polym14152970 .

Pantić, Olga, Spasojević, Milica, Džunuzović, Enis, Nikolić, Marija S., Savić, Sanja, Marković, Maja, Spasojević, Pavle M., "The Effect of Glycol Derivatives on the Properties of Bio-Based Unsaturated Polyesters" in Polymers, 14, no. 15 (2022):2970,
https://doi.org/10.3390/polym14152970 . .

TY  - JOUR
AU  - Spasojević, Pavle M.
AU  - Šešlija, Sanja
AU  - Marković, Maja
AU  - Pantić, Olga
AU  - Antić, Katarina
AU  - Spasojević, Milica
PY  - 2021
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/4797
AB  - Nowadays, unsaturated polyester resins (UPR) are mainly obtained from non-renewable resources. The ever-increasing regulations and the continuous demand for more sustainability have led to extensive research towards more environmentally suitable alternatives to petroleum-based materials. However, one of the main disadvantages of bio-based UPR is their relatively high viscosity compared to petrochemical ones. In order to overcome this drawback, in this work, we investigated the possibility to lower the resin viscosity utilizing a mixture of dimethyl itaconate (DMI) and methyl methacrylate (MMA) as a reactive diluent. The effect of the DMI and MMA ratio on resin rheological properties was investigated. The optimal curing parameters were determined and all UPRs had a high gel content, which was shown to be dependent on the DMI and MMA ratio in the formulation. Furthermore, thermomechanical and mechanical properties of the resulting network were also found to be affected by the used reactive diluent mixture. A small substitution of DMI by MMA proved to be advantageous since it offers lower resin viscosity and improved mechanical properties.
PB  - MDPI
T2  - Polymers
T1  - Optimization of reactive diluent for bio-based unsaturated polyester resin: A rheological and thermomechanical study
VL  - 13
IS  - 16
SP  - 2667
DO  - 10.3390/polym13162667
ER  - 

@article{
author = "Spasojević, Pavle M. and Šešlija, Sanja and Marković, Maja and Pantić, Olga and Antić, Katarina and Spasojević, Milica",
year = "2021",
abstract = "Nowadays, unsaturated polyester resins (UPR) are mainly obtained from non-renewable resources. The ever-increasing regulations and the continuous demand for more sustainability have led to extensive research towards more environmentally suitable alternatives to petroleum-based materials. However, one of the main disadvantages of bio-based UPR is their relatively high viscosity compared to petrochemical ones. In order to overcome this drawback, in this work, we investigated the possibility to lower the resin viscosity utilizing a mixture of dimethyl itaconate (DMI) and methyl methacrylate (MMA) as a reactive diluent. The effect of the DMI and MMA ratio on resin rheological properties was investigated. The optimal curing parameters were determined and all UPRs had a high gel content, which was shown to be dependent on the DMI and MMA ratio in the formulation. Furthermore, thermomechanical and mechanical properties of the resulting network were also found to be affected by the used reactive diluent mixture. A small substitution of DMI by MMA proved to be advantageous since it offers lower resin viscosity and improved mechanical properties.",
publisher = "MDPI",
journal = "Polymers",
title = "Optimization of reactive diluent for bio-based unsaturated polyester resin: A rheological and thermomechanical study",
volume = "13",
number = "16",
pages = "2667",
doi = "10.3390/polym13162667"
}

Spasojević, P. M., Šešlija, S., Marković, M., Pantić, O., Antić, K.,& Spasojević, M.. (2021). Optimization of reactive diluent for bio-based unsaturated polyester resin: A rheological and thermomechanical study. in Polymers
MDPI., 13(16), 2667.
https://doi.org/10.3390/polym13162667

Spasojević PM, Šešlija S, Marković M, Pantić O, Antić K, Spasojević M. Optimization of reactive diluent for bio-based unsaturated polyester resin: A rheological and thermomechanical study. in Polymers. 2021;13(16):2667.
doi:10.3390/polym13162667 .

Spasojević, Pavle M., Šešlija, Sanja, Marković, Maja, Pantić, Olga, Antić, Katarina, Spasojević, Milica, "Optimization of reactive diluent for bio-based unsaturated polyester resin: A rheological and thermomechanical study" in Polymers, 13, no. 16 (2021):2667,
https://doi.org/10.3390/polym13162667 . .