Pantic Olga, Spasojevic Milica, Dzunuzovic Enis, Nikolic Marija S, Savic Sanja, Markovic Maja, Spasojevic Pavle
Institute of Chemistry, Technology and Metallurgy, Center of Excellence in Environmental Chemistry and Engineering, University of Belgrade, Njegoševa 12, 11000 Belgrade, Serbia.
Innovative Centre of Faculty of Chemistry, University of Belgrade, Studentski Trg 12-16, 11000 Belgrade, Serbia.
Polymers (Basel). 2022 Jul 22;14(15):2970. doi: 10.3390/polym14152970.
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.
本研究的范围是制备具有与商业配方相当性能的全生物基不饱和聚酯树脂（UPR）。重点是使用同一组二元酸（衣康酸和琥珀酸）和不同的二元醇（丙二醇、异山梨醇和新戊二醇）或其等摩尔混合物来确定最佳预聚物配方，在所有进料组合物中保持1:1:2.1的固定摩尔比。代替常用的苯乙烯，使用生物基衣康酸二甲酯作为反应性稀释剂（RD）。详细研究了所得树脂的流变学。解释了所用二元醇对结构（FTIR）、热性能（DSC）、热机械性能（DMA）和机械性能（拉伸）的影响。发现UPR的性能高度依赖于预聚物配方中使用的二元醇。丙二醇和新戊二醇等摩尔比的UPR被证明是与商业石油基树脂竞争的最有前途的候选物。
