Thermal degradation kinetics and thermodynamics of maleimide-sytrene based alternating copolymer: A comparative investigation of monomer and polymer structures
作者:Gülbanu Koyundereli Çılgı、Metin Ak
DOI:10.1016/j.molstruc.2020.128879
日期:2020.12
N-(4-(3-Thienyl methylene)-oxycarbonylphenyl) maleimide monomer, MT and its copolymer with styrene, P(MT-alt-St) were investigated comparatively using TG and DTA methods. Degradation of monomer takes place in three stages which correspond to removal of thiophene, aliphatic groups and the rest of structural decomposition respectively. Degradation of the copolymer occurs in two stages. Thiophene and aliphatic
摘要 采用TG和DTA方法对N-(4-(3-噻吩基亚甲基)-氧羰基苯基)马来酰亚胺单体MT及其与苯乙烯的共聚物P(MT-alt-St)的热降解进行了对比研究。单体的降解分三个阶段进行,分别对应于噻吩、脂肪族基团和其余结构分解的去除。共聚物的降解发生在两个阶段。噻吩和脂肪族基团在第一降解阶段同时分解。主聚合物链保持完整。第二阶段与结构分解的其余部分有关。通过使用 Flynn-Wall-Ozawa (FWO) 和 Kissinger-Akahira-Sunose (KAS) 方法计算这些反应的活化能值。为了确定有效的反应模型和计算热力学参数,这些方法与建模方程相结合。发现单体和共聚物的第一降解阶段与扩散模型(D1)表现出良好的协调性,而成核和生长模型(A2)对于单体的第二分解阶段是有效的。