文献类型：期刊文献

英文题名：Kinetic analysis of PA4 thermal degradation: Thermal stability with respect to crystallinity

作者：Wang, Mingda[1,2,3];Zhang, Yajing[1,2,3];Zhan, Fangke[1,2,3];Qiu, Yongjun[1,2,3];Chen, Tao[2,3,4];Zhao, Liming[1,2,3]

机构：[1]East China Univ Sci & Technol, Sch Biotechnol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China;[2]China Natl Light Ind Council, Key Lab Biobased Mat Engn, Shanghai 200237, Peoples R China;[3]Shanghai Collaborat Innovat Ctr Biomfg Technol SCI, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China

年份：2024

卷号：227

外文期刊名：POLYMER DEGRADATION AND STABILITY

收录：;EI(收录号：20242516263910);WOS:【SCI-EXPANDED(收录号:WOS:001258755300001)】；

基金：This work was supported by the Research and Development of Technical Standards for Bio-based Material Polybutyrolactam Project (21DZ2205900), the National Key Research and Development Program of China (2022YFC2104500), the 111 Project (B18022), and Shanghai Sailing Program (20YF1409900).

语种：英文

外文关键词：Polyamide 4; Thermal degradation; Crystallinity

摘要：Polyamide 4 (PA4) has garnered considerable attention due to its fully bio-based origin and biodegradability as a high -performance polyamide. Nevertheless, thermal degradation during the melting process impedes thermal processing, thereby constraining its potential for engineering plastics applications. To clarify the thermal degradation reactions of PA4 amidst intricate physical and chemical transformations, establishing a theoretical foundation for the thermal stability modification, we conducted a comprehensive analysis of PA4 thermal degradation coupled with crystallization, considering kinetics and reaction mechanisms. Calculation of reaction activation energies and mechanism functions revealed that PA4 pyrolysis is a two-stage compound process, with distinct degradation mechanisms attributed to the crystalline and amorphous regions. Additionally, the thermal degradation mechanism of the PA4-CaCl 2 composite system at varying crystallinity levels was illustrated. The incorporation of Ca strengthens intermolecular forces in the samples, leading to an increased overall stability. Simultaneously, a notable alteration in the reaction mechanism was observed in the crystalline zone lacking the Ca phase.