Architecting Branch Structure in Terpolymer of CO_(2),Propylene Oxide and Phthalic Anhydride:An Enhancement in Thermal and Mechanical Performances

作     者：Wen-Jing Wang Shu-Xian Ye Jia-Xin Liang Cong-Xiao Fan Yong-Lan Zhu Shuan-Jin Wang Min Xiao Yue-Zhong Meng Wen-Jing Wang;Shu-Xian Ye;Jia-Xin Liang;Cong-Xiao Fan;Yong-Lan Zhu;Shuan-Jin Wang;Min Xiao;Yue-Zhong Meng

作者机构：The key laboratory of Low-carbon Chemistry&Energy Conservation of Guangdong ProvinceState Key Laboratory of Optoelectronic Materials and TechnologiesSchool of Materials Science and EngineeringSun Yat-sen UniversityGuangzhou 510275China 

出 版 物：《Chinese Journal of Polymer Science》 (高分子科学（英文版）)

年 卷 期：2022年第40卷第5期

页      面：462-468页

核心收录：

学科分类：0817[工学-化学工程与技术] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：financially supported by the National Natural Science Foundation of China(No.51673131) the Fundamental Research Funds for the Central Universities(No.171gjc37) 

主　　题：CO_(2)utilization Pyromellitic anhydride Biodegradability Branched structure Melt flow index 

摘      要：Poly(propylene carbonate phthalate)(PPC-P)is a chemically modified poly(propylene carbonate)(PPC)biodegradable thermoplastic by introducing phthalic anhydride(PA)as the third monomer into the copolymerization of propylene oxide(PO)and CO_(2).To enhance the thermal and mechanical properties of PPC-P,a branching agent pyromellitic anhydride(PMDA)was introduced into the terpolymerization of PO,PA and CO_(2).The resulting copolymers with branched structure,named branched PPC-P,can be obtained using metal-free Lewis pair consisting of triethyl borane(TEB)and bis(triphenylphosphine)iminium chloride(PPNCl)as *** products obtained were analyzed by NMR spectroscopy and their thermal,mechanical properties and melt processability were evaluated by DSC,TGA,tensile test and melt flow index(MFI)*** obtained branched PPC-P has a high molecular weight up to 156.0 kg·mol^(-1).It shows an increased glass transition temperature(Tg)higher than 50℃and an enhanced tensile strength as high as 38.9 ***,the MFI value decreases obviously,indicative of an improved melt strength arising from the branched structure and high molecular *** is more,the branched PPC-P exhibits reasonable biodegradability,which demonstrates the great potential as a new green thermoplastic for the family of biodegradable plastics.