Modifying Poly(propylene carbonate) with Furan-based Non-Isocyanate Polyurethanes  

作　　者：Xiao-Jing Li Ying-Feng Wen Yong Wang Xing-Ping Zhou Xiao-Lin Xie 

机构地区：[1]Key Laboratory for Material Chemistry of Energy Conversion and Storage,Ministry of Education,School of Chemistry and Chemical Engineering,Huazhong University of Science and Technology,Wuhan,430074,China

出　　处：《Chinese Journal of Polymer Science》2023年第7期1069-1077,共9页高分子科学（英文版）

基　　金：financial support from the National Key Research and Development Program of China (No. 2016YFB0302400);the National Natural Science Foundation of China (No. 21604027)

摘　　要：Poly(propylene carbonate) (PPC) is gaining significant momentum as a biodegradable polymer using CO_(2) as an abundant, low-cost and renewable feedstock. Yet, PPC suffers from unsatisfactory thermal and mechanical properties, and its blends with other synthetic polymers as the second component typically exhibit poor compatibility. Herein, novel furan-based non-isocyanate polyurethanes (NIPUs) with high molecular weights and narrow distributions have been synthesized starting from 5-hydroxymethylfurfural (HMF) via a four-step procedure including reduction, glycidylation, carbonation of CO_(2) and step-growth polymerization with diamines. Owing to the structural similarity and intermolecular hydrogen bonding interactions, furan-based NIPUs display good compatibility with PPC. A sea-island morphology can be observed in SEM images of PPC/NIPU blends, where the NIPU phases are randomly dispersed in the PPC matrix. Moreover, the blends exhibit only one Tg (higher than both that of PPC and the corresponding NIPU) on the DSC curves, which first increase and then decrease when increasing the content of NIPUs from 0 wt% to 15 wt%. Notably, the physical crosslinking formed by hydrogen bonding interactions, coupled with the rigidity of furan rings, confer simultaneous improvements of elongation at the break and tensile strength, affording high-performance CO_(2)-based biodegradable polymeric materials with low carbon footprint, good sustainability, and ideal biocompatibility.

关 键 词：PPC CO_(2) NIPU HMF BLENDS 

分 类 号：TQ317[化学工程—高聚物工业]