Tailoring the Properties of Polyhydroxyalkanoates from Plastics to Elastomers via Stereoselective Copolymerizations of rac-β-Butyrolactone and β-Propiolactone  

作　　者：Haoran Zhang JiaojiaoQin Xiaoyan Tang 

机构地区：[1]Beijing National Laboratoryfor Molecular Sciences,Key Laboratory of Polymer Chemistry and Physics of Ministry of Education,Centerfor Soft Matter Science and Engineering,Collegeof Chemistry and Molecular Engineering,Peking University,Beijing 100871,China

出　　处：《Chinese Journal of Chemistry》2024年第9期963-972,共10页中国化学（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.52173093);Peking University Ge Li and Ning Zhao Life Science Research Fund for Young Scientists。

摘　　要：Poly(3-hydroxybutyrate),a crucial member of the large biodegradable polyhydroxyalkanoate family,suffers from its brittleness.To enhance its performance,we employed a straightforward approach involving the ring-opening copolymerization of racemic-β-butyrolactone(rac-β-BL)andβ-propiolactone(β-PL)using the syndio-selective amino-alkoxy-bis(phenolate)-yttrium complex as a catalyst,thanks to the excellent ductility of poly(3-hydroxypropionate).Control over the rac-β-BL/β-PL feeding ratios and polymerization time yielded random or block copolymers with tunable thermal and mechanical properties comparable to traditional fossil-based plastics.Furthermore,we achieved one-pot synthesis of hard-soft-hard triblock copolymers by exploiting monomers’different copolymerization rates and a bifunctional initiator,thus transforming polyhydroxyalkanoates from hard and tough plastics to soft and ductile thermoplastic elastomers.

关 键 词：Ring-opening(co-)polymerization Biodegradable polymers POLYHYDROXYALKANOATES Copolymers PLASTICS Elastomers 

分 类 号：O63[理学—高分子化学]