Ring-opening metathesis polymerization of cyclopropene derivatives towards polyolefin elastomer analogues  

作　　者：Jing Bai Yu Wang Wei You 

机构地区：[1]Beijing National Laboratory for Molecular Sciences(BNLMS),CAS Key Laboratory of Engineering Plastics,Institute of Chemistry,Chinese Academy of Sciences,Beijing100190,China [2]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Science China Chemistry》2022年第11期2182-2187,共6页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China(22001254);。

摘　　要：Polyolefin elastomers(POEs) are important reprocessable industrial materials with high strain-recovery performance. Traditional POEs are prepared from transition-metal-catalyzed polymerization of ethylene and α-olefins, while because of the complicated coordination polymerization mechanism, defining the actual distribution and length of alkyl branches in POEs is extremely challenging. We herein propose an alternative approach of synthesizing POE analogues from ring-opening metathesis polymerization(ROMP) of highly strained 3,3-alkyl-substituted cyclopropenes(CPEs). The structures of monomers and the substituents of Ru-catalysts are investigated in detail to evaluate the homobenzyl-substituted CPE derivative as a new living ROMP monomer. After copolymerization with cyclooctene and backbone hydrogenation, POE analogues with well-defined alkyl branches are prepared. Since the ROMP reactions have little isomerization and can also give good control of molecular weight and copolymer composition, it is hypothesized that this synthetic approach provides a novel platform to assist understanding the influence of branches on the properties of POEs.

关 键 词：CYCLOPROPENES ring-opening metathesis polymerization polyolefin elastomers alkyl substituents 

分 类 号：TQ334[化学工程—橡胶工业] O643.36[理学—物理化学]