Photodegradable polar-functionalized polyethylenes  

作　　者：Chaoqun Wang Jian Xia Yuxing Zhang Xiaoqiang Hu Zhongbao Jian 

机构地区：[1]State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China [2]School of Applied Chemistry and Engineering,University of Science and Technology of China,Hefei230026,China

出　　处：《National Science Review》2023年第7期119-128,共10页国家科学评论（英文版）

基　　金：supported by the National Natural Science Foundation of China(22122110 and 21871250);the Jilin Provincial Science and Technology Department Program(20230101347JC)。

摘　　要：The degradation of plastics has attracted much attention from the global community.Polyethylenes(PEs),as the most abundant synthetic plastics,are most frequently studied.PE is non-degradable and non-polar because of the sole presence of the pure hydrocarbon components.Concurrent incorporation of both in-chain cleavable and functional groups into the PE chain is an effective pathway to overcome the non-degradable and non-polar issue;however,the method for achieving this pathway remains elusive.Here,we report a strictly non-alternating(>99%)terpolymerization of ethylene with CO and fundamental polar monomers via a coordination-insertion mechanism using late transition metal catalysts,which effectively prevents the formation of undesired chelates originating from both co-monomers under a low CO concentration.High-molecular-weight linear PEs with both in-chain isolated keto(>99%)and main-chain functional groups are prepared.The incorporation of key low-content isolated keto groups makes PEs photodegradable while retaining their desirable bulk material properties,and the introduction of polar functional groups considerably improves their surface properties.

关 键 词：degradable plastic homogeneous catalysis C1 chemistry non-alternating copolymerization POLYOLEFIN 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]