Chemical upcycling of poly(lactide) plastic waste to lactate ester,lactide and new poly(lactide) under Mg-catalysis condition  

作　　者：Xianyue Zhou Qiuyang Liu Guangqiang Xu Rulin Yang Hongguang Sun Qinggang Wang 

机构地区：[1]College of Polymer Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China [2]Key Laboratory of Biobased Materials,Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences,Qingdao 266101,China [3]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Chemical Letters》2023年第10期275-280,共6页中国化学快报（英文版）

基　　金：support by the National Natural Science Foundation of China (No. 21901249);Taishan Scholars Program of Shandong Province (No. tsqn201812112);the Scientific Research and Innovation Fund Project of Shandong Energy Research Institute (No. SEI I202004)。

摘　　要：Chemical upcycling of end-of-life poly(lactide) plastics to lactide,lactate ester and new poly(lactide)has been achieved by using magnesium bis[bis(trimethylsilyl)amide][Mg(HMDS)_(2)]as promoter.Mg(HMDS)2 showed high efficiency in L-lactide polymerization and poly(lactide) depolymerization.Mg(HMDS)_(2)/Ph_(2) CHOH catalytic system displayed high ring-opening selectivity and the characteristic of immortal polymerization.Taking advantage of transesterification,depolymerizations of end-oflife poly(lactide) plastics to lactate ester (polymer to value-added chemicals) and lactide (polymer to monomer) were achieved with high yields.Besides,a new“depolymerization-repolymerization”strategy was proposed to directly transform poly(lactide) into new poly(lactide).This work provides a theoretical basis for the design of polymerization and depolymerization catalysts and promotes the development of degradable polymers.

关 键 词：Upcycling Poly(lactide) Mg(HMDS)2 Polymerization DEPOLYMERIZATION 

分 类 号：X705[环境科学与工程—环境工程] TQ072[化学工程] TQ426