Upcycling Polytetrahydrofuran to Polyester  

作　　者：Xun Zhang Yue Sun Chengjian Zhang Xinghong Zhang 

机构地区：[1]State Key Laboratory of Motor Vehicle Biofuel Technology,International Research Center for X Polymers,Department of Polymer Science and Engineering,Zhejiang University,Hangzhou 310027

出　　处：《CCS Chemistry》2023年第5期1233-1241,共9页中国化学会会刊（英文）

基　　金：support of the National Science Foundation of China(grant no.51973190);the Zhejiang Provincial Department of Science and Technology(grant no.2020R52006).

摘　　要：One major remaining challenge in polymer chemistry is the development of efficient chemical recycling strategies to fully retrieve starting materials.Polytetrahydrofuran(PTHF)is widely used,but its stable ether bonds make it difficult to chemically reuse after disposal.Here,we propose a“polymer A→polymer B”strategy for one-step quantitative upcycling of PTHF to polyesters.The route undergoes a cascade process:PTHF is depolymerized to give tetrahydrofuran(THF)that then alternately copolymerizes with cyclic anhydrides in situ,thereby pushing the chemical equilibrium of“PTHF⇌THF”to the right.The protocol demonstrates facile features:the use of common and metal-free Brønsted/Lewis acid as catalyst,a favorable reaction temperature of 100℃,and no use of solvents.This method also accommodates 18 cyclic anhydrides to give a library of polyesters with alternating sequences,tunable thermal properties,and high-fidelity carboxyl terminals.This is an unprecedented strategy for chemical recycling of waste polyether.

关 键 词：upcycling polymer chemically reuse POLYESTER POLYETHER POLYTETRAHYDROFURAN 

分 类 号：O63[理学—高分子化学]