Upcycling of Poly(butylene adipate-co-terephthalate)into Dual Covalent Adaptable Networks through Chain Breaking-Crosslinking Strategy  

作　　者：Bin-Bo Wang Rong Huang Xin Wang Tao Jiang Yi Wang Shuai Du Fa-Lin Li Jin Zhu Song-Qi Ma 

机构地区：[1]Key Laboratory of Synthetic and Biological Colloids,Ministry of Education,School of Chemical and Material Engineering,Jiangnan University,Wuxi,214122,China [2]Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province,Divisions of Polymers and Composites,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo,315201,China [3]University of Chinese Academy of Sciences,Beijing,100049,China

出　　处：《Chinese Journal of Polymer Science》2024年第10期1505-1513,I0011,共10页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.52373007 and 52073296);Innovative Leading Talent of Taihu Lake Talent Plan in Wuxi City;Zhejiang Ten Thousand Talent Program;Research startup fund from Jiangnan University。

摘　　要：Poly(butylene adipate-co-terephthalate)(PBAT),a widely studied biodegradable material,has not effectively addressed the problem of plastic waste.Taking into consideration the cost-effectiveness,upcycling PBAT should take precedence over direct composting degradation.The present work adopts a chain breaking-crosslinking strategy,upcycling PBAT into dual covalent adaptable networks(CANs).During the chainbreaking stage,the ammonolysis between PBAT and polyethyleneimine(PEI)established the primary crosslinked network.Subsequently,styrene maleic anhydride copolymer(SMA)reacted with the hydroxyl group,culminating in the formation of dual covalent adaptable networks.In contrast to PBAT,the PBAT-dual-CANs exhibited a notable Young's modulus of 239 MPa,alongside an inherent resistance to creep and solvents.Owing to catalysis from neighboring carboxyl group and excess hydroxyl groups,the PBAT-dual-CANs exhibited fast stress relaxation.Additionally,they could be recycled through extrusion and hot-press reprocessing,while retaining their biodegradability.This straightforward strategy offers a solution for dealing with plastic waste.

关 键 词：Poly(butylene adipate-co-terephthalate) Dynamic crosslinked networks Chain breaking-crosslinking strategy Upcycle Recycle 

分 类 号：TQ323.41[化学工程—合成树脂塑料工业]