典型文献
Controlled synthesis and closed-loop chemical recycling of biodegradable copolymers with composition-dependent properties
文献摘要：
The closed-loop recycling concept of the polymer wastes into building-block chemicals is attractive,but the closed-loop recycling of copolymers enabled by energy-efficient chemical recycling and cost-effective separations is still facing great challenges.Herein,for the first time,a one-pot sequential copolymerization of γ-butyrolactone(γ-BL)and p-dioxanone(PDO)using an economical ureas/alkoxides catalytic system is conducted to synthesize biodegradable and chemically recyclable poly-(γ-butyrolactone)-block-poly(p-dioxanone)(PγBL-b-PPDO)diblock copolymers with well-defined and controlled structures.The composition-dependent properties of PγBL-b-PPDO copolymers,including thermal properties and crystallization behavior,are investigated.The results show that the thermal stability and crystalline ability of PγBL are enhanced observably by introducing the PPDO block.Significantly,the PγBL-b-PPDO copolymers can be de polymerized efficiently into the corre-sponding co-monomers with a yield of over 95％by simply low-temperature pyrolysis under vacuum.Moreover,γ-BL and PDO monomers are selectively separated with an isolated purity of about 99％based on the difference in their physicochemical properties.Subsequently,their repolymerization is realized to obtain the copolymers with nearly identical structures and thermostability,demonstrating the closed-loop recycling of copolymers,i.e.,polymerization-depolymerization-repolymeriza-tion.This research provides important guidance for the design of novel sustainable polymers towards more efficient chemical recycling,separation and regeneration.
文献关键词：
中图分类号：
作者姓名：
Yi-Teng Yan;Gang Wu;Si-Chong Chen;Yu-Zhong Wang
作者机构：
The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials(MoE),National Engineering Laboratory of Eco-Friendly Polymeric Materials(Sichuan),State Key Laboratory of Polymer Materials Engineering,College of Chemistry,Sichuan University,Chengdu 610064,China
文献出处：
引用格式：
[1]Yi-Teng Yan;Gang Wu;Si-Chong Chen;Yu-Zhong Wang-.Controlled synthesis and closed-loop chemical recycling of biodegradable copolymers with composition-dependent properties)[J].中国科学:化学（英文版）,2022(05):943-953
A类：
dioxanone,ureas,alkoxides,observably,repolymerization,repolymeriza
B类：
Controlled,synthesis,closed,loop,recycling,biodegradable,copolymers,composition,dependent,properties,concept,wastes,into,building,chemicals,attractive,enabled,by,energy,cost,effective,separations,still,facing,great,challenges,Herein,first,pot,sequential,copolymerization,butyrolactone,BL,using,economical,catalytic,system,conducted,synthesize,chemically,recyclable,PPDO,diblock,well,defined,controlled,structures,including,thermal,crystallization,behavior,are,investigated,results,show,that,crystalline,enhanced,introducing,Significantly,polymerized,efficiently,corre,sponding,monomers,yield,simply,low,temperature,pyrolysis,under,vacuum,Moreover,selectively,separated,isolated,purity,about,difference,their,physicochemical,Subsequently,realized,obtain,nearly,identical,thermostability,demonstrating,depolymerization,This,research,provides,important,guidance,design,novel,sustainable,towards,more,regeneration
AB值：
0.490688
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