类玻璃高分子的再加工  

Reprocessing of Vitrimer

作　　者：何恩健 姚艳锦 张宇白 危岩[1] 吉岩[1] He Enjian;Yao Yanjin;Zhang Yubai;Wei Yen;Ji Yan(The Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology(Ministry of Education),Department of Chemistry,Tsinghua University,Beijing 100084;Research Institute of Petroleum Processing,SINOPEC,Beijing 100083)

机构地区：[1]清华大学化学系生命有机磷化学及化学生物学教育部重点实验室,北京100084 [2]中国石化石油化工科学研究院,北京100083

出　　处：《化学学报》2022年第7期1021-1041,共21页Acta Chimica Sinica

基　　金：国家自然科学基金(Nos.51722303,21674057)资助。

摘　　要：类玻璃高分子(vitrimer)是一类含有动态共价键的共价交联聚合物网络,结合了热固性聚合物和热塑性聚合物的优点.在外界刺激作用下,类玻璃高分子的动态共价键能够可逆断裂及形成,而交联密度不会发生变化,这种独特的性质使其能在保持三维交联网络结构的同时,实现再加工、回收再利用、焊接和愈合等功能.因此,类玻璃高分子有望解决传统热固性聚合物无法进行再加工和回收再利用等问题,推进资源的循环利用和社会可持续发展.重点介绍了类玻璃高分子不同的再加工方式,包括热加工、光热加工、电热加工和小分子辅助加工,并对各个加工方式的原理、特点和应用进行总结.最后,对类玻璃高分子再加工的发展进行了展望.Vitrimers are a kind of covalently cross-linked polymer networks containing dynamic covalent bonds,which combine the advantages of both thermosets and thermoplastics.Under external stimuli,the dynamic covalent bonds in the networks break and reform reversibly,while the cross-link density keeps unchanged.This unique property enables this kind of materials to maintain the three-dimensional cross-linked networks and exhibit various fascinating features such as reprocessing,recycling,welding,healing,etc.Thus,vitrimers are expected to solve the problems that traditional thermosets cannot be reprocessed and recycled,making it possible to promote resource recycling towards a green and sustainable society.This review mainly focuses on the reprocessing methods of vitrimers,including thermal processing,photothermal processing,electrothermal processing and small-molecule assisted processing.Then,the principles,characteristics and applications of each reprocessing method are summarized.Furthermore,the development prospects of vitrimer reprocessing are discussed.

关 键 词：类玻璃高分子 热固性聚合物 动态共价键 再加工 

分 类 号：O631.5[理学—高分子化学]