Effect of Phase Separation Size on the Properties of Self-healing Elastomer  

作　　者：Jun Xu Lei Zhu Xian-Qi Feng Cong Sui Wen-Peng Zhao Shou-Ke Yan 

机构地区：[1]School of Chemical Engineering,Qingdao University of Science&Technology,Qingdao,266042,China [2]College of Engineering,Yanching institute of Technology,Langfang,065210,China [3]Key Laboratory of Rubber-plastics,Qingdao University of Science&Technology,Qingdao,266042,China [4]State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing,100029,China

出　　处：《Chinese Journal of Polymer Science》2024年第6期798-804,共7页高分子科学（英文版）

基　　金：supported by the Natural Science Foundation of Shandong Province(No.ZR2022MB122);"Qingchuang science and technology plan"project of colleges and Universities in Shandong Province(No.2020KJC005).

摘　　要：Regulation of phase structure has been recognized as one of the most effective ways to fabricate self-healing polymers with high mechanical strength.The mechanical properties of the resultant polymers are certainly affected by the size of separated phase domain.However,the study on this aspect is absence,because it can hardly exclude the influence of variation in monomer proportion required for tuning the separated phase size.Here,we report the first study on tuning the phase size through reversible addition-fragmentation chain transfer(RAFT)polymerization without changing the proportion of monomers.As expected,the size of separated phase has been successfully mediated from 15 nm to 9 nm by tuning the molecular weight of the chain transfer agent.It is found that the mechanical strength and the self-healing efficiency of the resultant polymers increase simultaneously with the decrease of phase size.The study on the formation kinetics of hydrogen bonds reveals that the decrease of phase size can facilitate the re-bonding rate of hydrogen bonds,even if the migration of polymer chains is restricted.

关 键 词：Self-healing polymers Phase separation Reversible addition-fragmentation chain transfer 

分 类 号：TQ334[化学工程—橡胶工业]