Abstract
Regulation of phase structure has been recognized as one of the most effective ways to fabricate self-healing polymers with high me-chanical 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 sepa-rated phase size.Here,we report the first study on tuning the phase size through reversible addition-fragmentation chain transfer(RAFT)poly-merization 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.
基金项目
山东省自然科学基金(ZR2022MB122)
"Qingchuang science and technology plan"project of colleges and Universities in Shandong Province(2020KJC005)
维普
万方数据