Detecting topology freezing transition temperature of vitrimers by AIE luminogens.

ABSTRACT: Vitrimers are one kind of covalently crosslinked polymers that can be reprocessed. Topology freezing transition temperature (T_v) is vitrimer's upper limit temperature for service and lower temperature for recycle. However, there has been no proper method to detect the intrinsic T_v till now. Even worse, current testing methods may lead to a misunderstanding of vitrimers. Here we provide a sensitive and universal method by doping or swelling aggregation-induced-emission (AIE) luminogens into vitrimers. The fluorescence of AIE-luminogens changes dramatically below and over T_v, providing an accurate method to measure T_v without the interference of external force. Moreover, according to this method, T_v is independent of catalyst loading. Th

SUBMITTER: Yang Y 

PROVIDER: S-EPMC6639363 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature