Effective End-Group Modification of Star-Shaped PNVCL from Xanthate to Trithiocarbonate Avoiding Chemical Crosslinking.

ABSTRACT: In this study, six-arm star-shaped poly(N-vinylcaprolactam) (PNVCL) polymers prepared by reversible addition-fragmentation chain transfer (RAFT) polymerization were subjected to aminolysis reaction using hexylamine. Chemically crosslinked gels or highly end-functionalized star polymers can be obtained depending mainly on the type of solvent used during the transformation of the RAFT functional group. An increase in the viscosity of the solution was observed when the aminolysis was carried out in THF. In contrast, when the reaction was conducted in dichloromethane, chain-end thiol (PNVCL)₆ star polymers could be obtained. Moreover, when purified (PNVCL-SH)₆ star polymers are in contact with THF, the gelation occurs in just a few minutes, with an obvious increase

SUBMITTER: Cortez-Lemus NA 

PROVIDER: S-EPMC8588085 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature