A novel thermoplastic shape memory polymer with solid-state plasticity derived from exchangeable hydrogen bonds.

ABSTRACT: A novel thermoplastic shape memory polymer (SMP) was synthesized by partly modifying the double bonds of trans-1,4-polybutadiene (TPB) and subsequently introducing mono-isocyanate as pendant groups. The comb-like chains consisted of abundant hydrogen bonds on their side groups, which could readily assemble into dynamic non-covalent polymer networks. The physical crosslink net-points formed by the hydrogen bonds were utilized to anchor the permanent shape of PBTP, while the soft trans-1,4-polybutadiene segments served as a switching phase to afford the temporary shape, and the glass transition temperature (T _g) was taken as the switching temperature. The optimal result was obtained with the sample with 30% modification, which showed an excellent shape fixity

SUBMITTER: Zhang X 

PROVIDER: S-EPMC9050058 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature