Thermally responsive AIE-active polyurethanes based on a tetraaniline derivative.

ABSTRACT: Polyurethanes with different soft-hard segment ratios were successfully synthesized, with an aggregation-induced-emission (AIE)-active tetraaniline derivative (NH₂-B₃-Ani₄-NH₂) as the hard segment. The resulting polyurethanes exhibited typical AIE features. The fluorescence intensities of polyurethane films changed with heat treatments. The fluorescence intensities of the polyurethane films decreased sharply after quenching treatment, yet their fluorescence intensities exceeded the original intensities of the films after thermal annealing at 80 °C for 24 h. Differential Scanning Calorimetry (DSC) results implied that the melting peaks in polyurethane films disappeared after quenching treatment, but the melting peaks appeared again after thermal a

SUBMITTER: Liu B 

PROVIDER: S-EPMC9057807 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature