A Supramolecular Polymer Based on Tweezer-Type π−π Stacking Interactions: Molecular Design for Healability and Enhanced Toughness

Abstract

A supramolecular elastomer comprising a blend of a pyrenyl-tweezer-ended polyamide intercalating with a chain-folding polyimide shows near-quantitative thermal healability. It also exhibits greatly enhanced toughness relative to an analogous system in which the polyamide end-groups are simple pyrenyl residues, reflecting the increased association constant between the two complementary binding motifs.