Self-Healing Supramolecular Materials Constructed by Copolymerization via Molecular Recognition of Cavitand-based Coordination Capsules

Angewandte Chemie
Natsumi NittaTakeharu Haino

Abstract

The repeating guest units of poly-( R )- 2  were selectively encapsulated by the self-assembled capsule poly- 1 possessing the eight polymer side chains to form the supramolecular graft polymer (poly- 1 ) n •poly-( R )- 2 . The encapsulation of the guest units was confirmed by  1 H NMR spectroscopy and DOSY technique. The hydrodynamic radius of the graft polymer structure was greatly increased upon the complexation of poly- 1 . The supramolecular graft polymer (poly- 1 ) n •poly-( R )- 2  was stably formed in the 1:1 host-guest ratio, which increased the glass transition temperature more than 10 °C compared to that of poly- 1 . AFM visualized that (poly- 1 ) n •poly-( R )- 2  formed the networked structure on mica. The (poly- 1 ) n •poly-( R )- 2 gelled in 1,1,2,2-tetrachloroethane, which fabricated the distinct viscoelastic materials that demonstrated the self-healing behaviors in tensile test.

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