Self-healing thermoplastic elastomers

PEOPLE: Laurent Bouteiller, Sandrine Pensec

Low-energy interactions are intrinsically dynamic and can therefore be used to re-form broken bonds. This idea has been widely exploited in the literature, but we propose an original approach that consists in transforming an industrial thermoplastic elastomer into a self-healing elastomer, simply by introducing an additive that modulates the dynamic character of the physical cross-linking nodes.

The macromolecular nature of this additive accelerates the material’s dynamics while limiting its softening. We have validated the concept in the case of silicone-urea elastomers (collab. F. Ganachaud (IMP), L. Chazeau (MATEIS)),1 then extended it to the industrially more promising case of thermoplastic polyurethanes.

Macromolecular Additives to Turn a Thermoplastic Elastomer into a Self-Healing Material

Simonin, L.; Falco, G.; Pensec, S.; Dalmas, F.; Chenal, J.-M.; Ganachaud, F.; Marcellan, A.; Chazeau, L.; Bouteiller, L.
Macromolecules 2021, 54, 888–895