Mechanochromism and strain-induced crystallization in thiol-yne-derived stereoelastomers

Abstract

In various embodiments. the present invention relates to a recyclable, semi-crystalline, mechanochromic elastomeric composition for use in sensor, strain-sensing and shape-memory applications having mechanochromism, SH, and SIC properties that are each strain rate-dependent. In various embodiments, the present invention is directed to a dipropiolate-derivatized spiropyran (SP) mechanophore and thiol-yne-derived stereoelastomers doped with these SP mechanophores. These SP doped, thiol-yne-derived stereoelastomers may be synthesized via a base-directed Michael addition polymerization reaction. These linear polymers have been found to be semi-crystalline, recyclable, and mechanochromic under several methods of mechanical activation.

Dependencies are inferred from the claim text.