Azo-Containing Polymers with Degradation On-Demand Feature

摘要: Molecules comprising aliphatic azo moieties are widely used as radical polymerization initiators, but only a few studies have explored their usefulness stimuli-responsive motifs in macromolecular constructs. The controlled degradation of azo-containing polymers has indeed remained largely unexplored. Here we present the syntheses linear polyamides and polyurethanes report on thermally optically induced responses solution solid state. We show that stimuli-induced behavior depends strongly nature polymer backbone, state matter, solution, solvent. solid-state properties materials may be particularly useful. In case studied here, temperature- or light-induced cleavage led to controllable decrease molecular weight, which, turn, caused reduction elongation at break, modulus, strength. co...