Tailored modular assembly derived self-healing polythioureas with largely tunable properties covering plastics, elastomers and fibers.

ABSTRACT: To impart self-healing polymers largely adjustable dynamicity and mechanical performance, here we develop libraries of catalyst-free reversible polythioureas directly from commodity 1,4-phenylene diisothiocyanate and amines via facile click chemistry based modular assembly. By using the amine modules with various steric hindrances and flexibilities, the reversible thiourea units acquire triggering temperatures from room temperature to 120 °C. Accordingly, the derived self-healable, recyclable and controlled degradable dynamically crosslinked polythioureas can take effect within wide temperature range. Moreover, mechanical properties of the materials can be tuned covering plastics, elastomers and fibers using (i) different assemble modules or (ii) solid-state stretching. Particularly, unidi

SUBMITTER: Li YM 

PROVIDER: S-EPMC9098433 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature