A robust and stretchable cross-linked rubber network with recyclable and self-healable capabilities based on dynamic covalent bonds

Abstract

Rubber composites composed of biobased epoxidized natural rubber and tunicate cellulose nanocrystals exhibited recyclable and self-healable capacities via transesterification reactions.

A catalyst-free and recycle-reinforcing elastomer vitrimer with exchangeable links

“…It was reported that dynamic ester linkages with reversible exchange reactions are capable of rearranging the topology network structure under appropriate conditions. 36,37 Thus, we envisaged the cured XNBR/ENR elastomers, comprising bhydroxyl ester linkages, are able to rearrange the topological structure via the transesterication reaction (Fig. 1b).…”

Monitoring the structure–reactivity relationship in epoxidized perilla and safflower oil thermosetting resins

“…In many reported studies, materials reprocessing usually takes place with the help of an external stimulus such as UV irradiation 34,35 or heating at high temperature, 36 or in the pres-ence of a catalyst. 27,37 Distinguished from other materials, sulfur-containing moieties (S-S) offer unique opportunities in which exchange can be activated at moderate temperature without any catalyst or initiator. 32,[38][39][40] Inspired by the strategy of importing exchange bonds from the hardener structure, we used disulfide-containing acids as crosslinkers to design biobased thermosets with dual dynamic exchange: through (i) carboxylate transesterification, and (ii) disulfide metathesis.…”

Epoxy-Anhydride Vitrimers from Aminoglycidyl Resins with High Glass Transition Temperature and Efficient Stress Relaxation

“…Previous studies revealed that catalyst type and concentration influence the T v , and several types have been introduced [4]. The most popular types are organic zinc salts, such as zinc acetylacetonate and zinc acetate [1,11,12]. The organic guanidine base 1,5,7-triazabicyclo[4.4.0]dec-5-ene is another effective transesterification catalyst, which has been often used in the design of epoxy-based vitrimeric systems [13,14].…”