Exploiting valuable supramolecular materials from waste plastics

Abstract

A new family of supramolecular materials is exploited from waste thermosets via one-step retrosynthetic approach, which exhibits distinguished adhesion properties in dry/wet environments, good corrosion resistance and dynamic reversibility. This...

Rapid degradation of thermosetting ester epoxies and monomer recovery methods

“…1(b) and Table 2, the molecular weight of DEP was 1014, the molecular weight distribution was 1.08, the cured polymeric material transformed into an oligomer, and the nal product consisted of a mixture of various oligomers. to directly mixing the alcohol and alkali in equal proportions using the joint depolymerization method [41]; this avoids sodium cyclohexene-2-carboxylate deposition on the surface of the epoxy-cured material, lowering the reaction rate and reducing side reactions. The IR and 1 H-NMR spectra of the sodium salt isolated from DEP resembled those of the standard material, con rming the generation of the sodium salt during alkaline depolymerization; however, the separated sodium salt still retained the structure of the amine curing agent.…”

High performance, self-adhesive and recyclable dynamic crosslinked waste rubber particle blends toward upcycling of waste rubber

“…5c). [37][38][39][40][41][42][43][44][45][46][47][48][49] Generally, there are three modes for adhesion failure: interface failure, cohesive failure and mixed failure. Mixed failure mode usually represents good adhesion behavior.…”

Upcycling of thermosetting polymers into high-value materials

“…72 DEPs have also been used in different fields according to different degradation methods. Recently, Xu, Wang and coworkers 73 used only hydrogen peroxide to realize the degradation of epoxy resin. In the degradation process, the OH radicals attacked the C-N bond and destroyed the threedimensional network in epoxy resin, finally obtaining oligomers with carboxyl, amino and hydroxyl groups.…”