Dynamic elastomers based on bio‐derived crosslinker

Petroleum-derived monomers are the most common building blocks for ester-based thermosets. Bio-derived thermoset elastomers becoming viable alternatives to conventional Herein, we developed a biobased vitrimer-type using abundant and sustainable raspberry ketone as feedstock. We utilize create dynamic oxime chemistry crosslinked these through free radical polymerization with poly(ethylene glycol) methyl ether methacrylate comonomer. In contrast other networks based on ester bonds, which need catalysts, this is undesirable since catalyst deactivation or leaching lowers its effect over time may impair reuse. This network incorporates catalyst-free bond exchange reactions in catalyst-dependent polyester by substituting oxime-esters typical linkages. The elastomer exhibits stress relaxation, low glass transition temperature (Tg) (−55 −40.2°C) tensile strength up 5.2 ± 3.0 kPa. Furthermore, transesterification mechanism allows be reprocessed hot press at 160°C 8 × 103 kPa pressure. After reprocessing, of can recovered 78.1 10.9%. work integrates principles process mechanical recycling coupled components provide rational solution towards elastomers. future, exploited development hydrogels, recyclable elastomers, commodity plastics.