Depolymerization of vulcanized poly(cyclopentene), poly(norbornene-<i>ran</i>-cyclopentene) and poly(<i>endo</i>-dicyclopentadiene-<i>ran</i>-cyclopentene) rubbers <i>via</i> ring-closing metathesis depolymerization for monomer recycling.

ABSTRACT: Herein, we report a study on the preparation, properties, and depolymerization of pristine and vulcanized poly(cyclopentene) (poly(CP)), poly(norbornene-ran-cyclopentene) (poly(NB-ran-CP)) and poly(endo-dicyclopentadiene-ran-cyclopentene) (poly (DCP-ran-CP)). First, poly(CP), poly(NB-ran-CP) and poly(DCP-ran-CP) were prepared with high molecular weight control (M _w = 200 000-500 000) using dichloro(3-phenyl-1H-inden-1-ylidene)bis(tricyclohexylphosphine)ruthenium(ii). Next, carbon black, zinc oxide and other additives were blended into the pristine polymers using a mixer and twin roll rubber mills at 50 °C, followed by vulcanization in metal molds at 160 °C for 10 min, resulting in molded black rubber specimens. Cross

SUBMITTER: Hayano S 

PROVIDER: S-EPMC11577345 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature