Depolymerization of vulcanized poly(cyclopentene), poly(norbornene--cyclopentene) and poly(-dicyclopentadiene--cyclopentene) rubbers ring-closing metathesis depolymerization for monomer recycling.

Herein, we report a study on the preparation, properties, and depolymerization of pristine and vulcanized poly(cyclopentene) (poly(CP)), poly(norbornene--cyclopentene) (poly(NB--CP)) and poly(-dicyclopentadiene--cyclopentene) (poly (DCP--CP)). First, poly(CP), poly(NB--CP) and poly(DCP--CP) were prepared with high molecular weight control ( = 200 000-500 000) using dichloro(3-phenyl-1-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.

Enhanced electric double-layer capacitance by desolvation of lithium ions in confined nanospaces of microporous carbon.

Carbon electrodes with specific microporous structures are strongly desired to improve the performance of electric double-layer capacitors (EDLCs). We report solvated states of Li ions in confined carbon micropores affecting specific capacitance. The average Li(+) solvation number of 1 M LiClO4/propylene carbonate (PC) electrolyte introduced into porous carbon electrodes was determined using Raman spectroscopy and (7)Li NMR.