Fabrication of polymethylphenylsiloxane decorated C60 via π-π stacking interaction for reducing the flammability of silicone rubber

Abstract The free-radical trapping capability of buckminsterfullerene (C 60 ) inevitably inhibits peroxide vulcanization, which is one of the most challenges for its application in high temperature vulcanized silicone rubber (HTVSR). In this work, polymethylphenylsiloxane decorated C 60 (PMPS-d-C 60 ) was fabricated via π-π stacking interaction and incorporated into HTVSR. It was found that PMPS-d-C 60 not only overcame the negative effect of C 60 on HTVSR vulcanization, but also effectively enhanced the flame retardancy of HTVSR. By adding only 4.0 phr PMPS-d-C 60 , the limiting oxygen index of HTVSR was increased to 29.0%, and its peak of heat release rate was reduced more than 32%.