Plastics manufacturers typically use a variety of organic peroxides as polymer media to synthesize thermoplastic polymers. Such as polyvinyl chloride, polystyrene, LDPE (low density polyethylene), EVA (ethylene-vinyl acetate copolymer), polymethyl methacrylate, etc. The oxygen bonds in organic peroxides readily release free radicals through thermal reactions, which act as initiators of free radical polymerization reactions.