Plastic optical fiber, optical fiber cable, plug optical fiber cable, manufacturing method of methyl methacrylate polymer and method for manufacturing plastic optical fiber

摘要

In the method of producing methyl methacrylate polymer, a monomer containing 80% by weight of methyl methacrylate and a radical polymerization initiator represented by the following formula (III) are supplied to the reaction vessel, and the polymerization initiator concentration and the polymerization temperature are specific relationships A polymerization step for filling and polymerizing at a polymerization temperature of 1100.degree. C. to 160.degree. C., a supply process for supplying a reaction mixture taken out from the reaction tank to a volatile removal step, and a volatile removal step for separating and removing volatiles from the reaction mixture are performed. This method can provide a methyl methacrylate polymer having excellent optical properties and a plastic optical fiber excellent in transmission performance.