METHOD FOR MANUFACTURING PLASTIC OPTICAL TRANSMISSION MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a plastic optical transmission material which is capable of sufficiently degrading the transmission loss in a plastic optical fiber, etc. SOLUTION: In the method for manufacturing the plastic optical transmission material obtained by copolymerizing two kinds of monomers having reactivity ratios r1 and r2 satisfying the following equation r1×r2<0.8 or r1×r2>1.2 and having r1 smaller than 1 and r2 greater than 1, the monomer having the lower reactivity ratio is added to the material at >=20 to <100 pts.wt. when the reactivity ratios r1 and r2 satisfy r1/r2>=10 and at 100 to 500 pts.wt. when the reactivity ratios satisfy r/r2<10 per 100 pts.wt. monomer having the higher reactivity ratio of two kinds of the monomers. Two kinds of the monomers are so copolymerized that the degree of polymerization of the copolymer obtained by the copolymerization reaction of two kinds of the monomers attains <=97 wt.% when the reactivity ratios r1 and r2 satisfy r1/r2>=10 and attains <=92 wt.% when the reactivity ratios satisfy r1/r2<10.