The plastic optical fiber of this invention has a core comprising a copolymer which comprises, as the essential constituents, a (meth)acrylic ester I represented by the following formula [I]
wherein R₁ denotes hydrogen or methyl; a (meth)acrylic ester II represented by the following formula [II]
wherein R2₂denotes hydrogen or methyl, and R₃ denotes C₁-C₈ alkyl, cycloalkyl, or aromatic group; and a multifunctional monomer. The core being formed by heat-curing of the thermosetting resin composition, it provides for a plastic optical fiber with an effect of excellency in the thermal resistance and the mechanical strength. Further, since a fibered polymer can be obtained without a drawing step according to this invention, it gives also an effect of decreasing the light transmission loss caused by a drawing step for plastic optical fibers of the prior art.
本发明的塑料光纤的芯部由共聚物组成,共聚物的基本成分包括由下式[I]表示的(甲基)
丙烯酸酯 I;由下式[II]表示的(甲基)
丙烯酸酯 II。
其中 R₁ 表示氢或甲基;由下式[II]表示的(甲基)
丙烯酸酯 II
其中 R2₂ 表示氢或甲基,R₃ 表示 C₁-C₈ 烷基、环烷基或芳香基;以及一种多功能单体。通过热固性
树脂组合物的热固化形成的纤芯,使塑料光纤具有优异的耐热性和机械强度。此外,由于根据本发明无需拉丝步骤即可获得纤维状聚合物,因此还可减少现有技术中塑料光纤因拉丝步骤而造成的光传输损失。