| 摘要 |
PURPOSE:To increase the refractive index by copolymerizing cyclohexyl methacrylate with alpha-methylstyrene in a specified ratio. CONSTITUTION:Cyclohexyl methacrylate represented by structural formula I is copolymerized with alpha-methylstyrene represented by structural formula II in 90:10-60:40 weight ratio. The refractive index of the resulting copolymer is increased in accordance with increase in the percentage of alpha-methylstyrene, yet when >40wt% alpha-methyl styrene is contained in the copolymer, the copolymer becomes fragile and unpractical. When the percentage of alpha-methylstyrene is <10wt%, the refractive index is reduced to <=1.50. |
