광학용 황 함유 고 굴절 고분자의 개발 및 특징

Abstract

Optical polymeric materials with high refractive indices have been widely developed for glass fiber reinforced composite. The refractive indices of polymers matrix and glass fibers ought be well matched to develop optical transparency. In this study, a new development in thermoplastic and thermosetting polymers were examined : synthesis and characterization of a poly(cyclohexylthioacrylate) and a curing agent containing a thioether groups in a polymer matrix with a high refractive index. On the first part, the poly(cyclohexylthioacrylate) was synthesized by the free radical polymerization of cyclohexylthioacrylate. Transparent polymer films, fabricated by spin-coating from the polymer solution, exhibited a high refractive index of 1.55244 at 637 nm and low birefringence of 0.0001. The thermal decomposition temperature (Td) of the polymer was in the range of 355-363 ℃, which indicates good thermal stability, while its glass transition temperature was 65 ℃. Secondly, the curing agents contained a thioether and sulfone groups in a epoxy matrix were synthesized due to the fact that the general approach to increasing the refractive index of a polymer is by the introduction of substituents with high molar refraction, low molar volume, or high density according to the Lorentz-Lorenz formula. For the epoxy films, epoxy mold was used and that showed a high refractive index of 1.6437 with sulfonyl diamine and 1.6548 with disulfonyl diamine at 656 nm.