Phenylacetylene Liquid Crystalline Compounds with High Birefringence

Abstract

We studied photopolymerizable 3-ring phenylacetylene diacryrate monomers and polymers. The monomers exhibited nematic phase and high Δn around 0.35. The homogeneous alignment polymes were obtained by UV iradiation of these monomers. Δn of polymers were affected by polymerization temperatures. Wide nematic range monomers are useful for obtaining of higher Δn polymers.