Acrylic acid derivative compounds and polymeric liquid crystal obtained by polymerizing the same

摘要

The present invention provides a photopolymerizable liquid crystal monomer having high durability, a low melting point and an enantiotropic property.The photopolymerizable liquid crystal monomer is a 4-(4-(alkyloxycarbonyloxy)benzoyloxy)phenyl acrylate represented by the following formula A [wherein Ph is a 1,4-phenylene group, and R is an alkyl group]:Further, the present invention provides a polymer liquid crystal obtained by polymerizing a composition containing the monomer.Further, the present invention provides an optical element employing the polymer liquid crystal, and an optical head employing the optical element as a polarizing hologram element.