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Study of in‐situ photopolymerization of chiral liquid crystal acrylate

He Liu, Shufan Zhang, Shunzi Jin, Zongneng Qi

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Abstract

Abstract The effect of the smectic and isotropic phase on the photo‐polymerization of the chiral liquid crystalline 4‐acryloxy‐undecanyloxy‐4′‐[S(−)‐2‐methylbutyloxy]‐biphenyl (monomer (I)) was studied using FTIR. The effect of temperature on the birefringence of surface‐oriented monomer (I) and its polymer obtained by in‐situ photopolymerization was also investigated. The results show that photopolymerization in the isotropic phase proceeds at a higher rate than in the smectic phase, when monomer conversion is less than 60%; however, when monomer conversion is above 60%, the photopolymerization rate is independent of the initial phase state of monomer (I), and a highly oriented liquid crystalline polyacrylate film can be prepared by in‐situ photopolymerization of the surface‐oriented chiral acrylate (I).

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What this paper is about

Abstract The effect of the smectic and isotropic phase on the photo‐polymerization of the chiral liquid crystalline 4‐acryloxy‐undecanyloxy‐4′‐[S(−)‐2‐methylbutyloxy]‐biphenyl (monomer (I)) was studied using FTIR. The effect of temperature on the birefringence of surface‐oriented monomer (I) and its polymer obtained by in‐situ photopolymerization was also investigated. The results show that photopolymerization in the isotropic phase proceeds at a higher rate than in the smectic phase, when monomer conversion is less than 60%; however, when monomer conversion is above 60%, the photopolymerization rate is independent of the initial phase state of monomer (I), and a highly oriented liquid crystalline polyacrylate film can be prepared by in‐situ photopolymerization of the surface‐oriented chiral acrylate (I).

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Available abstract

Abstract The effect of the smectic and isotropic phase on the photo‐polymerization of the chiral liquid crystalline 4‐acryloxy‐undecanyloxy‐4′‐[S(−)‐2‐methylbutyloxy]‐biphenyl (monomer (I)) was studied using FTIR. The effect of temperature on the birefringence of surface‐oriented monomer (I) and its polymer obtained by in‐situ photopolymerization was also investigated. The results show that photopolymerization in the isotropic phase proceeds at a higher rate than in the smectic phase, when monomer conversion is less than 60%; however, when monomer conversion is above 60%, the photopolymerization rate is independent of the initial phase state of monomer (I), and a highly oriented liquid crystalline polyacrylate film can be prepared by in‐situ photopolymerization of the surface‐oriented chiral acrylate (I).

Key concepts: Photopolymer, Monomer, Acrylate, Materials science, Acrylate polymer, Polymerization, Liquid crystal, Phase (matter)

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