Layer-by-layer photopolymerization of liquid crystal polymers at low ultraviolet power
Solovjev V. S. 1, Raschepkina N. A. 2, Keshtov M. L. 3, Timoshenkov S. P. 1
1Moscow Institute of Electronic Technology, Moscow, Zelenograd, Russia
2Samara State Technical University, Samara, Russia
3Moscow Institute of Organoelement Compounds, Moscow, Russia
Email: solov_06_v@mail.ru
Layer-by-layer photopolymerization of a mixture of liquid crystal diacrylate, methacrylate, and acrylate was studied using IR 651 as a photoinitiator. It was shown that the helical pitch of the cholesteric liquid crystal polymer depends on the concentration of optically active acrylate. With decreasing UV irradiation intensity, a significant change in the concentration of optically active acrylate in various layers of the polymerized composition was observed, both increasing and decreasing from the initial concentration, leading to a broadening of the spectrum of light reflected from the thin polymerized layer. Keywords: cholesteric liquid crystals, liquid crystal polymers, photopolymerization, reflectance spectrum width, ultraviolet radiation. Keywords: cholesteric liquid crystals, liquid crystal polymers, photopolymerization, reflectance spectrum width, ultraviolet radiation.
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