Characterization of PDLCs composed of the single liquid crystal component, K21, in a thiol-ene-based polymer

Joe B. Whitehead Jr.; Nicole L. Gill

doi:10.1117/12.449949

11 December 2001 Characterization of PDLCs composed of the single liquid crystal component, K21, in a thiol-ene-based polymer

Joe B. Whitehead Jr., Nicole L. Gill

Author Affiliations +

Proceedings Volume 4463, Liquid Crystals V; (2001) https://doi.org/10.1117/12.449949
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

This paper investigates the effects of cure temperature and composition on the morphology of polymer dispersed liquid crystals (PDLCs) composed of the liquid crystal, K21 (4-heptyl-4'-cyanobiphenyl), in a thiol-ene based pre-polymer. PDLCs are composites composed of micron-size liquid crystal droplets dispersed in a solid polymer matrix. The PDLCs were fabricated by photo-initiated, polymerization induced phase separation using a differential photo-calorimeter (DPC). The cure temperatures were chosen based on the temperature-composition phase diagrams of the liquid crystal/pre-polymer mixtures. The characterization of the PDLCs included differential scanning calorimeter (DSC) to determine the nematic-to-isotropic transition temperature (T_NI) of the liquid crystal and the glass transition temperature (Tg) of the polymer matrix. Scanning electron microscopy (ESEM) was used to examine phase separated morphology.

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Joe B. Whitehead Jr. and Nicole L. Gill "Characterization of PDLCs composed of the single liquid crystal component, K21, in a thiol-ene-based polymer", Proc. SPIE 4463, Liquid Crystals V, (11 December 2001); https://doi.org/10.1117/12.449949

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