New generalized model based on Onsager's transport equations for describing PDLC’s morphology

Vincent Rachet; Patrick Feneyrou; Pierre L. Le Barny; Brigitte Loiseaux; Jean-Pierre Huignard

doi:10.1117/12.562629

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15 October 2004 New generalized model based on Onsager's transport equations for describing PDLC's morphology

Vincent Rachet, Patrick Feneyrou, Pierre L. Le Barny, Brigitte Loiseaux, Jean-Pierre Huignard

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Proceedings Volume 5518, Liquid Crystals VIII; (2004) https://doi.org/10.1117/12.562629
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

Electro-optical properties of polymer dispersed liquid crystal (PDLC) or holographic polymer dispersed liquid crystal (H-PDLC) are very sensitive to the photoinduced phase separation process (PIPS). In order to improve initial mixture and recording setup, real time monitoring of diffraction efficiency is currently performed using a diffusion model based on the moderation Fick's law. Nevertheless, this model does not take into account neither change of affinity for liquid crystal molecules when the monomer polymerization occurs nor the droplets morphology observed by scanning electron microscopy. In this paper, a new model consistent with the general Onsager theory of transport is introduced. As an application, droplet's growth and spatial response of H-PDLC films are described using dimensionless numbers and very general normalized parameters which open new method of improvement for electro-optical devices based on PDLC's or H-PDLC's.

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Vincent Rachet, Patrick Feneyrou, Pierre L. Le Barny, Brigitte Loiseaux, and Jean-Pierre Huignard "New generalized model based on Onsager's transport equations for describing PDLC's morphology", Proc. SPIE 5518, Liquid Crystals VIII, (15 October 2004); https://doi.org/10.1117/12.562629

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