Modelling of the Formation of Non-Uniform Polymer Networks in Devices

Autor:	E. P. Raynes, N. Dessaud
Rok vydání:	2004
Předmět:	chemistry.chemical_classification Molecular diffusion Materials science Diffusion Mesogen Analytical chemistry General Chemistry Polymer Condensed Matter Physics chemistry.chemical_compound Monomer chemistry Polymerization Liquid crystal Molecule General Materials Science
Zdroj:	Molecular Crystals and Liquid Crystals. 410:475-485
ISSN:	1563-5287 1542-1406
DOI:	10.1080/15421400490433523
Popis:	Polymer Stabilised Liquid Crystal (PSLC) devices contain a polymer network (PN) formed from a liquid crystal host containing a low concentration of reactive liquid crystalline monomers. If a strongly UV absorbing liquid crystal is used, the UV intensity profile during polymerisation creates a non-uniformity in the polymerisation process and the final polymer distribution across the cell [1]. A theoretical model of the polymerisation process of the reactive mesogen molecules is presented which takes into account the UV intensity profile, the rate of polymerisation and molecular diffusion. The PN distribution has been calculated using realistic reaction parameters, diffusion constants and UV absorption coefficients for both a UV absorbing (E7) and a non-absorbing (ML1001) liquid crystal. SEM observations and optical microscopy were carried out and are found to support the numerical predictions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7d0b612991993acd3a49606480c78825 https://doi.org/10.1080/15421400490433523 Zobrazit plný text záznamu