Effect of nature and degree of crosslinking agent of poly(hydroxy-butyl-methacrylate-co-2-ethyl-hexyl-acrylate) networks on the swelling properties in nematic liquid crystal 5CB

Autor:	M. Habchi, B. Dali Youcef, T. Mellal
Rok vydání:	2020
Předmět:	Materials science Composite number General Physics and Astronomy Education chemistry.chemical_compound Monomer chemistry Liquid crystal Polymer chemistry medicine Copolymer Irradiation Swelling medicine.symptom Bifunctional Photoinitiator
Zdroj:	Revista Mexicana de Física. 66:617-626
ISSN:	2683-2224 0035-001X
DOI:	10.31349/revmexfis.66.617
Popis:	We experimentally measured the effect of nature and concentration of crosslinker on the photopolymerized time of the poly(hydroxy-butyl-methacrylate-co-2-ethyl-hexyl-acrylate)/5CB system. Initial mixtures are composed of monofunctional monomers hydroxy-butyl-methacrylate (HBMA) and 2-ethyl-hexyl-acrylate (2-EHA), and one of the three bifunctional monomers, poly-propylene-glycol-di-acrylate (PPGDA), tri-propylene-glycol-di-acrylate (TPGDA), or 1,6-hexane-diol-di-acrylate (HDDA), and 2-hydroxy-2-methylpropiophenone (Darocur 1173) as a photoinitiator. The copolymers were elaborated via UV irradiation of reactive formulation. The central composite face-centered design of experiments (DoE) has been used to determine the influence of temperature, crosslinking density and their interactions on swelling behavior of poly(HBMA-co-EHA/crosslinker) networks in liquid crystal 5CB. The experimental results and the predicted responses indicate a good correlation and therefore the validity of the used model.
Databáze:	OpenAIRE
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