Swelling equilibrium and preferential sorption of crosslinked poly(methyl methacrylate) in the mixture acetonitrile + n-butanol期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Swelling equilibrium and preferential sorption of crosslinked poly(methyl methacrylate) in the mixture acetonitrile + n-butanol

Authors:	R. M. Masegosa M. A. Llorente M. G. Prolongo I. Hernández-Fuentes A. Horta

Affiliation:	(1) Present address: Departamento de Química Física, Facultad de Quimicas, Universitad Complutense, Madrid, Spain;(2) Departamento de Química General y Macromoléculas de Ciencias, Universidad a Distancia (UNED), Madrid, Spain

Abstract:	Measurements of preferential sorption,(₃), determined by refractometry, and swelling equilibrium,₃^–1, of PMMA networks have been carried out in the cosolvent mixture MeCN+BuOH at 25 and 49 C. With an intermediate mixture composition,₃^–1 passes through a maximum at both temperatures. At 25 C MeCN is preferentially adsorbed by the network over most of the composition range, but a small inversion is detected. At 49 C MeCN is preferentially adsorbed over all the composition range.The behavior of the system crosslinked PMMA/MeCN + BuOH is compared with the results obtained for solutions of linear PMMA in mixtures formed by the same two solvents, MeCN and BuOH.

Keywords:	Preferential sorption polymer networks crosslinked poly(methyl methacrylate) swelling equilibrium
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