Water sorption into poly[(2-hydroxyethyl methacrylate)-co-(1-vinyl-2-pyrrolidone]at 310 K

Malak, M., Hill, D. J. T. and Whittaker, A. K. (2003) Water sorption into poly[(2-hydroxyethyl methacrylate)-co-(1-vinyl-2-pyrrolidone]at 310 K. Polymer International, 52 11: 1740-1748. doi:10.1002/pi.1284

Author Malak, M.
Hill, D. J. T.
Whittaker, A. K.
Title Water sorption into poly[(2-hydroxyethyl methacrylate)-co-(1-vinyl-2-pyrrolidone]at 310 K
Formatted title
Water sorption into poly[(2-hydroxyethyl methacrylate)-co-(1-vinyl-2-pyrrolidone)]at 310 K
Journal name Polymer International   Check publisher's open access policy
ISSN 0959-8103
Publication date 2003-11
Sub-type Article (original research)
DOI 10.1002/pi.1284
Volume 52
Issue 11
Start page 1740
End page 1748
Total pages 9
Place of publication UK
Publisher John Wiley
Collection year 2003
Language eng
Subject C1
250502 Physical Chemistry of Macromolecules
780103 Chemical sciences
Abstract Poly(2-hydroxyethyl methacrylate) and copolymers of 2-hydroxyethyl methacrylate (HEMA) and 1-vinyl-2-pyrrolidone (VP) in the form of cylindrical samples (approximate to8mm x 20mm) have been prepared and the sorption of water into these cylinders has been studied by the mass-uptake methods and by magnetic-resonance imaging. The equilibrium water contents for the cylinders were found to vary systematically with the copolymer composition. Diffusion of water into the cylinders was found to follow Fickian behaviour for cylinders with high HEMA contents, with the diffusion coefficients obtained from mass-uptake studies dependent on the copolymer composition, varying from 1.7 x 10(-11) m(2) s(-1) for poly(HEMA) to 2.0 x 10(-11) m(2) s(-1) for poly(HEMA-co-VP) with a composition of 1:1. However, NMR-imaging studies showed that, while the profiles of the water diffusion fronts for cylinders with high HEMA contents were Fickian, that for the 1:1 copolymer was not and indicated that the mechanism was Case III. The polymers which were rich in VP were characterized by a water-sorption process which follows Case-III behaviour. (C) 2003 Society of Chemical Industry.
Keyword Polymer Science
Biomedical Hema-vp Copolymers
Water-mass Uptake
Nmr Imaging
Equilibrium Water Content
Diffusion Coefficients
Anomalous Behaviour
2-hydroxyethyl Methacrylate
Q-Index Code C1

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Created: Wed, 15 Aug 2007, 01:50:12 EST