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Scaling laws and polystyrene networks - a quasi-elastic light-scattering study

Davidson, N.S. and Richards, R.W. and Geissler, E. (1985) Scaling laws and polystyrene networks - a quasi-elastic light-scattering study. Polymer, 26 (11). pp. 1643-1646. ISSN 0032-3861

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Abstract

Randomly crosslinked networks with a range of crosslink densities were prepared by γ-irradiation. Quasielastic light scattering measurements were made on the gels swollen to equilibrium in cyclohexane at 308, 318 and 333 K. The longitudinal osmotic modulus Mos was obtained from the intensity of the dynamically scattered light, and the cooperative diffusion coefficient Dc calculated from the relaxation rate of the autocorrelation function. The concentration dependence of these parameters at the theta temperature was found to be consistent with the scaling predictions, but at higher temperatures where excluded volume conditions prevail, deviations from scaling behaviour were observed. These discrepancies are probably caused by defects in the network structure.

Item type: Article
ID code: 37932
Keywords: scaling, networks, light scattering, polystyrene, Physical and theoretical chemistry, Organic Chemistry, Polymers and Plastics
Subjects: Science > Chemistry > Physical and theoretical chemistry
Department: Faculty of Science > Pure and Applied Chemistry
Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 27 Feb 2012 14:30
    Last modified: 05 Sep 2014 00:29
    URI: http://strathprints.strath.ac.uk/id/eprint/37932

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