Polymer translational diffusion: 2. Non-theta solutions,polystyrene in butan-2-one |
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Authors: | TA King A Knox JDG McAdam |
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Affiliation: | Physics Department, Schuster Laboratory, University of Manchester, Manchester M13 9PL, UK |
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Abstract: | The diffusion of linear polystyrene under non-theta conditions in butan-2-one has been studied by Rayleigh light scattered linewidth measurements for the molecular weight range of 2.08 × 106 to 8.7 × 106 and as a function of concentration. By extrapolation of diffusion coefficient values to zero concentration we find that . The first order concentration dependence changes sign as the molecular weight increases, being fairly small and negative at low molecular weights and increasingly positive above . |
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