Low-angle laser light scattering from polystyrene solutions: intensity measurements and photon correlation spectroscopy |
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Authors: | Eyüp Ozdemir Randal W. Richards |
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Affiliation: | Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow G1 1XL, UK |
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Abstract: | Light scattering measurements have been made on polystyrenes with a range of molecular weights in toluene and for one polystyrene with a range of molecular weights in toluene and for one polystyrene in a range of solvents including a theta solvent. Intensity data were used to calculate second virial coefficients and molecular weights, whilst photon correlation spectroscopy was used to calculate diffusion coefficients. All measurements were made at 30°C and at a scattering angle of ca.4°. The data were used to examine current theories of polymer diffusion and the relation between hydrodynamic radius (RH) and radius of gyrations (). The results support accepted theories of polymer diffusion, but suggest that the relation between RH and requires further analysis. |
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Keywords: | Light scattering diffusion viscosity polystyrene photon correlation spectroscopy intensity measurements |
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