Title: Self-Diffusion in Polymer Solutions: A Test for Scaling and Reptation
Abstract:We present preliminary results on the self-diffusion coefficient ${D}_{\mathrm{self}}$ of polystyrene chains (molecular weight ${M}_{n}=245000 \mathrm{and} 123000$) in benzene, obtained by forced Rayl...We present preliminary results on the self-diffusion coefficient ${D}_{\mathrm{self}}$ of polystyrene chains (molecular weight ${M}_{n}=245000 \mathrm{and} 123000$) in benzene, obtained by forced Rayleigh scattering. In the semidilute regime where the chains overlap, ${D}_{\mathrm{self}}$ decreases with the polymer concentration $c$ as ${c}^{\ensuremath{-}1.7\ifmmode\pm\else\textpm\fi{}0.1}$. This behavior is compatible with scaling-law predictions and is the first experimental evidence for the existence of reptation in this regime.Read More
Publication Year: 1979
Publication Date: 1979-06-18
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 121
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