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Measurement of thermal diffusion parameters of polystyrene using a thermal field flow fractionation method

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Abstract

Thermal diffustor parameters such as the thermal diffusion factor and the thermal diffusion coefficient for polystyrene in toluene are measured by using a thermal field flow fractionation (TFFF) method The dependence of these parameters upon temperature concentration and polymer molecular weight is ex-amined.

The thermal diffusion coefficien is found to be independent of the molecular weight for sufficiently large polymer molecules but on the other hand the ordinary diffusion coefficient is known to be pronouncedly dependent on the molecular weight.

This result indicates that the fractionation effect is primarily governed by the differences in ordinary dif-fusion coefficients.

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Authors and Affiliations

  1. Department of Chemical Engineering, Korea Advanced Institute of Science and Technology, Chongrvang, P.O. Box 131, Seoul, Korea

    Ki-Chang Song, Eun-Kee Kim & In-Jae Chung

Authors
  1. Ki-Chang Song
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  2. Eun-Kee Kim
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  3. In-Jae Chung
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Song, KC., Kim, EK. & Chung, IJ. Measurement of thermal diffusion parameters of polystyrene using a thermal field flow fractionation method. Korean J. Chem. Eng. 3, 171–175 (1986). https://doi.org/10.1007/BF02705029

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  • DOI: https://doi.org/10.1007/BF02705029

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