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Temperature dependence of tracer diffusion coefficients in polystyrene

Published online by Cambridge University Press:  03 March 2011

Peter F. Green  and
Edward J. Kramer
Peter F. Green
Affiliation:
Department of Materials Science and Engineering and the Materials Science Center, Cornell University, Ithaca, New York 14853
Edward J. Kramer
Affiliation:
Department of Materials Science and Engineering and the Materials Science Center, Cornell University, Ithaca, New York 14853
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Abstract

The temperature dependence of the tracer diffusion coefficient D* of long deuterated polystyrene (d-PS) chains of molecular weight M>Mc, where Mc is the critical molecular weight for entanglement, diffusing into highly entangled PS matrices, each of molecular weight P = 2×107, is studied using forward recoil spectrometry. It is found that the temperature dependence of D*/T, reflected primarily in the monomeric friction coefficient, is accurately described by a Vogel equation. The constants that are used to fit these results are independent of M and are the same as those used to fit the temperature dependence of the zero shear rate viscosity of polystyrene.

Type
Articles
Information
Journal of Materials Research , Volume 1 , Issue 1 , February 1986 , pp. 202 - 204
Copyright
Copyright © Materials Research Society 1986

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References

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