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Relationships between glass transition temperature and conversion

Analyses of limiting cases

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Summary

The Couchman approach to the expression of the compositional variation of glass transition temperature (or the Di-Benedetto equation) can be used to evaluate the effect of molecular weight on Tg for a stepwise linear polymer. An expression for the KL constant in the Fox-Flory equation is proposed. It is also possible to estimate the TgL corresponding to the hypothetical linear structure defined in a three-dimensional network. For different epoxy-diamine systems, we have found a good concordance with the results obtained previously using an additive law.

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Authors and Affiliations

  1. Laboratoire des Matériaux Macromoléculaires, URA CNRS no 507, Institut National des Sciences Appliquées, 20 Avenue A. Einstein, F-69621, Villeurbanne Cedex, France

    J. P. Pascault

  2. Institute of Materials Science and Technology (INTEMA), University of Mar del Plata and National Research Council (CONICET), 7600, Mar del Plata, Argentina

    R. J. J. Williams

Authors
  1. J. P. Pascault
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  2. R. J. J. Williams
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Pascault, J.P., Williams, R.J.J. Relationships between glass transition temperature and conversion. Polymer Bulletin 24, 115–121 (1990). https://doi.org/10.1007/BF00298330

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