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The effect of molecular weight on glass‐transition temperatures (compositional variation of glass‐transition temperatures 3)

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1 Author(s)
Couchman, P.R. ; Department of Mechanics and Materials Science, Rutgers University, New Brunswick, New Jersey 08903

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A predictive equation for the influence of chain ends on glass‐transition temperatures is derived from a thermodynamic theory for the compositional variation of Tg. This relation is found to give excellent agreement with results for the effect in polystyrene, and produces a convenient and accurate first approximation. Secondary approximations to the principal equation are formally identical to the Ueberreiter‐Kanig and Fox‐Flory equations for the variation of Tg with molecular weight.

Published in:

Journal of Applied Physics  (Volume:50 ,  Issue: 10 )