Quantitative Evaluation of the Gibbs-Dimarzio Theory of the Glass Transition for Polystyrene

  • A. R. Greenberg
  • R. P. Kusy

Abstract

The applicability of the Gibbs-DiMarzio (G-DM) theory of the glass transition (Tg) is quantitatively evaluated for polystyrene (PS). The analysis was conducted under the assumption that both the inter- intramolecular energy ratio (r) and the effective chain segment density (n) remain constant while the fractional free volume at Tg(Vo) varies as a function of the reciprocal degree of polymerization (103/P). Based upon reduced parametric plots of Tg/Tg∞ versus 103/P, the results showed that the G-DM equations were satisfactory for PS; when 0.015 ≦ Vo ≦ 0.045, optimum agreement occurred at n = 1.80, r = 1.05.

Keywords

Polystyrene Vinyl Calorimetry PMMA Boulder 

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Copyright information

© Plenum Press, New York 1984

Authors and Affiliations

  • A. R. Greenberg
    • 1
  • R. P. Kusy
    • 2
  1. 1.Dept. of Mechanical EngineeringUniversity of Colorado BoulderUSA
  2. 2.Dental Research CenterUniv. of North Carolina Chapel HillUSA

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