Molecular thermodynamic model for solvent-induced glass transitions in polymer-supercritical fluid systems

Nikolaos S. Kalospiros, Michael E. Paulaitis

Research output: Contribution to journalArticle

Abstract

A molecular thermodynamic approach is described for predicting polymer glass transition temperatures as a function of the amount of gas sorbed by the polymer. The predictive model is based on a lattice theory of polymer solutions and the concept of order parameters, the use of which has been important in the development of macroscopic models and phenomenological analyses of glass transitions. A general definition of the solvent-induced glass transition is given, and then applied within the framework of this lattice model and its order parameters to predict glass transition temperatures for several polymer-compressed CO2 mixtures. The model is also used to examine a new experimental observation described as retrograde vitrification.

Original languageEnglish (US)
Pages (from-to)659-668
Number of pages10
JournalChemical Engineering Science
Volume49
Issue number5
DOIs
StatePublished - 1994
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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