A model-free analysis of configurational properties to reduce the temperature- And pressure-dependent segmental relaxation times of polymers

Xiao Zhao, Sindee L. Simon

Research output: Contribution to journalArticle

Abstract

The segmental relaxation time data for poly(vinyl acetate), poly(vinyl chloride), and linear and star polystyrene are analyzed using a model-free method to determine how the temperature- and pressure-dependent relaxation times, τ, scale with the relative configurational thermodynamic properties. The model-free method assumes no specific mathematical form, such as reciprocal linearity, and the configurational properties are referred to an isochronal state to eliminate the bias associated with the definition of the ideal glassy state. The scaling ability of a given configurational property is strongly material-dependent with the logarithm of τ scaling better with TSc and Hc for poly(vinyl acetate), with TSc, Hc, and Uc for poly(vinyl chloride), and with TSc, Hc, and Vc for linear and star polystyrene. The choice of the isochronal reference state does not qualitatively affect the results.

Original languageEnglish
Article number044901
JournalJournal of Chemical Physics
Volume152
Issue number4
DOIs
StatePublished - Jan 31 2020

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