Premium
Modeling of the isobaric and isothermal glass transitions of polystyrene
Author(s) -
Grassia Luigi,
Carbone Maria Giovanna Pastore,
D'Amore Alberto
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.34789
Subject(s) - isobaric process , polystyrene , isothermal process , scaling , exponent , relaxation (psychology) , thermodynamics , glass transition , scaling law , materials science , phenomenological model , dispersion (optics) , polymer science , statistical physics , physics , polymer , condensed matter physics , composite material , mathematics , philosophy , optics , psychology , social psychology , linguistics , geometry
The scaling law for relaxation times (τ's) recently proposed by Casalini and Roland was used in the framework of Kovacs, Aklonis, Hutchinson, and Ramos phenomenological theory. With this approach, it was shown that both the isobaric and the isothermal glass transitions of polystyrene can be reliably predicted with only two fitting parameters, namely, τ in the reference state and the fractional exponent that describes the dispersion of the α relaxation. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011