Volume Effects on the Glass Transition Dynamics
Soft Condensed Matter
2009-11-11 v1
Abstract
The role of jamming (steric constraints) and its relationship to the available volume is addressed by examining the effect that certain modifications of a glass-former have on the ratio of its isochoric and isobaric activation enthalpies. This ratio reflects the relative contribution of volume (density) and temperature (thermal energy) to the temperature-dependence of the relaxation times of liquids and polymers. We find that an increase in the available volume confers a stronger volume-dependence to the relaxation dynamics, a result at odds with free volume interpretations of the glass transition.
Cite
@article{arxiv.cond-mat/0601388,
title = {Volume Effects on the Glass Transition Dynamics},
author = {C. M. Roland and K. J. McGrath and R. Casalini},
journal= {arXiv preprint arXiv:cond-mat/0601388},
year = {2009}
}
Comments
9 pages 5 figures