Glass transition theory based on stress relaxation

Details Glass transition theory based on stress relaxation Glass transition theory based on stress relaxation

2005-12-03

arxiv.org/abs/cond-mat/0512065v2

Journal of Physics: Condensed Matter 18, L251 (2006)

Physics

Condensed Matter

Materials Science

Scientific paper

10.1088/0953-8984/18/19/L04

We propose that an onset of glass transition can be defined as the point at which a supercooled liquid acquires the stress relaxation mechanism of a solid glass. We translate this condition into the rate equation for local relaxation events. This equation simultaneously gives two main signatures of glass transition, stretched-exponential relaxation and the Vogel-Fulcher law. The proposed theory quantifies system fragility in terms of the number of retarded local relaxation events and reproduces its correlation with the non-exponentiality of relaxation and bonding type.

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