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29 March 2024
 
  » arxiv » cond-mat/0404040

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Scaling out the density dependence of the $alpha$ relaxation in glassforming polymers
C. Alba-Simionesco ; A. Cailliaux ; A. Alegria ; G. Tarjus ;
Date 2 Apr 2004
Subject Soft Condensed Matter | cond-mat.soft
AbstractWe show that the density and temperature dependences of the $alpha$-relaxation time of several glassforming polymers can be described through a single scaling variable $X=e( ho)/T$, where $e( ho)$ is well fitted by a power law $ ho^x$, $x$ being a species-specific parameter. This implies that ``fragility’’ is an intrinsic, density-independent property of a glassformer characterizing its super-Arrhenius slowing down of relaxations, and it leads us to propose a modification of the celebrated Angell plot.
Source arXiv, cond-mat/0404040
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