Scaling out the density dependence of the α relaxation in glass-forming polymers

By C. Alba-Simionesco, A. Cailliaux, Á. Alegría, Gilles Tarjus. 2004

187 citations recorded by the source corpus.

We show that the density and temperature dependences of the α-relaxation time of several glass-forming polymers can be described through a single scaling variable X = e(ρ)/T, where e(ρ) is well fitted by a power law ρx, x being a species-specific parameter. This implies that “fragility” is an intrinsic, density-independent property of a glass-former characterizing its super-Arrhenius slowing-down of relaxations, and it leads us to propose a modification of the celebrated Angell plot.

Subfields: Electronic, Optical and Magnetic Materials, Materials Chemistry, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/572de74d388667a901f05b5ecf5b2c276b56370d