期刊
PHYSICAL REVIEW LETTERS
卷 89, 期 12, 页码 -出版社
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.89.125501
关键词
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We examine the local geometry of a simulated glass-forming polymer melt. Using the Voronoi construction, we find that the distributions of Voronoi volume P(u(v)) and asphericity P(a) appear to be universal properties of dense liquids, supporting the use of packing approaches to understand liquid properties. We also calculate the average free volume [u(f)] along a path of constant density and find that [u(f)] extrapolates to zero at the same temperature T-0 that the extrapolated relaxation time diverges. We relate [u(f)] to the Debye-Waller factor, which is measurable by neutron scattering.
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