Dudowicz, J.
, Freed, K.
and Douglas, J.
(2005),
Fragility of Glass-Forming Polymer Liquids, Journal of Physical Chemistry B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852482
(Accessed December 5, 2024)
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Fragility of Glass-Forming Polymer Liquids
Published
Author(s)
J Dudowicz, Karl Freed,
Abstract
Many fluids exhibiting complex molecular structure or interactions solidify by glass-formation rather than crystallization. This tendency is especially prevalent in polymeric and biological systems where glass-formation is normal rather than exceptional. Glass-formation involves a continuous 14 order of magnitude viscosity increase upon cooling, while crystallization is accompanied by an abrupt juimp to infinite values.The mechanical and transport properties of glasses are largely dictated by thr rate at which the viscosity changes with temperature ('fargility'), and an elucidation of the molecular and thermodynamic factors that influence fragility is crucial for engineering the properties of polymer materials and for designing processes for preserving biological materials.The present paper develops a systematic desription of fragility for general classes of polymer fluids based on direct lattice model computations of the configurational entropy S in combination with the Adam-Gibbs theory of structural relaxation.Citation
Journal of Physical Chemistry B
Volume
109
Pub Type
Journals
Download Paper
Keywords
configurational enthropy, fragility, glass-formation, monomer structure, pressure-induced glass-formation
Citation
Issues
If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.
Created October 3, 2005, Updated October 12, 2021