Volume‐dependent rate processes in an epoxy resin
作者:
Craig A. Bero,
Donald J. Plazek,
期刊:
Journal of Polymer Science Part B: Polymer Physics
(WILEY Available online 1991)
卷期:
Volume 29,
issue 1
页码: 39-47
ISSN:0887-6266
年代: 1991
DOI:10.1002/polb.1991.090290106
出版商: John Wiley&Sons, Inc.
数据来源: WILEY
摘要:
AbstractResults for four different volume‐dependent rate processes of an epoxy resin, Epon 1001F, fully cured with a stoichiometric amount of 4,4′‐diamino diphenyl sulfone are presented: (1) specific volume measurements at constant rates of cooling; (2) time‐dependent volume measurements after rapid temperature changes; (3) elongational creep compliance measurements; and (4) shear creep compliance measurements. Voluminal and shear retardation spectra are compared as are the temperature time scale shift factors,aTobtained from the four processes. Volume–temperature cooling curves show the decreasing glass temperature with decreasing rate of cooling, but appear to reach the glass line at a constant temperature regardless of the rate of cooling. This narrowing of the “transition range” is not predicted by the Kovacs, Aklonis, Hutchinson, and Ramos (KAHR) multiparameter model, which assumes thermorheologic
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