Aging of Polyurethane Foam Insulation in Simulated Refrigerator Panels–Three-Year Results with Third-Generation Blowing Agents

Laboratory data are presented on the effect of constant temperature aging on the apparent thermal conductivity of polyurethane foam insulation for refrigerators and freezers. The foam specimens were blown with HCFC-141b and with three of its potential replacements—HFC-134a, HFC-245fa, and cyclopenta...

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Bibliographic Details
Published in:Journal of cellular plastics 2002-07, Vol.38 (4), p.317-339
Main Authors: Wilkes, Kenneth E., Yarbrough, David W., Gabbard, W. A., Nelson, Gary E., Booth, J. Richard
Format: Article
Language:English
Subjects:
AGING
Applied sciences
Cellular
ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
Exact sciences and technology
Forms of application and semi-finished materials
FREEZERS
PLASTICS
Polymer industry, paints, wood
POLYURETHANES
REFRIGERATORS
Technology of polymers
THERMAL CONDUCTIVITY
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Summary:Laboratory data are presented on the effect of constant temperature aging on the apparent thermal conductivity of polyurethane foam insulation for refrigerators and freezers. The foam specimens were blown with HCFC-141b and with three of its potential replacements—HFC-134a, HFC-245fa, and cyclopentane. Specimens were aged at constant temperatures of 90 F, 40 F, and-10 F. Thermal conductivity measurements were made on two types of specimens: full-thickness simulated refrigerator panels containing foam enclosed between solid plastic sheets, and thin slices of core foam cut from similar panels. Results are presented for the first three years of a multi-year aging study. Preliminary comparisons of measured data with predictions of a mathematical aging model are presented.
ISSN:0021-955X
1530-7999
DOI:10.1177/0021955X02038004142