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Study of natural weathering of polyurethane rigid foam by photoacoustic spectroscopy

✍ Scribed by M.E. Abu-Zeid; M.A. Marafi; E.E. Nofal; A.A. Anani

Publisher
Elsevier Science
Year
1982
Weight
413 KB
Volume
18
Category
Article
ISSN
0047-2670

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Dynamic viscoelastic properties of the rigid polyurethane foam, which is used in Japan as a thermal insulator for refrigerators were studied during the curing process using the RDS-7700 Dynamic Spectrometer. The curing process, in which large volume expansion and heat evolution occurred, was easily