Cryogenic Properties of a Polyurethane Adhesive*
作者:
R.F. Robbins,
期刊:
Journal of Macromolecular Science: Part A - Chemistry
(Taylor Available online 1969)
卷期:
Volume 3,
issue 7
页码: 1367-1380
ISSN:0022-233X
年代: 1969
DOI:10.1080/10601326908051831
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Differential thermal analysis (DTA), rebound resilience, and tensile proerties of a polyurethane adhesive were measured at cryogenic temperatures. The experimental methods are described, and test results which aid in evaluating the polyurethane for use at low temperatures are discussed. The DTA thermogram reveals that the glass transition temperature (Tg) is 235°K. The resilience profile indicates a resilience minimum (Tr) at 270°K and a frequency of 3800 Hz, which is consistent with the Tgmeasured by DTA. The low resilience below Tr, caused by secondary low-temperature transitions, shows the high energy absorption capabilities of the polyurethane. Considerable plastic flow at 195°K (40°K below Tg) is evidenced in the results of the tensile tests. The results of the three tests indicate that the polyurethane adhesive will perform well at low temperatures. The test methods should also be useful for evaluating the low-temperature performance of new polymers.
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