期刊
JOURNAL OF ELASTOMERS AND PLASTICS
卷 42, 期 2, 页码 163-179出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/0095244310362732
关键词
cross-linker; chain extenders; polyurethane; water degradation; mechanical properties
Cross-linked polyurethanes (PUs) based on poly(1,4-butane diol), 4,4'-diphenylmethane diisocyanate, 1,6 hexamethylene diisocyanate with a varied content and nature of the hard segment and a constant soft segment length were hydrolytically degraded in distilled water at 37 degrees C. The incubation of polymer samples took place over a period of maximum 30 days. The changes in tensile strength and morphology of PU samples were tested after a particular period of incubation. Degradation was determined by FTIR-ATR and by analyzing mechanical properties. It is demonstrated that the degree of degradation of PUs in distilled water is dependent on the degree of cross-linking and nature of the diisocyanates and chain extenders.
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