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Model studies on the cure of a polyurethane elastomer—Kinetics and physical properties

✍ Scribed by Kerr H. Matthews; Richard A. Pethrick

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
478 KB
Volume
27
Category
Article
ISSN
0014-3057

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✦ Synopsis

The effect of solvent on the reactivity of a polyisocyanate (Desmodur L75) is reported. It is found that this molecule in certain solvent mixtures is less reactive than predicted and the possibility of solvent sheath effects reducing the "effective" reactivity is discussed. The implications of these effects on the cure of films formed from the reaction of the polyisoeyanate with a hydroxy-terminated polyester are examined in the context of observed changes in the dynamic mechanical properties.

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