Elastomeric Blends of Polyurethane and Polychloroprene Elastomers (Sulfur Cure) with Reference to the Interchain Crosslinking Reaction

摘要

Polyblends of polyurethane elastomers and polychloroprene rubbers, prepared by three different blending techniques, have been studied in different blend reatios. Blend properteis largely depend on the blending ratio. The blending technique also has a significant roel towards the properties of the blends. IR spectra reveals that interchain crosslinking occurs between the two elastomeric phases on heat treatment. Prheating retards the degradations of the blends at high temperature. The extractability of the single phase by solvent also was restricted on preheating the preblends.