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

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