Abstract
Abstract
Blends of polyurethane with chlorobutyl elastomer prepared by three different blending techniques have been studied in the entire composition range. The properties of the blends showed that the blending technique plays an important role in determining the blend properties. IR spectral analysis revealed that interchain crosslinking is possible in this blend system upon heat treatment. Thermal stability of blends prepared by preheating the preblend was increased and the degradation process was retarded. Extractability of the single phase, by solvent, was also limited significantly in the case of the preheated preblended sample, probably due to phase adhesion.
© 2001 Society of Chemical Industry