CO-VULCANIZED BLENDS OF EVA-EPDM

Covulcanized blends of EVA (28% VA) and EPDM (ENB) were prepared in di fferent proportion. The technical compatibility is achieved through co vulcanization of two polymers. Physico-mechanical, dynamic mechanical( DMA), thermal (DSC), electrical resistivity and morphological studies of these blends were made. Dynamic mechanical analysis show a single b road Gamma-transition temperature for each blend indicating partial mi scibility between the components in amorphous region. Morphological st udies show the presence of co-continuous structure in the blend at 50: 50 composition. Electrical resistivity of the blends can be correlated with morphology. The systems show tendency of post curing as observed from high temperature DMA study. Mechanical properties like tensile s trength increases with EVA content, whereas elongation at break decrea ses with EVA concentration up to 50 wt.%, and then attains plateau.