Synthesis and Characteristics MAH-g-EPDM Compatibilized EPDM/NBR Rubber Blends.

Maleated ethylene-propylene diene monomer rubber (MAI-I-g-EPDM) was prepared on a two-roll mill and tested as a compatibilizer for EPDM/ NBR (butadiene-acrylonitrile rubber) blend. Intrinsic viscosity measurements and scanning electron microscopy revealed that MAH-g-EPDM improved the compatibility and morphology of EPDM/NBR blend. The uncompatibilized blend showed a negative deviation in the mechanical properties after aging, from the straight line of the additive rule. However, the compatibilized blend showed a positive deviation. Also, MAH-g-EPDM improved the co-curing of EPDM and NBR rubbers. The effect of blend ratio on the heat resistance and upon the stability against UV of the elastomer blend is discussed in terms of the mechanical properties. [ABSTRACT FROM AUTHOR]