Thermorheological Properties of Thermoplastic Elastomeric Blends of NBR/SAN Containing Waste Nitrile Rubber Vulcanizate Powder

摘要

The present paper reports the results of studies on the thermorheological properties and extrudate characteris-tics of the 60/40,70/30 and 80/20 nitrile rubber(NBR)/poly(styrene-co-acryloni-trile)(SAN)blends.The effects of dy-namic vulcanization and replacement of a part of the virgin NBR by a nitrile rubber vulcanizate powder(w-NBR)on the 70/30 NBR/SAN blend were also investigated.The blends show pseu-doplastic behavior.Replacement of the rubber phase by w-NBR improves the die swell characteristics and surface finish of the extrudates of the ther-moplastic elastomeric blend.The blends are 'thermorheologically com-plex'.