Blends of polypropylene (PP) and acrylonitrile rubber (NBR) were prepared i
n a Haake 9000 Rheocord System. Two different phenolic resins were introduc
ed into these blends and the effect of this third component on the mechanic
al properties was evaluated, as well as the relationship between the crysta
llization of the polypropylene matrix and the properties analysed.