MORPHOLOGICAL, THERMAL AND RHEOLOGICAL PROPERTIES OF THE BLENDS POLYPROPYLENE NYLON-6, POLYPROPYLENE NYLON-6 (MALEIC ANHYDRIDE-G-POLYPROPYLENE) AND (MALEIC ANHYDRIDE-G-POLYPROPYLENE) NYLON-6

Melt blends of polypropylene(PP)/nylon-6, PP/nylon-6/(maleic anhydride-g-polypropylene-(MAH-g-PP)) and (MAH-g-PP)/nylon-6 have been prepared using a Brabender plasticoder. Measured properties included steady shear viscosities from a capillary rheometer, thermal properties from DSC, and morphologies from SEM. The viscosity-composition curve, measured at low rate of shear, indicated negative deviation from the simple additive rule for PP/nylon-6 blends, positive deviation for PP/nylon-6/MAH-g-PP blends and positive and negative deviations for MAH-g-PP/nylon-6 blends. The results have been interpreted in terms of morphological texture of the blends and chemical reactions between the constituent polymers. © 1990.