Phase structure of ternary polypropylene/elastomer/filler composites: effect of elastomer polarity

Phase structure of ternary polypropylene/elastomer/calcium carbonate composites has been investigated using scanning electron microscopy, dynamic mechanical analysis and differential scanning calorimetry. Two kinds of phase structure were observed either a separate dispersion of the phases or encapsulation of the filler by elastomer. The composite phase structure was determined mainly by the chemical character of the components and, to a lesser...