Abstract
Relation between impact properties and filler diameter of polypropylene(PP)/elastomer/filler ternary composite was investigated. Calcium carbonate(CaCO3) particles with a diameter in the range from 120 to 1200 nm were used as filler and polystyrene-block-poly(ethylene-butene)-block-polystyrene triblock copolymer(SEBS) was used as elastomer. In the PP/SEBS/CaCO3 ternary composite, CaCO3 particles and SEBS particles were dispersed in the PP matrix separately. When SEBS volume fraction is below 0.12, the impact strength increased gradually with the decrease of the CaCO3 particle size. When SEBS volume fraction is above 0.17, the addition of CaCO3 particles with a diameter in the range from 120 to 900 nm was more effective than the addition of those of 1200 nm to improve the impact strength.
