STUDIES ON THE POLYMERS FILLED WITH PARTICLES .2. POLYPROPYLENE FILLED WITH CALCIUM-CARBONATE AND TREATED WITH POLY(ETHYLENE GLYCOL) DERIVATIVES

Polypropylene (PP) samples filled with calcium carbonate (CaCO//3), which have been treated with poly-(ethylene glycol) derivatives (PEG), were prepared. The relationships between tensile ultimate elongation, visco-elastic property(loss tangent), void volume of PP/CaCO//3 surface of the composites and the repeating unit of PEG have been investigated. Maximum tensile elongation and loss tangent of primary dispersion peak left brace (tan delta ) max) increased with the increase of repeating unit, but void volume decreased with it. The effect of particle size on (tan delta ) max makes the value smaller for CaCO//3 (mean size 1. 0 mu m) than for CaCO//3 (4. 5).