ACTIVATION OF FILLER SURFACE BY SPECIFIC ACID TREATMENT IN POLYPROPYLENE FILLER COMPOSITE

Improvement of mechanical properties of polypropylene(PP)/inorganic fi ller composite has been investigated. Ion bond type inorganic fillers such as calcium carbonate and potassium titanate showed highly improve d flexural modulus and moderate impact strength with specific acids tr eatment. DSC measurement and TEM observation proved that this phenomen a could be explained in terms of nucleation effect of the inorganic fi ller surface. Model experiments indicated that the nucleation occurred at the metal salt derived from an inorganic filler and an acid.