Toughening and reinforcing polypropylene with core-shell structured fillers

An elastomer/rigid particle filler with core-shell structure was prepared b y twin-screw extruder according to an encapulation model. It was used to to ughen and reinforce polypropylene (PP). An original idea of a one-step proc essing method was adopted in creating PP/polyoctene- ethylene/talc ternary composites. The rheological behavior of PP was changed and the mechanical p roperties were improved. SEM observation showed that the core-shell structu red filler dispersed better in copolypropylene than in homopolypropylene. T wo reasons were proposed and proved by the rheology test and SEM observatio n. (C) 1999 John Wiley & Sons, Inc.