POLYMER BLENDS OF POLYPROPYLENE WITH POLYDIALKYLSILOXANE

Polypropylene was blended with polydialkylsiloxane (alkyl : propyl and octyl). Some properties of the resultant polymer blends were investig ated: the melt flow index at 230 degrees C, bending modulus, and Izod impact strength. Furthermore, their morphology was observed using scan ning and transmission electron microscopes. It was elucidated that pol ydipropylsiloxane and polydioctylsiloxane, which are finely dispersed as ciliated islands in the sea of polypropylene, are effective to incr ease the melt flow index and Izod impact strength of the polymer blend s. (C) 1998 John Wiley & Sons, Inc.