Styrene (St) was dispersed into PP by means of ultrasonic wave,and due to the swelling and seepage of St to PP,St was grafted onto PP by the initiation of BPO.

• 利用超声波把苯乙烯（St）分散到聚丙烯（PP）中，利用苯乙烯对聚丙烯的溶胀渗透，在过氧化苯甲酰（BPO）的引发下发生接枝反应。