Study on Styrene and Maleic Anhydride Grafted Polypropylene in Water Suspension System

Styrene and maleic anhydride grafted polypropylene(PP-g-St/MAH) was prepared via a water suspension grafting process.The effect of St dosage on the grafting reaction was investigated using melt flow rate,water contact angle,X-ray diffraction,and Fourier transform infrared spectroscopy.It showed that the grafting ratio of MAH increased with increasing St dosage.When the weight ratio of St/MAH was 3/1,the grafting ratio was 3.10 % and grafting efficiency reached 70.02 %.With increasing grafting ratio,the melt flow rate decreased;melt strength increased;crystallinity lowered,and hydrophilicity enhanced.