Studies on the technique and mechanism of solid grafting polypropylene with dual monomers

Solid grafting is a promising grafting method, which is simple, cheap and e asy to control, to get a polar polypropylene (PP). However, the achieved pr oduct may have a severe degradation and the graft ratio cannot satisfy us. In this paper, dual monomers, maleic anhydride(MAH) and tri-allyl isocyanur ate(TAIC) were used to graft onto PP. It was found that TAIC was efficient to enhance the MAH content of the products and prohibit PP's degradation. T he MAH content of the product can reach 7.2% with 4%TAIC. This is prominent when it was compared with melt grafting product and normal solid grafting product. The MAH content and the melt flow rate(MFR) of the product can be adjusted by changing TAIC's amount. The reaction mechanism of dual monomers in the grafting polymerization and their composition in the product were a lso discussed.