Research On Solid-phase Grafting Modification Of Pp With Binary-monomer

The binary monomer grafting technology by solid-grafting method of PP was researched in this research. By studying reaction temperature, time, initiator, polypropylene particle size, monomer ratio and the amount of grafting monomer to measure grafting rate of product under the different conditions and identify the main factors of impaction of graft, the last optimizing graft process. The structure and thermal property of grafted polymers were characterized through FTIR, DSC, contact-angle and melting flow rate (MFR).The results show that:The optimum single monomer grafting condition is that, PP 10.00g, monomer 0.70g and initiator 0.03g, interfacial agent xylene 1mL, dispersant agent ether 1mL, reaction 2h at 85℃(initiator 1) and 100℃(initiator 2).The optimum binary monomer grafting condition is that, PP 10.00g, monomer 0.60g and initiator 0.03g, WEA:WMAH=7:3 of binary-monomer, interfacial agent xylene 1mL, dispersant agent ether 1mL, reaction 2h at 85℃(initiator 1).Characterization test results of grafted products indicate that the monomer were indeed grafted onto PP chains. Its thermal properties had been improved obviously. Its contact-angle was lower than pure PP ,which proved that hydrophilicity had been significantly improved. And the grafting products remain its versatile physical properties.