Grafting PP by Swelling Suspension Copolymerization Process

Grafting polypropylene by the suspension process has been polymerized in water medium using BPO as initiator. The effects of the recipes and reaction conditions on grafting rate and grafting efficiency of PP have been investigated. The results show that the swelling time, initiator, catalyst and suspension agents are main affecting factovs effects the grafting process. The advantages of the grafting method are that the process is simple and the product has higher grafting rate and less decomposition. Using the grafting PP resin as a compatible agent of these composites of PP/CaCO 3, PP/PA6,PP/MBS, the mechanical properties of the blending materials have been significantly improved.