Grafting acrylic acid onto polypropylene by reactive extrusion with pre-irradiated PP as initiator

摘要

In this paper,the modification of polypropylene(PP)with acrylic acid(AA)by reactive extrusion using pre-irradiated PP(rPP)as initiator was investigated.It was found the relatively high graft degree(Gd)and slight degradation of modified PP was obtained when 20 wt% rPP was used.This result can be explained in terms of effective concentration of free radicals.Compared with the neat PP,the modified PP showed the high-notched impact strength and improved adhesion of PP to polar substrate.This technique is of potential industrial interest for PP modification.