Solution Grafting of Maleic Anhydride onto Polyethylene and Compatibilization of Polyetylene-Nylon Blends

摘要

Maleic anhydride (MAH) has been grafted onto high density polyethylene (HDPE) with benzoyl peroxide (BOP) initiator in toluene solution. Maximum degree of grafting (12%) without crosslinking has been obtained using MAH/HDPE and BOP/HDPE weight ratios of 1.0 and 0.15, respectively, at 110 deg C. The HDPE-g-MAH compatibilizer is found to drastically reduce t he dispersed phase size and also to produce homogeneous blends for relatively low concentrations of dispersed phase in HDPEylon blends. Addition of this compatibilizer results in increase of tensile strength and modulus with increasing nylon content of HDPEylon blends, while the opposite is found for the blends without any added compatibilizer