Compatibility of natural rubber (NR)/low density polyethylene blends was calculated and it was predicted that compatibility existed between the amorphous part of polyethylene and NR. Based on above calculation and prediction

an interaction model of polyethylene and NR was suggested. Effective network chain density measurement

dynamic mechanical spectrum measurement

wide angle X-ray diffraction and density measurement have been used to verify the compatibility of natural rubber/low density polyethylene blends (NR either unvulcanized or vul-canized) as predicted by the calculation and proposed model. Experimental results show that there exist certain interaction between amorphous LDPE and NR.