To HDPE/LLDPE blends, there were better mechanical strengths and lower shrinkage, but there were the poor impact strength because of incompatibility between PP and PE.

• HDPE/PP共混物虽然力学强度较高、收缩率较小，但由于HDPE与PP不相容，共混物产生明显相分离现象，导致体系的韧性较差，难以满足应用要求。