The mechanical properties,rheological properties and thermal properties of high density polyethylene (HDPE)/ethy1 ene propyl ene diene monomer(EPDM)/polypropylene(PP)blends were studied,and the microstructure of TPV was investigated by scanning electron microscope(SEM).Experimental results show that with the increase of HDPE,the tensile strength,tear strength and the shore A hardness of TPV decrease,that the maximum torque increases to the maximum before it gradually becomes stable during the rheologcal test,and that the thermo-gravimentric temperature and the decomposition temperature hardly change,compared with the TPV without HDPESEM analysis shows that the structure of HDPE shel1.core wrapped by EPDM increases with the increase of HDPE.
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