Influence of compatibilizer on dynamic rheological behavior of PP/TPEE blends

POE-g-GMA,PP-g-GMA and EVA were used as the compatibilizers for PP/ TPEE blends whose dynamic rheological and phase behaviors were investigated by rotary rheometer.The experimental results showed that the complex viscosity,energy storage modulus and loss modulus of PP/TPEE/EVA blend were the lowest.Calculated from time-temperature superposition(TTS),the temperatures of phase separation for PP/TPEE,PP/TPEE/POE-g-GMA and PP/TPEE/PP-g-GMA were 220,230,240 and 250 ℃,respectively,and their applicable frequency range were above 1.32,0.15,1.12 and 2.82 Hz,respectively.The addition of EVA to the blends made the phase separation phenomena more obvious,while the addition of POE-g-GMA improved the compatibility of the blends.The results of cole-cole curves were in better agreement with those of TTS curves but more accurate.