PP/纳米CaCO_3原位复合材料流变性能

Rheological behavior of PP/nano-CaCO_3 in-situ nanocomposite

利用毛细管流变仪研究了聚丙烯(PP)/纳米CaCO3原位复合材料的流变行为。结果表明,复合材料的表观粘度随剪切速率的增大而降低,但表观粘度对温度的变化不敏感;当纳米CaCO3质量分数在3%以上时,随纳米含量的增加,表观粘度明显降低,纳米CaCO3质量分数为3%左右时,原位复合材料的流动活化能较高,对温度的敏感性也相对较高。

The rheological behavior of PP/ nano-CaCO_3 (in-)situ nanocomposite was investigated using capillarity rheometer. The result showed that the apparent viscosity of the composite decreased with the increase of the shear rate, but it was not sensitive to temperature. When the mass fraction of nano-CaCO_3 was above 3%,the apparent viscosity of the composite decreased obviously with the increase of nano-(CaCO_3). The flow activiation energies was higher when the mass fraction of nano-CaCO_3 was about 3%,and the sensitivity of the shear rate to temperature was also higher.