PBT/改性坡缕石纳米复合材料的结构和微观力学性能

Microstructure and Micro-Mechanial Properties of PBT/Modified AT Nanocomposites

采用熔融共混法制备了PAS改性AT/PBT纳米复合材料。结果表明:PBT/AT复合材料中的AT在低含量时可以达到纳米级的良好分散,而高含量时出现AT的团聚体;与PBT复合后,AT的典型衍射峰未变化,且AT对基体PBT的晶型也几乎没有影响。AT的加入对PBT的热分解过程影响不大。微观力学结果表明:作为纳米级填料的AT在含量较低时可以对复合材料的黏度和蠕变性能产生明显影响,而随着AT含量的进一步增加,由于AT本身的团聚,其影响作用减弱。AT作为纳米级填料的纳米效应是其使PBT微观力学性能改变的机理。

Modified AT/PBT PNC were prepared by melt compounding. The results showed that a nanoscale dispersion of AT throughout the PBT matrix for lower AT content was achieved,however,aggregates of AT appeared for the composites with higher AT content. After compounded with PBT,the typical diffraction peaks of AT had no change. And the addition of AT had no effect on crystal type of PBT. The addition of AT into PBT matrix had almost no influence on thermal decomposition of PBT. As a nanoseale filler, the AT with lower content caused significant effects on viscosity and creep of the composites,and for the composites with higher AT content the actions weakened. The mechanism of AT reinforcing polymer matrix was its nanoscale effects.