应用双螺杆挤出机熔融插层制备出PP/蒙脱土纳米复合材料,X射线衍射表明,PP高分子链已插层进入有机蒙脱土片层之间.应用两种不同缝隙厚度的窄缝流变仪对PP及PP/蒙脱土纳米复合材料的剪切粘度及影响因素进行了研究.结果表明,PP/蒙脱土纳米复合材料为剪切变稀性流体.在190 ℃和210 ℃温度下,PP/蒙脱土纳米复合材料呈现类固体的非牛顿流体行为,剪切粘度随着剪切速率的升高逐渐降低.在230 ℃和剪切速率小于80 s-1的情况下,PP/蒙脱土纳米复合材料呈现类牛顿性流体行为.温度较高时,蒙脱土的含量对复合材料的剪切粘度的影响较为明显.
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