【摘要】 通过“熔融-热拉伸-淬冷”的方法制备得到PE-HD／PET原位微纤化共混物。研究了PE-HD／PET原位微纤化共混物的动态流变性能,着重分析了PET微纤相的不同含量引起的微纤的形态结构的变化对PE-HD／PET微纤化共混物动态流变性能的影响。实验表明,在测试的角速度范围(0．01-100 rad／s)内,共混物的复数黏度的对数和微纤含量呈线性关系;当微纤质量分数大于20％时,共混物在低频区域出现“末端区效应”,损耗模量～频率曲线和Han关系曲线在低频区偏离线性,这主要是由于微纤在基体中形成网络结构引起的。更多还原

【Abstract】 PE-HD/PET microfibrillar blends were fabricated via "extrusion-hot stretching-quenching" approach. The influence of microfibrillar phase concentration on dynamic rheological behaviors had been investigated. It was showed that the relationship between the logarithm of complex viscosities and the concentration of microfibrillar phase was linear in all test angular velocity region. When the concentration of microfibril was 20 wt % or higher, both G"-ε and Han’s relationship curves deviated from linearity in low angular velocity region (terminal region) mainly due to the formation of microfibril network.更多还原