The polyethylene terephthalate/carbon nanotube (PET/CNT) nanocomposites were prepared by melt mixing using a twin screw extruder. CNT content was varied up to 5 wt. %. Morphology as well as dynamic mechanical, calorimetric, and rheological properties of the PET/CNT nanocomposites was investigated. Morphological studies indicated that CNT bundles are regularly distributed within the polymer matrix creating a connected network structure which significantly affects the nanocomposite properties. Dynamic mechanical thermal analysis revealed increase in storage and loss modules of the investigated PET nanocomposites by increasing the content of CNTs. Differential scanning calorimetry results demonstrated increase in crystallinity of the investigated PET nanocomposites upon addition of the nanofiller. Rheological studies demonstrated that CNT addition up to 5 wt. % caused increment in complex viscosity and storage modulus. Rheological percolation threshold was observed to be 0.83 wt. % of CNT concentration, respectively.

中文翻译：

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熔融加工制备聚对苯二甲酸乙二酯/碳纳米管纳米复合材料的动态力学，介电和流变分析

通过使用双螺杆挤出机熔融混合来制备聚对苯二甲酸乙二酯/碳纳米管（PET / CNT）纳米复合材料。CNT含量变化至5重量％。％。研究了PET / CNT纳米复合材料的形貌以及动态力学，量热和流变性质。形态学研究表明，CNT束有规律地分布在聚合物基质中，形成了一个连接网络结构，该结构显着影响了纳米复合材料的性能。动态机械热分析表明，通过增加CNT的含量，所研究的PET纳米复合材料的存储和损失模数增加。差示扫描量热法结果表明，添加纳米填料后，所研究的PET纳米复合材料的结晶度增加。流变学研究表明，CNT的添加量最高为5重量％。％引起复数粘度和储能模量的增加。观察到流变渗透阈值为0.83重量％。分别为CNT浓度的％。