A series of nanocomposites containing multi-walled carbon nanotubes (MWNTs) and terephthaloyl-di-p-oxybenzoyl chloride-triethylene glycol copolyester (T–T) were prepared by in-situ hightemperature solution polycondensation. The liquid crystalline properties and thermal stability of the resulted MWNTs/T–T nanocomposites were investigated by wide-angle X-ray diffraction (WAXD), polarized optical microscopy (POM), differential scanning calorimetry (DSC), and thermogravimetric analyzer (TGA), respectively. The results showed that MWNT doping at a low concentration improved the thermal stability of T–T matrix and expanded the nematic temperature range without largely changing its conformation, making it more suitable for processing. The dispersion of MWNTs and interfacial interactions between the thermotropic liquid crystalline polymer (TLCP) molecules and the carbon nanotubes (CNTs) were investigated by scanning electron microscopy (SEM) and optical spectroscopies. The UV-vis spectroscopy and fluorescence spectra supported a strong π–π* interaction between the polymer and the nanotube.
通过原位高温溶液缩聚法制备了一系列含有多壁碳纳米管(MWNTs)和对苯二甲酰基二对氧
苯甲酰氯-
三乙二醇共聚聚酯(T-T)的纳米复合材料。分别采用广角 X 射线衍射仪(WAXD)、偏振光学显微镜(POM)、差示扫描量热仪(
DSC)和热重分析仪(TGA)对所制备的 MWNTs/T-T 纳米复合材料的液晶性质和热稳定性进行了研究。结果表明,低浓度掺杂的 MWNT 提高了 T-T 基体的热稳定性,并扩大了向列温度范围,而不会在很大程度上改变其构象,使其更适合加工。扫描电子显微镜(
SEM)和光学光谱研究了 MWNTs 的分散情况以及热致性液晶聚合物(TLCP)分子与碳纳米管(CNTs)之间的界面相互作用。紫外-可见光谱和荧光光谱证明聚合物与纳米管之间存在强烈的π-π*相互作用。