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Effect of multi-walled carbon nanotubes on the physical properties and crystallisation of recycled PET/TPU composites

机译：多壁碳纳米管对再生PET / TPU复合材料物理性质和结晶的影响

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摘要

Thermoplastic polyurethane (TPU) was blended with recycled polyethylene terephthalate (rPET) to prepare rPET/thermoplastic polyurethane (TPU) composites. Meanwhile, multiple-walled carbon nanotubes (MWCNTs) were employed as a reinforcing filler to study the synergistic effect between CNTs and rPET/TPU composites. The effect of CNT content on the morphology and micro-structure of the composites was investigated using a scanning electron microscope (SEM) and X-ray diffraction (XRD). The thermal properties were characterized using differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and dynamic mechanical analysis (DMA). The mechanical properties were investigated using tensile tests and hardness measurements. The results showed that TPU was compatible with rPET. The existence of rPET changed the crystalline phase and affected the glass transition and crystallisation temperature of the TPU matrix. The rPET/TPU composites displayed poor thermal stability and tensile properties when compared to pure TPU. The addition of CNTs had no effect on the crystalline phase of the rPET/TPU composites. Due to the occurrence of interfacial adhesion between the CNTs and rPET, the CNTs displayed an offset effect on the reaction of rPET and decreased the rigidity of the molecular chain in the rPET/TPU composites. The thermal stability and tensile strength of the CNTs/rPET/TPU composites improved with an increase in CNT content.
机译：将热塑性聚氨酯（TPU）与再循环的聚对苯二甲酸乙二醇酯（RPET）混合以制备RPET /热塑性聚氨酯（TPU）复合材料。同时，使用多壁碳纳米管（MWCNT）作为增强填料，以研究CNT和RPET / TPU复合材料之间的协同效应。使用扫描电子显微镜（SEM）和X射线衍射（XRD）研究CNT含量对复合材料的形态和微结构的影响。使用差示扫描量热法（DSC），热重分析（TGA）和动态机械分析（DMA）表征热性能。使用拉伸试验和硬度测量来研究机械性能。结果表明，TPU与RPET兼容。 RPET的存在改变了结晶相并影响了TPU基质的玻璃化转变和结晶温度。与纯TPU相比，RPET / TPU复合材料显示出差的热稳定性和拉伸性能。 CNT的添加对RPET / TPU复合材料的晶相没有影响。由于CNT和RPET之间的界面粘附的发生，CNT对RPET的反应显示偏移效果并降低了RPET / TPU复合材料中分子链的刚性。 CNT / RPET / TPU复合材料的热稳定性和拉伸强度随着CNT含量的增加而改善。

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  • 来源
    《RSC Advances》 |2018年第16期|共9页
  • 作者

    Fang Changqing; Yang Rong; Zhang Zisen; Zhou Xing; Lei Wanqing; Cheng Youliang; Zhang Wei; Wang Dong;

  • 作者单位

    Xian Univ Technol Fac Printing Packing Engn &

    Digital Media Technol Xian 710048 Shaanxi Peoples R China;

    Xian Univ Technol Fac Printing Packing Engn &

    Digital Media Technol Xian 710048 Shaanxi Peoples R China;

    Xian Univ Technol Fac Printing Packing Engn &

    Digital Media Technol Xian 710048 Shaanxi Peoples R China;

    Xian Univ Technol Fac Printing Packing Engn &

    Digital Media Technol Xian 710048 Shaanxi Peoples R China;

    Xian Univ Technol Fac Printing Packing Engn &

    Digital Media Technol Xian 710048 Shaanxi Peoples R China;

    Xian Univ Technol Fac Printing Packing Engn &

    Digital Media Technol Xian 710048 Shaanxi Peoples R China;

    Xian Univ Technol Fac Printing Packing Engn &

    Digital Media Technol Xian 710048 Shaanxi Peoples R China;

    Xian Univ Technol Fac Printing Packing Engn &

    Digital Media Technol Xian 710048 Shaanxi Peoples R China;

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