用原位聚合的方法制备了聚对苯二甲酸乙二醇酯(PET),带羧基的多壁碳纳米管/PET(MWNTs-COOH/PET)纳米复合材料和带羟基的多壁碳纳米管/PET(MWNTs-OH/PET)纳米复合材料.用热重分析(TG)仪测试了三种样品的热降解稳定性,用Friedman法和Ozawo法对测试结果进行了热降解动力学分析.结果表明,通过加入MWNTs,两种MWNTs/PET纳米复合材料的热稳定性都有不同程度的提高.MWNTs-COOH/PET的稳定性从开始降解到结束都比纯PET高,MWNTs-OH/PET开始降解阶段的稳定性不如纯PET,而在降解后期稳定性明显比纯PET高.
Pure poly(ethylene terephthalate)(PET), MWNTs-COOH/PET nanocomposites and MWNTs-OH/PET nanocomposites were synthesized via the in-situ method. The thermal degradation behaviors of PET, MWNTs-COOH/PET and MWNTs-OH/PET were examined by TG thermal analyzer. The thermal degradation kinetics were analyzed by Friedman method and Ozawo method. The results show that the thermal stability of the two types of MWNTs/PET nanocomposites are both improved. The thermal stability of MWNTs-COOH PET nanocomposite is better than pure PET through all the process of the degradation. The thermal stability of MWNTs-OH PET nanocomposite is worse than pure PET at initial stage of the degradation, but better at late stage.
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