朱志国,董振峰,黄秀琴,王锐,张大省
ZHU Zhi-guo,DONG Zhen-feng,HUANG Xiu-qin,WANG Rui,ZHANG Da-sheng(Department of Materials Science & Engineering

• 1:北京服装学院材料科学与工程学院
• 2:服装材料研究开发与评价北京市重点实验室

摘要(Abstract)：

采用原位复合方法,合成了不同多壁碳纳米管(MWNTs)含量的PET纳米复合物。实验中采用超声波辅助(方法A)和球磨辅助(方法B)两种分散方法。用扫描电子显微镜(SEM)、差示扫描量热分析(DSC)、Instron拉伸实验等手段对MWNTs及其在PET基质中的形态、复合物的熔融和结晶行为以及物理机械性能进行了表征。结果表明:MWNTs能够均匀分散于PET中,且长径比较小的MWNTs的分散程度更好一些。聚合物熔体结晶过程中,MWNTs具有明显的成核作用,最大可使熔融结晶温度提高24.1℃。与纯PET材料相比,含0.4%MWNTs的PET复合材料(A-PET-4)的拉伸强度和杨氏模量分别提高约17%和25%,断裂伸长率则大幅度降低。
Multi-walled carbon nanotubes/poly(ethylene terephthalate)(MWNTs/PET) with different MWNTs loadings had been prepared via in situ polymerization of ethylene glycol containing dispersed MWNTs and terephthalic acid.Ultrasonication-assited dispersion method(A) and ball-milling-assited dispersion method(B) were adopted to disperse MWNTs in EG,then in resultant PET.Scanning electronic microscopy(SEM),differential scanning calorimetry(DSC) and Instron tensile testing were utilized to characterize the morphol-ogy,crystallization and mechanical properties respectively.Good dispersion of MWNTs in PET nanocom-posites was achieved,especially by using method B.The incorporation of MWNTs accelerated the crystal-lization process obviously,the melt crystallizes temperature increased up to 24.1 ℃.Compared to neat PET,the elastic modulus(Young's modulus) and the yield strength of the PET nanocomposites were im-proved by about 25 % and 17 % respectively,with incorporating only 0.4 % MWNTs in method A.

关键词(KeyWords)： 聚对苯二甲酸乙二酯;多壁碳纳米管;分散;结晶性能;力学性能
poly(ethylene terephthalte),multi-walled carbon nanotubes,dispersion,crystallization behavior,mechanical property

Abstract:

Keywords:

基金项目(Foundation): 北京市服装材料研究开发与评价重点实验室开放课题(2007ZK-04)资助项目。

作者(Author): 朱志国,董振峰,黄秀琴,王锐,张大省
ZHU Zhi-guo,DONG Zhen-feng,HUANG Xiu-qin,WANG Rui,ZHANG Da-sheng(Department of Materials Science & Engineering

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