The non-isothermal cyclization kinetics of amino-functionalized carbon nanotubes/polyacrylonitrile composites by in situ polymerization

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• 作者：Ling Quan (1)
  Hailong Zhang (2) (3)
  Lianghua Xu (3)
  
  1. School of Electric Power ; North China University of Water Resources and Electric Power ; Zhengzhou ; 450045 ; China
  2. School of Civil Engineering and Communication ; North China University of Water Resources and Electric Power ; Zhengzhou ; 450045 ; China
  3. Key Laboratory of Carbon Fiber and Functional Polymers ; Ministry of Education ; Beijing University of Chemical Technology ; Beijing ; 100029 ; China
  
• 关键词：Polyacrylonitrile ; Amino ; functionalized carbon nanotube ; Composites ; Non ; isothermal cyclization kinetics ; In situ polymerization
• 刊名：Journal of Thermal Analysis and Calorimetry
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：119
• 期：2
• 页码：1081-1089
• 全文大小：1,266 KB
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• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Sciences
  Polymer Sciences
  Physical Chemistry
  Inorganic Chemistry
  Measurement Science and Instrumentation
  
• 出版者：Akad茅miai Kiad贸, co-published with Springer Science+Business Media B.V., Formerly Kluwer Academic
• ISSN：1572-8943

文摘

The non-isothermal cyclization kinetics of amino-functionalized carbon nanotubes (amino-CNTs)/polyacrylonitrile (PAN) composites was investigated using differential scanning calorimetry (DSC) in nitrogen atmosphere. The amino-CNTs/PAN composites were prepared by in situ polymerization under ultrasonication. The X-ray diffraction analysis showed that the composites had lower degree of crystallization compared with the neat PAN homopolymer. The morphology of composites suggested that the amino-CNTs had homogeneous dispersion in the PAN matrix. The Kissinger method and Crane method were used for describing the non-isothermal cyclization reaction of the neat PAN homopolymer and the amino-CNTs/PAN composites using DSC data with different heating rates. The results showed that the addition of amino-CNTs into the neat PAN homopolymer decreased the initial temperature and the peak temperature for the cyclization reaction. The amino-CNTs/PAN composites had higher activation energy than the neat PAN homopolymer, indicating that the presence of the amino-CNTs hindered the mobility of the PAN chain segments. The n-th order for the amino-CNTs/PAN composites is more close to one than that of the neat PAN homopolymer.