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

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Abstract

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.

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Acknowledgements

This work was supported by National Basic Research Program of China (2011CB605602) and the Foundation of He’nan Educational Committee (13A430716).

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Authors and Affiliations

  1. School of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou, 450045, China

    Ling Quan

  2. School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou, 450045, China

    Hailong Zhang

  3. Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Bei**g University of Chemical Technology, Bei**g, 100029, China

    Hailong Zhang & Lianghua Xu

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  1. Ling Quan
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Correspondence to Hailong Zhang.

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Quan, L., Zhang, H. & Xu, L. The non-isothermal cyclization kinetics of amino-functionalized carbon nanotubes/polyacrylonitrile composites by in situ polymerization. J Therm Anal Calorim 119, 1081–1089 (2015). https://doi.org/10.1007/s10973-014-4241-1

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  • DOI: https://doi.org/10.1007/s10973-014-4241-1

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