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A kinetic study of thermal degradations of chitosan/polycaprolactam blends

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Abstract

We have used FT-IR spectra to explain the effects of hydrogen bonding between chitosan and polycaprolactam (PA6). A dynamic mechanical analysis study suggested that the optimum chitosan and PA6 miscibility under the conditions of this experiment were obtained at a blending ratio of 40∶60. We studied the thermal degradation of chitosan blended with PA6 (chitosan/PA6) by thermogravimetric analysis and kinetic analysis (by the Ozawa method). Dry chitosan and PA6 exhibited a single stage of thermal degradation and chitosan/PA6 blends having > 20 wt% PA6 exhibited at least two stages of degradation. In chitosan/PA6 blends, chitosan underwent the first stage of thermal degradation; the second stage proceeded at a temperature lower than that of PA6, because the decomposition product of chitosan accelerated the degradation of PA6. The activation energies of the blends were between 130 and 165 kJ/mol, which are also lower than that of PA6.

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Authors and Affiliations

  1. Department of Fiber and Composite Materials, Feng Chia University, Taichung, Taiwan

    Shen-Kun Liao & Chi-Chih Hung

  2. Department of Business & Administration Management, Transworld Institute of Technology, Yunlin, Taiwan

    Ming-Fung Lin

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  1. Shen-Kun Liao
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  2. Chi-Chih Hung
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Liao, SK., Hung, CC. & Lin, MF. A kinetic study of thermal degradations of chitosan/polycaprolactam blends. Macromol. Res. 12, 466–473 (2004). https://doi.org/10.1007/BF03218428

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  • DOI: https://doi.org/10.1007/BF03218428

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