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Mechanism and kinetics of stabilization reactions of poly(acrylonitrile-co-3-aminocarbonyl-3-butenoic acid methyl ester)

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Abstract

A bifunctional comonomer 3-aminocarbonyl-3-butenoic acid methyl ester (ABM) was designed and synthesized to prepare poly(acrylonitrile-co-3-aminocarbonyl-3-butenoic acid methyl ester) [P(AN-co-ABM)] copolymer which can be used as carbon fiber precursor instead of poly(acrylonitrile–acrylamide–methyl acrylate) [P(AN–AM–MA)] terpolymer. The stabilization mechanism and structural evolution of P(AN-co-ABM) and P(AN–AM–MA) during stabilization were studied by Fourier transform infrared spectroscopy, X-ray diffraction, differential scanning calorimetry, and thermogravimetry. The activation energy (E a) of the cyclization reactions was calculated by Kissinger method and Ozawa method. The results show that the stabilization of P(AN-co-ABM) has been remarkably improved by ABM compared with P(AN–AM–MA) terpolymer, such as lower initiation temperature, broadened exothermic peak, larger extent of stabilization, and smaller E a of cyclization, which is attributed to the initiation of ABM through ionic mechanism. Moreover, the spinnability of P(AN-co-ABM) is also improved by ABM due to the lubrication of ester groups in ABM. This study clearly shows that P(AN-co-ABM) copolymer is a better material used as carbon fiber precursor than P(AN–AM–MA) terpolymer.

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Acknowledgements

Financial support of this work from Important National Research Program “863” (number 2012AA030313-1) was gratefully acknowledged.

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Authors and Affiliations

  1. College of Textile & Clothing, Jiangnan University, Wuxi, 214122, China

    Anqi Ju, Kun Zhang & Mingqiao Ge

  2. School of Pharmacy, East China University of Science and Technology, Shanghai, 201620, China

    Miao Luo

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  1. Anqi Ju
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  2. Miao Luo
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  3. Kun Zhang
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Correspondence to Anqi Ju.

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Ju, A., Luo, M., Zhang, K. et al. Mechanism and kinetics of stabilization reactions of poly(acrylonitrile-co-3-aminocarbonyl-3-butenoic acid methyl ester). J Therm Anal Calorim 117, 205–215 (2014). https://doi.org/10.1007/s10973-014-3687-5

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