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Effects of Glycerol on Melt Spinning of Polyacrylonitrile Copolymer and Tetrapolymer

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Abstract

Comonomers vinylimidazole, methyl acrylate, and acrylic acid were added to acrylonitrile to synthesize two polymers, poly(acrylonitrile-co-1-vinylimidazole) and poly(acrylonitrile-co-N-vinylimidazole-co-methyl acrylate-co-acrylic acid), with the goal of enhancing their melt processability for their use as carbon fibers. The two polymers were melt-extruded, but the as-spun filaments were brittle. Therefore, glycerol was mixed with the polymers to improve their spinnability and drawability. The addition of glycerol to the polyacrylonitrile copolymer and tetrapolymer reduced their melt viscosity, enhanced their melt spinnability, and improved their drawability. When 15 % (w/w) glycerol was added, the melt viscosity of the two polymers was reduced to below 1000 Pa·s at a shear rate of 100 s-1, and the tensile strength of the resulting filaments was high enough for them to be used as precursor filaments for carbon fibers. Furthermore, a draw ratio of over 5.5 was achieved for the melt spun filaments of mixtures of the copolymer and tetrapolymer with 15 % glycerol (w/w) at a temperature of 150 °C.

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Acknowledgements

This research of Korean-German Academia-Industry International Collaboration Program was supported by the Korean Ministry of Trade, Industry and Energy (Project number: N06000017).

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Authors and Affiliations

  1. Department of Advanced Organic Materials Engineering, Yeungnam University, Gyeongsan, 38541, Korea

    Yeong Min Im, Hye Mi Choi, A. Joseph Nathanael & Tae Hwan Oh

  2. Core-Material Research Division, Korea Institute of Carbon Convergence Technology, Jeonju, 54853, Korea

    Min Hye Jeong

  3. Department of Organic Materials & Fiber Engineering, Chonbuk National University, Jeonju, 54896, Korea

    Min Hye Jeong

  4. Dongmyung Technologies, Changwon, 51614, Korea

    Seung O. Lee & Sung No Yun

Authors
  1. Yeong Min Im
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  2. Hye Mi Choi
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  3. A. Joseph Nathanael
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  4. Min Hye Jeong
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  5. Seung O. Lee
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  6. Sung No Yun
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  7. Tae Hwan Oh
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Correspondence to Tae Hwan Oh.

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Im, Y.M., Choi, H.M., Nathanael, A.J. et al. Effects of Glycerol on Melt Spinning of Polyacrylonitrile Copolymer and Tetrapolymer. Fibers Polym 21, 376–383 (2020). https://doi.org/10.1007/s12221-020-9412-z

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  • DOI: https://doi.org/10.1007/s12221-020-9412-z

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