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Exploring the effects of non-solvent concentration, jet-stretching and hot-drawing on microstructure formation of poly(acrylonitrile) fibers during wet-spinning

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Abstract

The simultaneous effects of non-solvent concentration in the spinning dope, jet-stretching and hot-drawing on porosity, morphology development and mechanical properties of wet-spun poly(acrylonitrile) fibers were studied. Addition of non-solvent to the spinning dope increased dope viscosity, the entanglement density of the polymeric solution and the number of entanglements per chain. Drawability of the as-spun fiber depended on the number of entanglements per polymer chain. Therefore, addition of non-solvent improved or spoiled drawability of the wet-spun fibers based on the concentration of the initial spinning dope. Hot-drawing and jet-stretching did not affect the fraction of nanovoids but shifted their size distribution towards smaller values. However, hot-drawing was more effective in reducing the overall porosity of the fibers in comparison with jet-stretching. Fiber tenacity increased when overall porosity decreased. Finally, strength-diameter correlation showed good agreement with the Griffith’s theory.

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Authors and Affiliations

  1. Engineering Faculty, Department of Textile Engineering, Guilan University, P.O. Box 41635-3756, Rasht, Iran

    Shahram Arbab

  2. Textile Engineering Department, Amirkabir University of Technology, P. O. Box 15875-4413, Tehran, Iran

    Shahram Arbab & Parviz Noorpanah

  3. Polymer Engineering Department, Amirkabir University of Technology, P. O. Box 15875-4413, Tehran, Iran

    Naser Mohammadi

  4. Institute of Technical and Macromolecular Chemistry, Department of Chemistry, University of Hamburg, Bundesstr. 45, 20146, Hamburg, Germany

    Ahmad Zeinolebadi

Authors
  1. Shahram Arbab
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  2. Parviz Noorpanah
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  3. Naser Mohammadi
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  4. Ahmad Zeinolebadi
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Correspondence to Shahram Arbab.

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Arbab, S., Noorpanah, P., Mohammadi, N. et al. Exploring the effects of non-solvent concentration, jet-stretching and hot-drawing on microstructure formation of poly(acrylonitrile) fibers during wet-spinning. J Polym Res 18, 1343–1351 (2011). https://doi.org/10.1007/s10965-010-9537-7

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  • DOI: https://doi.org/10.1007/s10965-010-9537-7

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