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Solubility of Highly Isotactic Polyacrylonitrile in Dimethyl Sulphoxide

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Abstract

The solubility of highly isotactic acrylonitrile homopolymer into dimethyl sulphoxide (DMSO) was measured. The dissolution of polymer increases drastically at temperature greater than some critical threshold and this process is a thermodynamic equilibrium process. It is shown that the dissolution temperature can be summarized as a function of molecular structural parameters. The dissolution temperature decreases with addition of KCl and NaCl and effect of NaCl is more prominent than KCl. As the concentration of KCl and NaCl increases beyond 0.025 mol/L, the dissolution temperature then increases. There is a decrease in the dissolution temperature of polyacrylonitrile containing sodium ethoxide and sodium hydroxide, and the dissolution temperature increases as the concentration of sodium ethoxide and sodium hydroxide increases beyond 0.01 mol/L. The dissolution temperature of polyacrylonitrile increases continuously with addition of diethylamine. A relationship between the dissolution temperature and the value of isotacticity of polyacrylonitrile was quantitatively obtained.

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Authors and Affiliations

  1. College of Chemistry and Materials Science, Yantai Normal University, Yantai, 264025, China

    Hou Chen

  2. Shandong Provincial Institute of Metrology, Jinan, 250014, China

    Ying Liang

  3. Carbon Fiber Center, College of Materials Science and Engineering, Shandong University, Jinan, 250061, China

    Cheng-Guo Wang

Authors
  1. Hou Chen
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  2. Ying Liang
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  3. Cheng-Guo Wang
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Correspondence to Hou Chen.

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Chen, H., Liang, Y. & Wang, CG. Solubility of Highly Isotactic Polyacrylonitrile in Dimethyl Sulphoxide. J Polym Res 12, 325–329 (2005). https://doi.org/10.1007/s10965-004-6387-1

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  • DOI: https://doi.org/10.1007/s10965-004-6387-1

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