Conclusions
-- The introduction of foreign methyl acrylate units (up to 4%) or acrylic (or methacrylic) acid (up to 3%) into the polyacrylonitrile chain aids in developing a higher degree of structure orientation as compared with fibres prepared from the copolymer usually employed under industrial conditions (AN-MA-IA). Apparently, the nature of the copolymers and the high molecular weight of the copolymer at low synthesis temperatures also has an effect.
-- With increase in the content of foreign units in the polyacrylonitrile chain, a more significant loosening in structure of the internal fibre region takes place.
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A. A. Mamazhanov, G. Khamrakulov, K. É. Érgashev, and M. A. Askarov, Preparation and Study of Some Physico-Chemical Characteristics of Ternary Acrylonitrile Copolymers [in Russian], Dep. v UzNIINTI, No. 806-Uz88.
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Translated from Khimicheskie Volokna, No. 6, pp. 44–46, November–December, 1990.
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Mamazhanov, A.A., Kerimova, N.G., Nikonovich, G.V. et al. Electron-microscopic studies of the structure of fibres based on copolymers of acrylonitrile with methyl acrylate and acrylic (or methacrylic) acid. Fibre Chem 22, 416–418 (1990). https://doi.org/10.1007/BF00632897
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DOI: https://doi.org/10.1007/BF00632897