Abstract
The electrospinning conditions of aqueous and aqueous-alcoholic solutions of the triethylammonium salt of a polyamic acid derived from pyromellitic dianhydride and 4,4′-diaminodiphenyl ether in the concentration interval 8–15 wt % were studied comprehensively. The best operation characteristics of the nonwoven materials are reached when forming the fibers from a 10% solution of the prepolymer in a 70/30 wt % alcohol/water mixture at the reaction mixture viscosity in the interval 0.27–0.96 Pa s and the surface tension of 26 mN m−1. The dynamics of thermal imidization of the nonwoven material based on the triethylammonium salt polyamic acid was monitored by IR spectroscopy; it was found that the imide ring formation was complete at 200°C. Samples of the nonwoven polyimide material were obtained, and their deformation, strength, and thermal properties were determined.
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The study was financially supported by the Russian Foundation for Basic Research, project no. 18-03-00568_a.
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Russian Text © The Author(s), 2020, published in Zhurnal Prikladnoi Khimii, 2020, Vol. 93, No. 1, pp. 43–53.
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Svetlichnyi, V.M., Vaganov, G.V., Myagkova, L.A. et al. Electrospinning of Aqueous Solutions of a Triethylammonium Salt of Polyamic Acid and Properties of the Nonwoven Polyimide Materials. Russ J Appl Chem 93, 35–44 (2020). https://doi.org/10.1134/S1070427220010048
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DOI: https://doi.org/10.1134/S1070427220010048