Modification of polyacrylonitrile fibres to improve the properties of carbon fibres prepared from them
- 36 Downloads
-- It has been found that treatment of acrylonitrile fibres obtained by the wet dimethyl formamide method before thermal oxidation with inorganic salts considerably changes the properties of the thermally oxidized fibres.
-- On treatment of the fibres with an aqueous solution containing copper ion in a reducing medium, their sorptive powers are considerably impaired, the fibre diameter is increased, and the electrical conductivity is increased, plus processes of cyclization and oxidation are accelerated.
-- On treatment with a solution of aluminum chloride in the presence of orthophosphoric acid, the fibre structure is made denser and its strength is increased.
-- Sodium thiosulfate as a modifier considerably changes the functional composition of polyacrylonitrile fibres; thereupon, a process of structural amorphization takes place.
KeywordsElectrical Conductivity Orthophosphoric Acid Carbon Fibre Sodium Thiosulfate Formamide
Unable to display preview. Download preview PDF.
- 1.A. A. Konkin, Carbon and Other Heat-Resistant Fibrous Materials [in Russian], Khimiya, Moscow (1974), pp. 166–170.Google Scholar
- 2.M. O. Aslanova, A. A. Konkin, G. I. Kudryavtsev, et al., In: Heat and Flame Resistant Fibers [in Russian], A. A. Konkin (ed.), Khimiya, Moscow (1978), pp. 260–273.Google Scholar
- 3.S. Simamura, Carbon Fibres [Russian translation], Mir, Moscow (1987), pp. 31–50.Google Scholar
- 4.French Patent 1602487 (1971).Google Scholar
- 5.U. S. Patent 4460650 (1984).Google Scholar
- 6.U. S. Patent 1578492 (1980).Google Scholar
- 7.Inventor's Certificate 389012 (1973) (USSR).Google Scholar
- 8.S. Karaivanova and A. Badev, Angew. Makromol. Chem., 140, 32 (1986).Google Scholar
- 9.R. B. Mathur, D. Gubta, O. P. Bahl, and T. L. Dhami, Fibre Sci. and Technol., 20, 227–234 (1984).Google Scholar
- 10.E. N. Zil'berman, Uspekhi Khimii, 4, No. 1, 62–78 (1986).Google Scholar
- 11.Sh. G. Abdurakhmanova, I. F. Khudoshev, and T. I. Dvalishvili, Khim. Volokna, No. 4, 40–41 (1989).Google Scholar
- 12.A. N. Grebenkin, E. P. Romanova, A. I. Kol'tsov, and E. I. Firsov, Zhurn. Prikl. Khimii, No. 8, 1834–1837 (1985).Google Scholar
- 13.N. V. Platonova and I. V. Klimenko, Vysokomol. Soed., Ser. A, No. 11, 2464–2468 (1980).Google Scholar
- 14.E. P. Romanova and I. G. Rumynskaya, Vysokomol. Soed., Ser. A, No. 1, 45–52 (1986).Google Scholar
- 15.G. H. Olivé and S. Olivé, Adv. Polymer. Sci., 32, No. 1, 123 (1979).Google Scholar
- 16.U. S. Patent 4349523 (1982).Google Scholar