caa a22 4500 469058188 CHVBK 20180323132849.0 cr unu---uuuuu 170328e19920901xx s 000 0 eng 10.1007/BF00547627 doi (NATIONALLICENCE)springer-10.1007/BF00547627 Modification of polyacrylonitrile fibres to improve the properties of carbon fibres prepared from them [Elektronische Daten] [V. S”rmadzhieva, P. Mikhailova] Conclusions: -- 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. Plenum Publishing Corporation, 1992 S”rmadzhieva V. Bulgaria aut Mikhailova P. Bulgaria aut Fibre Chemistry Kluwer Academic Publishers-Plenum Publishers 23/5(1992-09-01), 392-396 0015-0541 23:5<392 1992 23 10692 https://doi.org/10.1007/BF00547627 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00547627 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- S”rmadzhieva V. Bulgaria aut NATIONALLICENCE 700 1- Mikhailova P. Bulgaria aut NATIONALLICENCE 773 0- Fibre Chemistry Kluwer Academic Publishers-Plenum Publishers 23/5(1992-09-01), 392-396 0015-0541 23:5<392 1992 23 10692 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer