Thermo-Chemical Reactions of Modified PAN Fibers during Heat-Treatment Process
Thermo-chemical reactions of modified PAN fibers during heat-treatment process were systematically studied by DSC, FT-IR, EA, XPS, etc. Comparing with original PAN fibers, chemical reactions, structures and elemental compositions of fibers modified with potassium permanganate (KMnO4) were all changed at a certain extent. KMnO4 had reduced the activation energy of cyclization reactions, decreased the area and widened the peak of exothermic curve, decreased the velocity of cyclization reaction, increased the oxygen content about 67%, hence increased C-O-C and C=O groups and the core/shell ratio.
Masayuki Nogami, Riguang Jin, Toshihiro Kasuga and Wantai Yang
Y. Wang, J. Liu, J. Y. Liang, "Thermo-Chemical Reactions of Modified PAN Fibers during Heat-Treatment Process", Advanced Materials Research, Vols. 11-12, pp. 73-76, 2006