Premium
Thermal stabilization of polyacrylonitrile fibers
Author(s) -
Ko TseHao,
Ting HsingYie,
Lin ChungHua
Publication year - 1988
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1988.070350306
Subject(s) - polyacrylonitrile , activation energy , potassium permanganate , ultimate tensile strength , materials science , aromatization , composite material , chemical engineering , thermal oxidation , polymer chemistry , chemistry , organic chemistry , catalysis , polymer , layer (electronics) , engineering
Polyacrylonitrile (PAN) fibers pretreated with potassium permanganate have reduced the activation energy of cyclization and the oxidation time, and also improved the properties of the resultant carbon fibers. The activation energy of cyclization is reduced to 24 ± 1 kcal/mol from 30 ± 3 kcal/mol and the tensile strength of the carbon fibers increases by about 20−40%. The method of measuring the “aromatization index” (AI) value is modified and is recommended in checking the oxidation process. All fully stabilized PAN fibers have almost the same AI value. However, the oxidation time is decreases by 30 min when oxidation temperature is raised by 10°C.