The reasons for tarformation from polyacrylonitrile-based carbon fiber were analyzed from the structure and the production line, from as-spun fiber, pre-oxidation to carbonization.
By using this new process the end product can he obtained with high yield and excellent purity. Tarformation and reaction time can he also reduced thus increasing the economic, results greatly.
The kinetics of mesophase formation from two sorts of coal tar pitch with different primary QI content is studied in this paper. The kinetic parameters are determined.