Application of Finish to Polyacrylonitrile-based Carbon Fiber

Polyacrylonitrile precursors were spun with itaconic acid as comonomer.The finish uptake in the precursors was controlled by adjusting the finishing process.Effects of 4 types of finish on the properties of the precursors and the pre-oxidation stabilized fibers were discussed.The results showed that the tensile strength and elongation at break of the finished precursors enhanced greatly,the fibers applied with the finish did not give fluff,broken and adhered precursors in the pre-oxidation process.The density of the pre-oxidation stabilized fibers applied with the finish was relatively lower compared with that of the import pre-oxidation stabilized fibers.Modified amino silicone oil could satisfy the requirements of spinning and could be used to produce high performance carbon fibers.