Chemical Modification Of Pan Precursors And Influences On Resultant Carbon Fibers

Polyacrylonitrile(PAN) precursors were modified with potassium permanganate(KMnO4), aiming to improving the molecular and morphology structures and mechanical performance of PAN fibers and resultant carbon fibers. Comparative studied on the thermo-chemical reactions of modified and unmodified fibers during the preparation of resultant carbon fibers were performed, by using convention test, FT-IR, SEM, and DSC, to analyze the relationship of thermo-chenmical reations and structures. Results indicated that the variety in thermo-chemical reactions of modified fibers had close relationships with theirs transformation of structure, and the tensile strength of resultant carbon fibers increased by30%. And the strain to failure of carbon fibers reached2.2%while the tensile strength was4.1GPa.