Abstract: UHMWPE/PANI composite fibers were prepared by in-situ polymerization in this paper. The kinds of oxidant and the concentration of ammonium persulfate on the electrical conductivity and surface morphology of composite fibers were investigated. The chemical construction and mechanical property of composite fibers were also studied. The results indicated that the composite fibers prepared by in-situ polymerization can get a certain amount of conductive ability , and the electrical conductivity reached 10-1S/cm with ammonium persulface as oxidant. The electrical conductivity increased at the first and then decreased with the increase of concentration of ammonium persulface, the highest electrical conductivity obtained with the concentration of ammonium persulface of 30g/L. The FTIR curves indicated that the composite fiber was a blending system of matrix fiber and PANI, and the chemical construction of matrix fiber was unchanged. The fiber’s breaking strength increased a little and breaking elongation unchanged basically after conductive processing.

Key words: UNMWPE fiber, PANI, in-situ polymerization, mechanical property