X. Jin, C. F. Xiao, S. L. An, G. X. Jia, Y. Y. Wang
March 26, 2013
Carbon black (CB) was added into a matrix of poly(ethylene terephthalate) (PET) by melt processing to prepare electrically conductive master batch (ECMB) for fiber applications. The amount of CB required to achieve a desired electrical property often results in poor mechanical properties of the final fibers. To solve this problem, a type of ECMB with a lower percolation threshold was designed by incorporating titanate coupling agent treated CB and using a matrix blend (adding polyethylene (PE) into PET). The effects of titanate coupling agent treatment and the matrix blend on the percolation threshold of ECMB are discussed and the effect of lower percolation threshold on the mechanical properties of final melt-spun fibers was investigated. The results indicated that titanate coupling agent treatment and a matrix blend are able to reduce the percolation threshold and thereby minimize problems with the mechanical properties of the final fibers, yet maintain the desirable electrical property.