Study on antistatic properties of networked polypyrrole/polyurethane composites
In the preparation of polymer antistatic composites using conductive fillers,the addition amount of a conductive filler directly determines the conductivity of the resulting composites;however,the microscopic morphology of the con-ductive filler inventively affects the efficacy of the conductive channel.Polypyrrole(PPy)materials with different net-work structural features were prepared by using a soft template,and the PPy/polyurethane(PU)composites were pre-pared through solution blending.The effect of structural difference in PPy on the electrical conductivity of the composites was investigated.The electrical conductivity of PPy/PU composites at a PPY addition amount of 1 wt%～3 wt%was analyzed by using networked PPy materials with a line diameter in the ranges of 20～35 nm and 30～50 nm,and their electrical conductivities reached were an order of 10-7 S/m compaed to the PPy particles.The composites all showed a decrease in electrical conductivity under 100%～500%deformation.However,the electrical conductivity of the net-worked PPy/PU composites only decreased by one order of magnitude,and the electrical conductivies of the composites containing 1 wt%and 3 wt%PPy particles were identical.The results indicated that the native network of the networked conductive filler could maintain the integrity of conductive channels in the composites under deformation of the compos-ites.This allows the materials to maintain a high conductivity under deformation.
万方数据
维普
