Abstract
The doping of highly oriented poly( p-phenylene vinylene) films prepared by the zone-reaction method was performed with various acids, HCl, H 2SO 4, and H 3PO 4. The changes in the microstructure, electrical, tensile, and viscoelastic properties of the resulting films were studied. It was found that the doping of HCl and H 2SO 4 increased the electrical conductivity to 186 and 61 S cm −1 at the doping time of 6 and 1.5 h, respectively. A further doping, however, lowered the conductivity, which was associated with the relaxation of molecular orientation. The zone-reacted film doped with HCl preserved Young's modulus and tensile strength as high as 44.7 and 0.73 GPa, where dynamic storage modulus was 49 GPa at 25 °C and held 21 GPa at 400 °C.
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