Abstract:

A series of conductive polymers poly（3，4-ethylenedioxythiophene）-poly（styrenesulfonate）/polyvinyl alcohol （PEDOT∶PSS/PVA） with semi-interpenetrating network structure were prepared by using linear poly（3，4-ethylenedioxythiophene）/polystyrene sulfonic acid （PEDOT∶PSS） and cross-linked polyvinyl alcohol （PVA） with different mass ratios. The properties of the conductive polymers were characterized by Fourier transform infrared spectrometer （FT-IR）， Raman spectrometer， X-ray diffractometer （XRD）， thermogravimetric analyzer， four-probe tester and electronic universal testing machine. The results show that PVA and PEDOT∶PSS can be well compatible in a certain range， and form a uniform morphology through hydrogen bonding. With the increase of PVA mass fraction， PEDOT∶PSS/PVA will reverse. When the mass fraction of PVA is 40%， the conductivity of PEDOT∶PSS/PVA is 1.85 S/m， the tensile strength is 16.83 MPa， and the elongation at break is 22.89%. PEDOT∶PSS/PVA can replace the wire to light a small bulb， and the resistance varies greatly with temperature， which is sensitive to temperature change.

Key words: Poly（3, 4-ethylenedioxythiophene）/polystyrene sulfonic acid, Polyvinyl alcohol, Electrographic gel