ON THE INFLUENCE OF DOPING ON THE STRUCTURE OF ORIENTED POLY(3-DECYLTHIOPHENE)

The influence of doping on the molecular structure of Poly(3-decylthiophene) has been studied by use of X-ray diffraction. Samples were oriented by stretching and the diffraction patterns for two geometries of scattering have been obtained for pure and FeCl4--doped samples. Comparison of experimental diffraction spectra for unoriented and oriented samples, both for pure and doped samples, gives information about doping-induced structural changes of the polymer system. The main conclusion of our work is that the dopant molecules are located between the planes of polymer chains; their presence in these regions induces easier reorientation of polymer chains during stretching than for pure samples.