Nicolas Theophilou

E.s.r. study of the Ti(OBu)4 catalyst mixture in silicone oil with regard to the synthesis of homogeneous and highly conducting (CH)x

Abstract E.s.r. spectra of a homogeneous catalyst system based on n -butyltitanate and triethylaluminium in a Al/Ti molar ratio of four were recorded in silicone oil at temperatures ranging from 22 – 130 °C. They contained signals with G values of 1.954, 1.972, 1.977, and 1.986, whose intensities varied with the ageing temperature. It is shown that increasing the catalyst ageing temperature above 100 °C favours only the active species with G value 1.954. This could be related to the initial rate of polymerization and to the synthesis of a more homogeneous, regular and highly conducting (CH) x film after doping with a 0.25 M FeCl 3 -nitromethane solution.