Synthesis of polypyrrole/polythiophene copolymers in supercritical carbon dioxide

摘要: Synthesis and processing of polymer-based materials through green friendly methods involving supercritical fluids particularly carbon dioxide (SCC) has recently received substantial technological importance because the commercial industrial benefits involved. In present work, a SCC assisted sustainable process been developed to synthesize polypyrrole/polythiophene copolymers (PPCs). The synthesis conducted ferric chloride-initiated chemical oxidative polymerization in presence various molar proportions pyrrole thiophene 0:1.0, 1.0:0, 1.0:1.0 1.0:2.0 at temperature ranging from 50 90 °C, 1,200 psi over 12 h SCC. Polymerization below 90 °C afforded PPCs semi-solid products, whereas polymerizations under identical conditions have end products complete solid state. structure properties evaluated ultraviolet–visible absorption Fourier transform infrared spectra, elemental analysis, atomic force microscopy, simultaneous thermogravimetric–differential thermal analysis–differential thermogravimetry four-point probe electrical conductivity methods. With proportion thiophene, time temperature, all reactions completion resulting with enhanced yield, rheoviscosity, dispersion polypyrrole into polythiophene matrix stability. This contributed loss PPCs.