Study of the process of poly(phenylquinoxaline)s formation in supercritical carbon dioxide

•A new and effective method for the synthesis of film-forming poly(phenylquinoxaline)s in supercritical CO2 is proposed.•Thermal and mechanical properties of synthesized polymers were evaluated.•The obtained PPQs form smooth, uniform films without any apparent cracks or holes, almost non-defective ones.

A study of the formation of poly(phenylquinoxaline)s in supercritical carbon dioxide was performed. It was found that the reaction conditions of cyclopolycondensation had a significant impact on the formation of polymers. When using certain catalysts, soluble polymers were obtained which were cast into thin films and some of their properties were then studied.

Graphical abstractPoly(phenylquinoxaline)s synthesis. (1)–high-pressure vessel; (2)–thermostat; (3)–monomers; (4)–high-pressure valves; (5)–high-pressure tubing system; (6)–manometers; (7)–high-pressure generator; (8)–СО2 tank.Figure optionsDownload full-size imageDownload as PowerPoint slide