The base-free multicomponent polymerization of elemental sulfur, difluoromethylene phosphobetaine and amines toward electron-deficient aromatic polythioureas

Catalyst-free multicomponent polymerizations of sulfur, difluoromethylene phosphobetaine (PDFA), and amines were designed and developed to efficiently synthesize various polythioureas, including electron-deficient aromatic polythioureas.