Interfacial syntheses of polyphosphonate and polyphosphate esters. I. Effects of alkaline medium

Abstract

Abstract The effects on polymer yield and viscosity in the interfacial condensation of hydroquinone with phenylphosphonic dichloride as a function of the pH of the aqueous medium are reported. Reactions competing with polymer formation are discussed. The beneficial advantages in the use of soluble buffers or bases of limited water solubility to control pH are contrasted with results of conventionally used sodium hydroxide. The results of investigations of other comer pairs for which reaction conditions have not been optimized are also reported; desoxyribose and the diols: thymidine, resorcinol, 2,5‐dichlorohydroquinone, 1,3‐dihydroxyacetone, 1,4‐butanediol, tartaric acid, ethylene glycol, and 2,2‐dimethyl‐1,3‐propanediol are tabulated.