Living Cationic Polymerization of Phosphoranimines as an Ambient TemperatureRoute to Polyphosphazenes with Controlled Molecular Weights

摘要

A new method for the synthesis of poly(dichlorophosphazene) at ambienttemperatures is described. The molecular weight of poly(dichlorophosphazene) was controlled by altering the ratio of monomer to initiator. The polymer chains were found to be active after chain propagation since further addition of monomer resulted in the formation of higher molecular weight polymer. Integration of (1)H and (31)P NMR spectra of these reactions revealed that the polymerization follows first order reaction kinetics with respect to monomer concentration.