Thermal stability of phosphonitrilic fluoroelastomers

Abstract

Abstract The thermal stability of the polymer prepared by substituting poly(dichlorophosphazene) with an excess of a 64/36 mole‐% mixture of the sodium salts of 2,2,2‐trifluoroethanol/2,2,3,3,4,4,5,5‐octafluoropentanol were studied by thermogravimetric and gel permeation chromatography techniques. The primary mode of degradation of this polymer was shown to be via random scission. The overall degradation reaction corresponds to quasi‐zero‐order kinetics.