Abstract

The radiation behaviour of four aryloxy and one arylamino polyphosphazenes has been studied. In particular the gel formation has been measured as a function of the absorbed dose. The data have been interpreted in the form of Charlesby-Pinner plots, modified using the Dole-Inokuti relationship for an initial Schulz-Zimm molecular weight distribution. All the samples fitted the model well with no concurrent scission. The G( X) values were determined from the corresponding D gel values. The latter were obtained by extrapolation to S+;S 1 2 = 2.0. A wide range of G( X) values was found depending on the molecular structure of the polyphosphazenes. Possible reasons for the results are discussed.

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