The Thermal Breakdown of Poly(diphenoxyphosphazene)

H. R. Allcock, G. Y. Moore, W. J. Cook

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62 Scopus citations


Poly (diphenoxyphosphazene), [NP(OC6H5)2]n was subjected to thermal degradation studies over the temperature range of 100–400°, and the reaction products were analyzed by gel permeation chromatography, solution viscosity, and mass spectrometry. A general lowering of the molecular weight with increasing temperature was observed at temperatures above 100°. An initial sharp decrease in molecular weight was ascribed to chain cleavage at weak points along the backbone, and the formation of cyclic oligomers appeared to result from a subsequent cyclization-depolymerization process. The mechanism whereby chlorobenzene is formed as a trace fragmentation species is discussed. Depolymerizations in solution at temperatures between 30 and 161° were also studied.

Original languageEnglish (US)
Pages (from-to)571-575
Number of pages5
Issue number5
StatePublished - Sep 1 1974

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry


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