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.
All Science Journal Classification (ASJC) codes
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry
- Materials Chemistry