Synthesis of nadimide substituted fluorinated polyphosphazenes, i.e., PPZ (viz. PPZ-1 containing N-(4-hydroxyphenyl) chlorendimide, PPZ-2 containing N-(4-methylphenyl) nadimide and PPZ-3 containing N-(4-hydroxyphenyl) methyl nadimide) was carried out by substituting the chlorine atoms of polydichlorophosphazene by sodium salts of different nadimide derivatives and trifluoroethanol, and then their structural properties were corroborated by gel permeation chromatography, FTIR and NMR analysis. Their thermal analysis was performed with the help of differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The DSC showed the initiation in the decomposition of uncured PPZ resins after their melting which might be due to the commencement of retro-Diels-Alder reaction in the norbornene moieties present in the structure of uncured resins. Moreover, the TGA of uncured PPZ resins inferred that their decomposition temperatures were in the order of PPZ-1

Keywords:Nadimide substituted fluorinated polyphosphazenes;GPC;DSC;TGA;Isothermal aging