Phosphorus containing poly(amid acid)s (PMDA-ODA) were simply obained in different phosphorus content through a phosphorylation reaction using phosphorus pentoxide. The phosphorylated poly(amid acid)s were thermally stabilized by treatment with lithim...
Phosphorus containing poly(amid acid)s (PMDA-ODA) were simply obained in different phosphorus content through a phosphorylation reaction using phosphorus pentoxide. The phosphorylated poly(amid acid)s were thermally stabilized by treatment with lithim chloride (LiCI). The structure and properties of the resulting polymers were characterized by IR, H-NMR, elemental analysis, XRD, DSC, TGA and dynamic mechanical analysis. The polymer films partially imidized at 140℃ for 6hr had Limiting Oxygen Index LOI values in the range of 67-78. TGA results indicated char yields in used as a fire safe material in heterocyclic precursor polymers.