Synthesis, spectral, thermal, and flammability studies of phenolphthalein polyphosphate esters

Kishore, K. ; Kannan, P. (1990) Synthesis, spectral, thermal, and flammability studies of phenolphthalein polyphosphate esters Journal of Polymer Science Part A: Polymer Chemistry, 28 (12). pp. 3481-3486. ISSN 0887-624X

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/pola.19...

Related URL: http://dx.doi.org/10.1002/pola.1990.080281223

Abstract

Polyphosphate esters were synthesized from phenolphthalein and aryl phosphorodichloridates by interfacial polycondensation using a phase transfer catalyst. The polymers were characterized by IR, 1H-, 13C-, and 31P-NMR spectroscopy. The molecular weights were calculated by end group analysis using 31P-NMR spectral data. The thermal stability of the polymers was studied by thermogravimetry and the flammability was investigated by measuring limiting oxygen index values.

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