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Hydrolytic degradation and diffusion studies on a polyphosphate ester

Narendran, N and Kishore, K (2002) Hydrolytic degradation and diffusion studies on a polyphosphate ester. In: Journal of Applied Polymer Science, 84 (4). pp. 701-708.

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/app.100...

Abstract

A polyphosphate ester was synthesized by interfacial polycondensation of bisphenol-A and phenylphosphorodichloridate. Accelerated hydrolytic degradation studies were conducted under alkaline conditions. The effect of concentration of alkali and temperature were monitored. The rate of degradation reached a maximum value at 6 molar sodium hydroxide solution and then reduced. The activation energy for hydrolytic degradation was found to be 45 kcal/mol. Diffusion of alkali into the polymer pellet was studied at various concentrations of alkali and at various temperatures. The rate of diffusion also attained a maximum at 6M NaOH and the activation energy for diffusion process was found to be 12 kcal/mol. (C) 2002 John Wiley Sons, Inc.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to John Wiley and Sons.
Keywords: hydrolytic degradation;polyphosphate ester;rate of degradation;rate of diffusion;activation energy
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 19 Jul 2011 05:35
Last Modified: 19 Jul 2011 05:35
URI: http://eprints.iisc.ernet.in/id/eprint/39235

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