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Determination of the reactivity ratios for the oxidative copolymerizations of indene with methyl, ethyl and butyl acrylates

De, Priyadarsi and Sathyanarayana, DN (2002) Determination of the reactivity ratios for the oxidative copolymerizations of indene with methyl, ethyl and butyl acrylates. In: Macromolecular Chemistry and Physics, 203 (3). 573-579 .

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/1521-39...

Abstract

Full Paper: The copolyperoxides of various compositions of indene with methyl acrylate, ethyl acrylate and butyl acrylate have been synthesized by the free-radical-initiated oxidative copolymerization. The compositions of copolyperoxide obtained from H-1 and C-13 NMR spectra have been used to determine the reactivity ratios of the monomers. The copolyperoxides contain a greater proportion of the indene units in random placement. The NMR studies have shown irregularities in the copolyperoxide chain due to the cleavage reactions of the propagating peroxide radical. The thermal analysis by differential scanning calorimetry suggests alternating peroxide units in the copolyperoxide chain. From the activation energy for the thermal degradation, it was inferred that degradation occurs via the dissociation of the peroxide (O-O) bonds of the copolyperoxide chain. The flexibility of the polyperoxides in terms of glass transition temperature (T-g) has also been examined.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to John Wiley and Sons.
Keywords: chain irregularities;copolymerization;differential scanning calorimetry (DSC);exothermic degradation;reactivity ratio
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 20 Jul 2011 10:16
Last Modified: 20 Jul 2011 10:16
URI: http://eprints.iisc.ernet.in/id/eprint/39139

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