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Free radical oxidative copolymerization of indene with vinyl acetate and isopropenyl acetate: Synthesis and characterization
Author(s) -
De Priyadarsi,
Sathyanarayana D. N.
Publication year - 2002
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.10918
Subject(s) - copolymer , indene , polymer chemistry , vinyl acetate , peroxide , differential scanning calorimetry , monomer , reactivity (psychology) , chemistry , benzoyl peroxide , organic chemistry , polymer , medicine , physics , alternative medicine , pathology , thermodynamics
Copolyperoxides of different compositions of indene with vinyl acetate and isopropenyl acetate were synthesized by the free radical‐initiated oxidative copolymerization. The compositions of copolyperoxides obtained from 1 H‐ and 13 C‐NMR spectra have been used to determine the reactivity ratio of the monomers. The reactivity ratios reveal that the copolyperoxides contain a larger proportion of the indene units in random placement. The NMR studies further suggest irregularities in the copolyperoxide chain possibly due to the cleavage reactions of the propagating peroxide radical. The thermal analysis by differential scanning calorimetry (DSC) supports the alternating peroxide units in the copolymer chain. The activation energy for the thermal degradation suggests that the degradation is dependent on the dissociation of the peroxide (OO) bonds in the copolyperoxide chain. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86:639–646, 2002