Journal :   Asian Journal of Research in Chemistry

Volume No. :   1

Issue No. :  2

Year :  2008

Pages :   58-63

ISSN Print :  0974-4169

ISSN Online :  0974-4150


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Reactivity ratios, thermal and di-electrical properties of 1, 11 azobis (cyclohexanecarbonitrile) initiated nitrile copolymer



Address:   K Rajani Kumar, SK Feroz and P Raghunath Rao*
Department of Chemistry, Kakatiya University, Warangal- 506 009
* Corresponding Author
DOI No:

ABSTRACT:
Copolymer of acrylonitrile (AN) with vinyl propionate (VP) was synthesized by free radical polymerization using 1, 1' azo bis-cyclohexanecarbonitrile (VAZO) as initiator in dimethyl formamide (DMF) at 60±1 0C. The monomer reactivity ratio was computed by both Fineman-Ross (F-R) and Kelen-Tudos (K-T) methods. The reactivity ratio values suggest the formation of random copolymers which has been supported by the azeotropic composition evaluation. The mean sequence length ( n 1 ) and probabilities (p) in the formation of various structural units were evaluated. The molecular weights of the polymers were determined by gel permeation chromatography, which increase with the increase of the AN content. The solubility parameters were determined with the viscometric method. The glass transition temperature (Tg) of the copolymers were determined by differential scanning calorimetry (DSC). Thermogravimetric analysis (TGA) of the copolymer was also studied. The di-electrical property of the copolymer is also studied.
KEYWORDS:
Vinyl propionate / Reactivity ratios / Thermal properties and Di-electrical property.
Cite:
K Rajani Kumar, SK Feroz, P Raghunath Rao. Reactivity ratios, thermal and di-electrical properties of 1, 11 azobis (cyclohexanecarbonitrile) initiated nitrile copolymer. Asian J. Research Chem. 1(2): Oct.-Dec. 2008; Page 58-63.
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