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|Title:||Microstructure determination of styrene-acrylonitrile copolymers by 13C NMR spectroscopy|
|Authors:||Brar, A S|
Kapur, G S
|Abstract:||Styrene-acrylonitrile (S-A) copolymers having different proportions of the monomers have been bulk copolymerised at 70°C,using benzoyl peroxide as the initiator. The reactivity ratios have been calculated using the Kelen-Tudos method. A detailed study of the microstructure of the copolymers has been carried out using 13C NMR spectroscopy. The experimental styrene-and acrylonitrile-centered triad sequence distributions have been determined by using aromatic (C1) carbon and nitrile (- CN) carbon resonances, respectively. These results are found to be in good agreement with those calculated theoretically using reactivity ratios1 [Harwood H J, J polym Sci, 25 (1968) 37].|
|Appears in Collections:||IJC-A Vol.29A(05) [May 1990]|
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