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Title: Microstructure determination of styrene-acrylonitrile copolymers by 13C NMR spectroscopy
Authors: Brar, A S
Kapur, G S
Sekhar, MS
Issue Date: May-1990
Publisher: NISCAIR-CSIR, India
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].
Page(s): 425-430
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.29A(05) [May 1990]

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