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Copolymerization of 1,2:3,4-di-o-isopropylidene-5,6-exo-α-d-galactosene Monomer | ||
| Al-Mustansiriyah Journal of Science | ||
| Article 1, Volume 21, Issue 6, 2010, Pages 160-169 | ||
| Author | ||
| Yousif Ali Al-Fattahi | ||
| Abstract | ||
| copolymerization of the 1,2:3,4-di-o-isopropylidene-5,6-exo-α-d-galactosene with vinyl monomer such as : styrene, vinyl-acetate, methylacrylate , maleic anhydride and acrylonitrile were carried out in toluene solution using dibenzoyl peroxide as initiator at 80 ○C . The structures and compositions of the saccharide homo and co-polymers were established by 1HNMR and FT-IR spectroscopy . Reactivity ratios of vinyl sugar ( r2 ) with styrene ( r1 ) ,( ratio of the rate constant for adding its own monomer to that for adding the other monomer) were determined by Fineman-Rose(F-R) and Kelen-Tüdös (K-T) methods. The values are r1 = 0.83 , r2 = 0.21 for F-R method and r1 = 0.74 , r2 = 0.2 for K-T method and the composition of copolymer was random copolymer | ||
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