THE TRIAD DISTRIBUTION AND THE CIS TRANS CONFIGURATIONS AT THE CYCLICMALEIC-ANHYDRIDE UNITS IN MALEIC ANHYDRIDE-STYRENE COPOLYMERS PREPARED IN N,N-DIMETHYLFORMAMIDE/

Authors
HA NTH FUJIMORI K TUCKER DJ
Citation
Nth. Ha et al., THE TRIAD DISTRIBUTION AND THE CIS TRANS CONFIGURATIONS AT THE CYCLICMALEIC-ANHYDRIDE UNITS IN MALEIC ANHYDRIDE-STYRENE COPOLYMERS PREPARED IN N,N-DIMETHYLFORMAMIDE/, Journal of macromolecular science. Pure and applied chemistry, A33(9), 1996, pp. 1209-1216
Citations number
22
Categorie Soggetti
Polymer Sciences
Journal title
Journal of macromolecular science. Pure and applied chemistry → ACNP
ISSN journal
10601325
Volume
A33
Issue
9
Year of publication
1996
Pages
1209 - 1216
Database
ISI
SICI code
1060-1325(1996)A33:9<1209:TTDATC>2.0.ZU;2-8
Abstract
The monomer unit sequence distribution and the cis/trans linkage confi gurations of maleic anhydride units in maleic anhydride (Ma)-styrene ( St) copolymers prepared in N,N-dimethylformamide with N,N'-azobisisobu tyronitrile at 50 degrees C over a wide range of Ma monomer feed mole fractions were determined using DEFT C-13-NMR spectroscopy. It was fou nd that when the Ma feed mole fraction is more than 0.4, the monomer u nit sequence becomes almost alternating and the mole fraction of the c is linkages at the Ma units in the copolymer attain a nearly defined m aximum value of 0.54 +/- 0.06.