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Determination of the stereochemistry of maleic anhydride units in copolymers ofp-chlorostyrene with maleic anhydride via13C NMR spectroscopy

✍ Scribed by Paul G. Brown; Kiyohisa Fujimori

Publisher
Springer
Year
1992
Tongue
English
Weight
200 KB
Volume
29
Category
Article
ISSN
0170-0839

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πŸ“œ SIMILAR VOLUMES

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Semi-alternating copolymers were formed in the radical copolymerization of p-chlorostyrene (p-ClSt) with maleic anhydride (Man) in solu-CCl 4 tions at 50‘C. The triad distributions in the copolymers and the ratio of the amounts of entgegen (E) and zusammen (Z) linkage conÐgurations at the cyclic Man

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The configuration of citraconic (~-methylmaleic) anhydride units in styrene/citraconic anhydride copotymers prepared in methyl ethyl ketone at 50.0 + 0. V was determined over a wide range of comonomer feed compositions using ~3C-NMR spectroscopy. It was found that the ratio of Z (zusammen) to E (ent