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The 1H and 13C NMR spectra of an alternating ethene/maleic anhydride copolymer and the corresponding acid and sodium salt

โœ Scribed by Hartmut Komber

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
431 KB
Volume
196
Category
Article
ISSN
1022-1352

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โœฆ Synopsis

Abstract

The ^1^H and ^13^C NMR spectra of an alternating ethene/maleic anhydride copolymer and the corresponding acid and sodium salt were reinvestigated with regard to the signals depending on the configuration of the succinyl unit. From these assignments a 85/15 ratio of threoโ€and erythroโ€ succinyl configurations was determined. Threoโ€ and erythroโ€units are statistically distributed. Furthermore, signal splittings were observed due to microtacticity. Explanations are given for the signal fine structure. The polymer chain is atactic but a small degree of stereoregularity can be proved. T~1~ values and nuclear Overhauser effect (NOE) factors were determined; they correspond to investigations on other polymers.

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