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The 1 H and 13 C NMR spectra of an alternating ethene/maleic anhydride copolymer and the corresponding acid and sodium salt
Author(s) -
Komber Hartmut
Publication year - 1995
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1995.021960222
Subject(s) - maleic anhydride , copolymer , sodium salt , polymer chemistry , chemistry , salt (chemistry) , polymer , carbon 13 nmr , nmr spectra database , diastereomer , maleic acid , proton nmr , spectral line , organic chemistry , inorganic chemistry , physics , astronomy
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 threo ‐and erythro ‐ succinyl configurations was determined. Threo ‐ and erythro ‐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.