Free Access
Issue |
Analusis
Volume 27, Number 10, December 1999
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Page(s) | 847 - 853 | |
Section | Original articles | |
DOI | https://doi.org/10.1051/analusis:1999152 |
Analusis 27, 847-853 (1999)
DOI: 10.1051/analusis:1999152
1 Université Henri Poincaré Nancy 1, Laboratoire de Chimie Physique Organique et Colloïdale, BP 239, F-54506 Vandoeuvre-lés-Nancy, Cedex, France
2 Polish Academy of Sciences, Institute of Coal Chemistry, ul. Sowinskiego 5, PL-44121 Gliwice, Poland
(Received June 16, 1999; revised November 5, 1999; accepted November 5, 1999.)
Key words: 13C NMR / poly(methyl methacrylate) / sequence distribution.
© EDP Sciences, Wiley-VCH 1999
DOI: 10.1051/analusis:1999152
Incremental method for determination of sequence distribution of poly(methyl methacrylate) by 13C NMR spectroscopy
G. Nguyen1, M. Matlengiewicz2 and D. Nicole11 Université Henri Poincaré Nancy 1, Laboratoire de Chimie Physique Organique et Colloïdale, BP 239, F-54506 Vandoeuvre-lés-Nancy, Cedex, France
2 Polish Academy of Sciences, Institute of Coal Chemistry, ul. Sowinskiego 5, PL-44121 Gliwice, Poland
(Received June 16, 1999; revised November 5, 1999; accepted November 5, 1999.)
Abstract
A method of incremental calculation of chemical shifts in the 13C NMR spectra for different
configurational-compositional sequences, developed for copolymer of methyl methacrylate and ethyl
acrylate, PMMA/EA, has been applied to poly(methyl methacrylate) samples of different tacticity. The
numerical values of the increments determined for the copolymer can be used in the case of the homopolymer
after only minor modifications. A very good agreement between the experimental and simulated spectra was
obtained at the triad and pentad level, while the heptad splittings were too small to be decisive.
Key words: 13C NMR / poly(methyl methacrylate) / sequence distribution.
© EDP Sciences, Wiley-VCH 1999