Volume 27, Number 10, December 1999
|Page(s)||847 - 853|
Incremental method for determination of sequence distribution of poly(methyl methacrylate) by 13C NMR spectroscopyG. Nguyen1, M. Matlengiewicz2 and D. Nicole1
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.)
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