Analusis 27, 847-853 (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. Nicole<sup>1

1</sup>  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