¹³C NMR spectral assignments of methacrylic acid/acrylonitrile statistical copolymers

Abstract

Copolymerization of methacrylic acid (M) and acrylonitrile (A) in bulk at 60°C gives a statistical copolymer. Through the use of 1H, 13C, DEPT and twodimensional NMR techniques, the observed resonances in the NMR spectra of these copolymers can be assigned, and thus provide detailed information about the microstructure of the polymer at the diad, triad and tetrad levels. Configurational effects have also been shown to play an important role, although in all cases the chemical shift differences resulting from configurational variation are smaller than those resulting from sequence variation.

Characterization and Structural Analysis of Solution-Grown Polyacrylonitrile-co-Methacrylic Acid (PAN-co-MAA) Single Crystals

“…As mentioned, the methacrylic acid (MAA) content in the polymer is only ∼4%. Several peaks associated with NMR spectra for MAA − are not observed in this spectrum. Therefore, its contribution to the CH peaks (Figure ) is not considered to be significant.…”

Investigation of microstructure of the acrylonitrile-styrene copolymers by 2-D NMR spectroscopy

“…9 -10 Barron et al 8 used DEPT for the resolution and assignments of the broad and overlapping aliphatic carbon resonances in Styrene/Maleic anhydride and Styrene/Acrylonitrile copolymers. 13 C-1 H inverse HETCOR is being used frequently for the compositional 11 and configurational [12][13][14] assignments of the polymers.…”

Microstructure analysis of poly(styrene-co-vinylidene chloride) copolymers by NMR spectroscopy

“…Two‐dimensional (2D) NMR spectroscopy has been demonstrated to be a useful technique for the both comonomer and stereosequence assignments for synthetic polymers 2–5. 2D‐heteronuclear NMR spectroscopy is being frequently used for the study of many homopolymers6–9 and copolymers 10–12…”