Hydrogen and carbon-13 nuclear magnetic resonance investigation of the intramolecular structure of solution and emulsion styrene-methyl acrylate copolymers

Abstract

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Copolymers of 4-nitrophenyl methacrylate with styrene: Synthesis, characterization, and reactivity ratios

“…7 The intramolecular structure of styrenemethacrylate (STY-MA) copolymers was evaluated by 1 H-and 13 C-NMR studies and also by 2D-NMR COLOC experiments. 8 The use of phenyl (meth)acrylates as weather-resistant, highglass top coats for automobile finishes has been reported. 9 Poly(phenyl methacylates) are harder polymers of higher tensile strength and lower elongation than their acrylate counterparts because substitution of the methyl group for the ␣-H on the main chain restricts the freedom of rotation and motion of the polymer backbone.…”

Microstructures of Styrene-Acrylamide Copolymers Using 13C NMR Spectroscopy

“…Van Doremaelae et a/. 9 have reported a similar type of assignment for styrene/methyl acrylate copolymers. Concentration of various A-centered triads can be calculated from the relative areas of respective signals.…”

“…Hence it is of interest to examine the microstructure and statistics of this copolymerization using 13 C NMR spectroscopy. Although a variety of copolymers of acrylamide ( acrylamide-acrylic acid), 4 -7 trimellictic anhydride-co-imides, 8 and styrene (styrene-methacrylate, 9 styrene-methacrylonitrile 10 ) has been studied by 13 C NMR spectroscopy, there is no report in the literature on poly( styrene-co-aery !amide )s.…”

Characterization of styrene/methacrylic acid copolymers by 2D‐NMR spectroscopy

“…The spatial coupling between the methylene dyads SS and MS with the phenylic protons was observed and it was assigned to SSrSS (7), SSrSM (8), and MSrSM (9) tetrads for the coupling with SS at ␦1.4/6.88, ␦1.45/7.1, and ␦1.58/7.15 ppm, respectively. The SMmSS (10), SMmSM (11), and MMmSM (12) tetrads for the spatial coupling of the MS dyad with styrene protons at ␦1.6/6.92, ␦1.85/7.2, and ␦1.9/6.8 ppm were assigned. The dyad MM cannot have any crosspeak with phenylic protons, that is, it is evident from the NOESY spectra.…”

“…2D-heteronuclear NMR spectroscopy is being frequently used for the study of homopolymers 6 -9 and copolymers. 10 Van Doremaele et al 11 reported the intermolecular structure (triad distribution, tacticity parameter) of methyl acrylate-styrene copolymers using 1 H and 13 C experiments. Koinuma et al 12,13 interpreted the 13 C-NMR spectra of a methyl acrylatestyrene copolymer using a theoretical model.…”