Abstract
By NMR analysis of (acrylonitrile-methyl-methacrylate) copolymer (PAM), the methoxy resonance of the M units (M: methyl-methacrylate) adjacent to A (A: acrylonitrile) is shifted to lower magnetic fields [l], This phenomenon is due to the electronegativity of the substituant (CN) of the A units [l]. The resonances of α-methyl protons of the polymethyl methacrylate (PM), which are quite sensitive to the configurational effects of isotactic (i), heterotactic (h), and syndiotactic (s) triad sequences, could have a very complicated pattern in NMR spectra of PAM.
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References
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Pham, Q.T. (1971). The Cotacticity of (Acrylonitrile-Methyl-Methacrylate) Copolymer by NMR Spectroscopy. In: Diehl, P., Fluck, E., Kosfeld, R. (eds) Natural and Synthetic High Polymers. NMR Basic Principles and Progress / NMR Grundlagen und Fortschritte, vol 4. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-65089-5_7
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DOI: https://doi.org/10.1007/978-3-642-65089-5_7
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