Abstract
The copolymerization of acrylonitrile (A) and 2-methoxyethyl acrylate (M) at three different molar in-feed compositions was carried out under atom transfer radical polymerization (ATRP) conditions using 2-bromopropionitrile (BPN) as initiator and CuCl/2,2′-bipyridine (bpy) as catalyst system in ethylene carbonate at 60 °C. Linear first order kinetics, linearly increasing molecular weight with conversion, and low polydispersities were observed for all the copolymerization. The copolymer compositions, obtained from 1H NMR spectra, were utilized to determine the monomer reactivity ratios (rA=1.52 and rM=0.60) involved in ATRP. Two-dimensional NMR [Heteronuclear Single Quantum Correlation (HSQC) and Total Correlated Spectroscopy (TOCSY)] experiments in conjunction with one-dimensional [1H, 13C{1H}, and distortionless enhancement by polarization transfer (DEPT)] experiments were employed for assigning the complex and overlapping signals to various compositional and configurational sequences. The spectral assignments of carbonyl as well as nitrile carbons were done with the help of heteronuclear multiple bond correlation spectra.
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Brar, A., Saini, T. 2D NMR Analysis of Acrylonitrile/2-Methoxyethyl Acrylate Copolymers Synthesized by Atom Transfer Radical Polymerization. Polym J 38, 1023–1034 (2006). https://doi.org/10.1295/polymj.PJ2006014
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DOI: https://doi.org/10.1295/polymj.PJ2006014
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