RETRACTED ARTICLE: Microstructure of poly(vinyl acetate)-block-poly(methyl acrylate- co -methyl methacrylate) block terpolymers. 2D NMR and thermal study
作者： Mahdi Moeud Ajjalallah , Mohammad Reza Rostami Daronkola
DOI: 10.1007/S13233-011-0213-5
关键词: Methyl methacrylate 、 Triad (anatomy) 、 Methacrylate 、 Vinyl acetate 、 Methylene 、 Polymer chemistry 、 Two-dimensional nuclear magnetic resonance spectroscopy 、 Poly(methyl acrylate) 、 Materials science 、 Glass transition
摘要: Structural analysis of the poly(vinyl acetate)-block-poly(methyl acrylate-co-methyl methacrylate) with different MA/MMA ratios was characterized by 1D and 2D NMR. The effect sequence distribution, composition stereoregularity on unknown signals α-CH3, backbone methylene methin carbons were analyzed (13C/DEPT-135) HSQC Furthermore, theoretical values triad, dyad triad fractions these confirmed spectral assignments. sensitivity vicinal geminal couplings protons to distribution using TOCSY NMR method. influence glass transition temperatures copolymers also examined Johnston (extended Fox) equation experimental Tg.
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