Synthesis, Microstructure, and Acidity of Poly(vinylphosphonic acid)
作者： Gerhard Wegner , Bahar Bingöl , Wolfgang H. Meyer , Manfred Wagner
关键词: Titration curve 、 Polymer 、 Acid–base titration 、 Polymerization 、 Tacticity 、 Radical polymerization 、 Nuclear magnetic resonance spectroscopy 、 Polymer chemistry 、 Vinylphosphonic acid 、 Chemistry 、 Organic chemistry 、 Materials Chemistry 、 Polymers and Plastics
摘要: Summary: Vinylphosphonic acid is polymerized at 80 °C by free radical polymerization to give a high-molecular-weight polymer ( of 6.2 × 104) as determined static light scattering. High-resolution NMR spectroscopy used gain microstructure information. Information based on tetrad probabilities utilized deduce an almost atactic configuration. In addition, 13C gives evidence for the presence head-to-head and tail-to-tail links. Refined analysis 1H spectra allows quantitative determination fraction these links (23.5% all links). Experimental suggests that proceeds via cyclopolymerization vinylphosphonic anhydride intermediate. Titration curves indicate poly(vinylphosphonic acid) PVPA behaves monoprotic acid. Radical its anhydride.
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