Synthesis, microstructure, and acidity of poly (vinylphosphonic acid)

被引:130
作者
Bingol, Bahar [1 ]
Meyer, Wolfgang H. [1 ]
Wagner, Manfred [1 ]
Wegner, Gerhard [1 ]
机构
[1] Max Planck Inst Polymer Res, D-55128 Mainz, Germany
关键词
cyclopolymerization; microstructure; NMR; polyelectrolytes; radical polymerization; vinylphosphonic acid;
D O I
10.1002/marc.200600513
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Vinylphosphonic acid is polymerized at 80 degrees C by free radical polymerization to give a high-molecular-weight polymer ((M) over bar (w) of 6.2 x 10(4)) as determined by static light, scattering. High-resolution NMR spectroscopy is used to gain microstructure information. Information based on tetrad probabilities is utilized to deduce an almost atactic configuration. In addition, C-13 NMR spectroscopy give I S evidence for the presence of head-to-head and tail-to-tail links. Refined analysis of the H-1 NMR spectra allows for the quantitative determination of the fraction of these links (23.5% of all links). Experimental evidence suggests that the polymerization proceeds via cyclopolymerization of the vinylphosphonic acid anhydride as an intermediate. Titration curves indicate that high-molecular-weight poly (vinylphosphonic acid) PVPA behaves as a monoprotic acid.
引用
收藏
页码:1719 / 1724
页数:6
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