Stereoregularity of poly(α‐methylvinyl alkyl ether)s determined by 1H‐ and 13C‐NMR spectroscopy
Stereoregularity of poly(α‐methylvinyl alkyl ether)s determined by 1H‐ and 13C‐NMR spectroscopy
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通过 1H 和 13C-NMR 光谱测定聚（α-甲基乙烯基烷基醚）的立构规整性
DOI：
10.1002/pol.1979.170171104
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发表时间：
1979
期刊：
影响因子：
--
通讯作者：
T. Kanai
中科院分区：
文献类型：
--
作者：
K. Matsuzaki;S. Okuzono;T. Kanai
在不同的聚合条件下对α-甲基乙烯基甲基醚、乙醚和异丁基醚进行了聚合，并通过1H- nmr和13C-NMR测定了聚合物的结构。聚α-甲基乙烯基异丁基醚的α-甲基碳和β-亚甲基碳光谱呈分裂状，分别用三联体和四联体序列进行了分析。聚α-甲基乙醚的β-亚甲基碳谱也出现分裂。当添加Eu(food)3时，聚α-甲基乙烯基甲基醚在苯中的α-甲基和甲氧基质子光谱呈现出三位一体的分裂。在极性溶剂中得到的所有聚合物都表现出同时性的增加。讨论了聚合机理。
α-Methylvinyl methyl ether, ethyl ether, and isobutyl ether were polymerized under various polymerization conditions and the structure of the polymers was determined by 1H- and 13C-NMR spectroscopy. α-Methyl and β-methylene carbon spectra of poly(α-methylvinyl isobutyl ether) showed splitting and were analyzed by triad and tetrad sequences. β-Methylene carbon spectra of poly(α-methylvinyl ethyl ether) also showed splitting. When Eu(fod)3 was added, α-methyl and methoxy proton spectra in benzene of poly(α-methylvinyl methyl ether) showed splitting assigned to triad tacticities. All the polymers obtained in polar solvents exhibited an increase in syndiotacticity. The polymerization mechanism is discussed.