| 偏氟乙烯和四氟乙烯共聚反应中链自由基的反应性 |
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| 引用本文： | 周仁沬,伍文超,鲁玫丽,朱振豪.偏氟乙烯和四氟乙烯共聚反应中链自由基的反应性[J].高分子学报,1987,0(1):56-62. |
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| 作者姓名： | 周仁沬 伍文超 鲁玫丽 朱振豪 |
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| 作者单位： | 中国科学院上海有机化学研究所 上海
(周仁沬，伍文超，鲁玫丽)，中国科学院上海有机化学研究所 上海(朱振豪) |
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| 摘 要： | 应用高分辨率核磁共振仪研究了一系列不同组成的偏氟乙烯和四氟乙烯共聚物。指出,共振核—CF_2—的化学位移不仅受第一、二邻位基团的影响,也受第三邻位的影响。偏氟乙烯和四氟乙烯以无规共聚进行反应,在共聚反应中的链自由基﹏CF_2·或﹏CH_2·容易增长于CH_2=CF_2的CH_2端,而链自由基﹏CH_2·在偏氟乙烯和四氟乙烯共聚反应中的增长倾向于四氟乙烯。
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| 关 键 词： | 偏氟乙烯 四氟乙烯 共聚反应 链自由基 核磁共振波谱 |
| 收稿时间： | 1984-11-24 |
THE REACTIVITY OF THE SEQUENCE RADICAL IN THE COPOLYMERIZATION OF VINYLLDENEFLURIDE (VDF) AND TETRAFLUOROETHYLENE (TFE) |
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| ZHOU Ren-mo,WU Wen-chao,LU Mei-li,ZU Zhen-hao.THE REACTIVITY OF THE SEQUENCE RADICAL IN THE COPOLYMERIZATION OF VINYLLDENEFLURIDE (VDF) AND TETRAFLUOROETHYLENE (TFE)[J].Acta Polymerica Sinica,1987,0(1):56-62. |
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| Authors: | ZHOU Ren-mo WU Wen-chao LU Mei-li ZU Zhen-hao |
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| Institution: | Shanghai Institute of Organic Chemistry; Academia Sinica; Shanghai |
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| Abstract: | A series of VDF-TFE copolymers of different composition were studied by 56.4 MHz and 188.2 MHz high resolution 19F-NMR spectrometer. These results indicated that the chemical shifts of central -CF2- group are not only affected by the first and the second neighboring groups, but also by the third neighboring group. VDF and TFE seemed to copolymerize in a random way. The growing polymer chain radical -CF2. or-CH2 . is strongly favored over the CH2 end of CH2 = CF2, and the growth of the chain radical-CH2. trended towards CF2 = CF2 in the copolymerization of VDF and TFE. |
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| Keywords: | Vinylidenefluride Tetrafluoroethylene Polymer chain radical Fluoride nuclear magnetic resonance spectrometer |
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