| 用13CNMR研究聚甲基丙烯酸锡酯的立构序列分布 |
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| 引用本文： | 陈庆民,严晓虎,徐种德,韩哲文,王源身.用13CNMR研究聚甲基丙烯酸锡酯的立构序列分布[J].波谱学杂志,1987,4(2):131-135. |
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| 作者姓名： | 陈庆民 严晓虎 徐种德 韩哲文 王源身 |
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| 作者单位： | 南京大学化学系 |
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| 摘 要： | 本文测定了自由基型溶液聚合的聚甲基丙烯酸三甲基锡酯(PTMTM),聚甲基丙烯酸三乙基锡酯(PTETM)和聚甲基丙烯酸三丁基锡酯(PTBTM)的13C-NMR谱,对其C-2谱扩展分峰,计算立构序列,从定量数据表明,聚合物样品的空间立构富于或稍富于间规立构,随取代基的体积增大而趋于无规分布,作者认为受空间位阻效应和分子内或分子间形成配位键的影响。
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| 关 键 词： | 聚甲基丙烯酸锡酯 13C核磁共振 立体规整度 |
| 收稿时间： | 1986-10-12 |
A STUDY OF THE SEQUENCE DISTRIBUTION OF POLY (TIN METHACRYLATE)S BY ~(13)C-NMR |
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| Chen Qingmin Yan Xiaohu Xu Zhongde Han Zhewean and Wang Yuanshen.A STUDY OF THE SEQUENCE DISTRIBUTION OF POLY (TIN METHACRYLATE)S BY ~(13)C-NMR[J].Chinese Journal of Magnetic Resonance,1987,4(2):131-135. |
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| Authors: | Chen Qingmin Yan Xiaohu Xu Zhongde Han Zhewean and Wang Yuanshen |
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| Institution: | Nanjing University |
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| Abstract: | The 13C-NMR spectra of poly ( trimethyl tin methacrylate ) , ( PTMTM ), poly ( triethyl tin methacrylate), ( PTETM ) ,and poly ( tri-n-butyl tin methacrylate ) , ( PTBTM ) , polymerized with radical initator in the solution were measured. Resoluion of the C-2 peaks was made by computer. The quantitative results indicated that the sequence distribution of the polymers was syndiotactic-rich or slightly syndiotactic-rich. This syndiotacticity decreases with increase in volume of substitute, which could be influenced by the steric effect and the intra-or intermolecular coordination bond. |
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| Keywords: | Pold(tin methacrylate)s ~(13)C-NMR Tacticity |
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