波谱学杂志 ›› 1987, Vol. 4 ›› Issue (2): 131-135.

• 研究论文 • 上一篇    下一篇

13CNMR研究聚甲基丙烯酸锡酯的立构序列分布

陈庆民, 严晓虎, 徐种德, 韩哲文, 王源身   

  1. 南京大学化学系
  • 收稿日期:1986-10-12 修回日期:1986-11-24 出版日期:1987-06-05 发布日期:2018-01-22

A STUDY OF THE SEQUENCE DISTRIBUTION OF POLY (TIN METHACRYLATE)S BY 13C-NMR

Chen Qingmin, Yan Xiaohu, Xu Zhongde, Han Zhewean, Wang Yuanshen   

  1. Nanjing University
  • Received:1986-10-12 Revised:1986-11-24 Online:1987-06-05 Published:2018-01-22

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。

关键词: 聚甲基丙烯酸锡酯, 13C核磁共振, 立体规整度

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.

Key words: Pold(tin methacrylate)s, 13C-NMR, Tacticity