高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (11): 1498.

• 研究论文 • 上一篇    下一篇

研究硅酸聚合反应的新途经

安永林, 李守贵, 徐如人, 唐敖庆   

  1. 吉林大学化学系, 长春 130023
  • 收稿日期:1993-04-09 修回日期:1993-06-10 出版日期:1993-11-24 发布日期:1993-11-24
  • 通讯作者: 李守贵.
  • 作者简介:安永林, 男, 29岁, 博士研究生.
  • 基金资助:

    国家自然科学基金

A New Approach to Investigation of Polymerization of Silicic Acid

AN Yong-Lin, LI Shou-Gui, XU Ru-Ren, TANG Ao-Qing   

  1. Department of Chemistry, Jilin University, Changchun, 130023
  • Received:1993-04-09 Revised:1993-06-10 Online:1993-11-24 Published:1993-11-24

摘要: 用高分子反应统计理论研究了硅酸聚合反应.利用三甲基硅烷化-气相色谱法跟踪测定了聚合反应过程中各低聚态硅酸的含量变化,得到了分子数量分数分布.该分布符合含有内环化因子校正的A1型缩聚反应统计理论,内环化反应是硅酸聚合反应的重要特征.

关键词: 硅酸, 聚合, 内环化, 高分子反应统计理论

Abstract: In this paper, a new approach to the study of polymerization of silicic acid in aqueous solution is described in terms of the statistical theory of polymeric reaction involving intramolecular cyclization.Trimethylsilylation-gas chromatography technique is applied to the characterization of the polymeric reaction.The number fraction distributions of polymeric molecules are obtained in various polymeric systems with [SiO2]=0.05-0.5 mol/L, pH=1-3.The experimental results show that the polymeric behavior of silicic acid at the early stage of polymerization is in agreement with that predicted by the statistical theory for A4 type crosslinking reaction involving intramolecular cyclization, and intramolecular cyclization is the characteristics of the polymeric reaction.

Key words: Silicic acid, Polymerization, Intramolecular cyclization, Statistical theroy of polymeric reaction

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