Chem. J. Chinese Universities ›› 1993, Vol. 14 ›› Issue (11): 1498.

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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

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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