Acta Chimica Sinica ›› 2003, Vol. 61 ›› Issue (9): 1488-1491. Previous Articles     Next Articles

Original Articles

丙烯酸聚乙二醇酯-甲基丙烯酸共聚物对CaCO_3微粒形貌的调控

王芳;徐桂英;张志庆;肖莉   

  1. 山东大学
  • 发布日期:2003-09-15

Morphological Control of CaCO_3 Particles by a Poly (ethylene glycol) Acrylate-block-(methacrylic acid) Copolymer

Wang Fang;Xu Guiying;Zhang Zhiqing;Xiao Li   

  1. Key Laboratory for Colloid and Interface Chemistry of Education Ministry, Shandong University
  • Published:2003-09-15

Poly(ethylene glycol) acrylate-block-(methacrylic acid) copolymer (PEGA-PMAA) having double-hydro-philic groups was synthesized and characterized. The morphology of the CaCO_3 particles formed in the presence of PEGA-PMAA was investigated, which was compared with the CaCO_3 particles formed in Lhe presence of poly (ethylene glycol) acrylate (PEGA) having single-hydrophilic group. The results show that the morphology of CaCO_3 particles varies with the polymers presented. The size of the CaCO_3 particles controlled by PEGA is smaller than that in water. However, the size of the CaCO_3 particles controlled by PEGA-PMAA is much larger. Especially, the flower-shaped calcite with large length of about 7 μm is very interesting. This indicates that PEGA prevents the growth of the CaCO_3 particles, while PEGA-PMAA promotes the growth of the CaCO_3 particles.

Key words: PROPENOIC ACID ESTER, POLYMER, METHYLPROPENOIC ACID, CALCIUM CARBONATE, GROWTH

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