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›› 2002, Vol. 2 ›› Issue (6): 0-0.

• 6 •    

苯乙烯接枝聚合改性的重质碳酸钙表面特征分析及形成机理

毋伟，卢寿慈, 陈建峰，邵磊   

  1. 1. 北京化工大学教育部超重力工程研究中心，北京 100029； 2. 北京科技大学土木环境工程学院，北京 100083
  • 出版日期:2002-12-20 发布日期:2002-12-20

Surface Characteristics of Heavy Calcium Carbonate Modified by Polymer Grafting

WU Wei1, LU Shou-ci2, CHEN Jian-feng1, SHAO Lei1   

  1. 1. Res. Center for High Gravity Eng. & Technol., Ministry of Edu., Beijing Univ. Chem. Technol., Beijing 100029; 2. Civil and Environmental Engineering School, Univ. Sci. and Technol. Beijing, Beijing 100083, China
  • Online:2002-12-20 Published:2002-12-20

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被引次数

44

摘要： 运用傅立叶变换红外光谱仪、X射线光电子能谱测定仪等检测手段，对比研究了在机械力、热、化学等联合作用下，苯乙烯与重质碳酸钙表面作用后，改性重质碳酸钙的表面性质及其形成机理，认为改性后在重质碳酸钙表面与苯乙烯聚合生成的聚苯乙烯之间形成C?O?C键，重质碳酸钙表面除存在聚苯乙烯的接枝外，还包括聚苯乙烯的多层化学吸附和包敷，重质碳酸钙与苯乙烯之间主要发生了自由基聚合反应，初步确立了改性前后碳酸钙表面的键合状况.

关键词: 重质碳酸钙, 苯乙烯, 表面性质, 聚合

Abstract: A new process of polymer grafting modification of CaCO3 is proposed, which combines the action of mechanical force, thermal and chemical effects. The modification time is reduced greatly and the modification effect is improved. Infrared spectrum (IR), gel permeation chromatography (GPC), X photoelectron spectrum (XPS) and thermogravimetry (TG) analyses are employed to characterize the modified surface of heavy calcium carbonate by styrene grafting. It is proven that chemically absorbed multi-layer polystyrene exists on the surface of the modified particles apart from grafted polystyrene. The primary surface characteristics of heavy calcium carbonate are deduced based on physico-chemical analyses. Radical polymerization is regarded as the primary modification mechanism.

Key words: heavy calcium carbonate, styrene, surface characteristic, polymerization

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