Modification of larger size CaCO3 particle with polystyrene via in situ emulsion polymerisation

作者：Zhang, F. -A.^*; Zhao, L.; Yu, C. -L.; Wei, C.

来源：Plastics Rubber and Composites, 2010, 39(2): 74-78.

DOI：10.1179/174328910X12608851832533

• Polymer composite
• CaCO3
• Styrene
• Modification
• Emulsion polymerisation

An industrial calcium carbonate (CaCO3) filler of large particle size was modified with polystyrene (PS) by in situ emulsion polymerisation of styrene. The structure, morphology and thermal stability of the PS/CaCO3 composite were characterised by Fourier transform infrared spectrograph, scanning electron microscope and thermogravimetric analysis, respectively. The effects of St/CaCO3 ratio and particle size of CaCO3 on the encapsulation ratio of the CaCO3 and the viscosity of the composite in organic solvent were investigated to obtain maximal modification. The results showed that PS had covered the CaCO3 particles, which changed the surface of CaCO3 particles from hydrophilic to hydrophobic. The maximal decomposition temperature of the extracted PS/CaCO3 composite was increased by 17 degrees C in comparison to pure PS. The viscosity of CaCO3 particles in organic solvent decreased greatly, indicating that the effect of modification was very significant. The large size of the CaCO3 particle exhibited high encapsulation ratio.

• 出版日期2010-3
• 单位桂林理工大学