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Chinese Journal of Polymer Science

, Volume 30, Issue 1, pp 26–35 | Cite as

Dispersion stability and rheological behavior of suspensions of polystyrene coated fumed silica particles in polystyrene solutions

  • Xian-ze Yin
  • Ye-qiang Tan
  • Yi-hu Song (宋义虎)Email author
  • Qiang Zheng
Article

Abstract

Polystyrene coated silica (SiO2@PS) core-shell composite particles with averaged diameter of about 290 nm were prepared by in situ emulsion polymerization of styrene on the surface of γ-methacryloxypropyltrimethoxysilane grafted SiO2 nanoparticles of 20–50 nm in diameter. Rheological behavior and dispersion stability of SiO2@PS suspension in 10 wt% PS solution were compared with suspensions of untreated SiO2 and silane modified SiO2 nanoparticles. Suspensions of the untreated and the silane modified SiO2 exhibited obvious shear thinning. The SiO2@PS suspension exhibits shear viscosity considerably smaller than suspensions of untreated and silane modified SiO2 at low shear rates. Transmission electron microscopy showed that the composite particles can uniformly and stably disperse in PS solution compared to other suspensions, implying that the PS shell can effectively enhance the particle compatibility with PS macromolecules in solution.

Keywords

Fumed SiO2 Polystyrene Composite particles Suspension Steady rheology 

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Copyright information

© Chinese Chemical Society, Institute of Chemistry, Chinese Academy of Sciences and Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Xian-ze Yin
    • 1
  • Ye-qiang Tan
    • 1
  • Yi-hu Song (宋义虎)
    • 1
    • 2
    Email author
  • Qiang Zheng
    • 1
    • 2
  1. 1.Key Laboratory of Macromolecular Synthesis and Functionalization of Ministry of EducationZhejiang UniversityHangzhouChina
  2. 2.Department of Polymer Science and EngineeringZhejiang UniversityHangzhouChina

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