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Journal of Sol-Gel Science and Technology

, Volume 37, Issue 1, pp 39–47 | Cite as

Interaction and Microstructure of Polyurethane/Silica Hybrid Films Prepared by Sol-Gel Process

  • Yong-Chun Chen
  • Shu-Xue Zhou
  • Hai-Hua Yang
  • Li-Min Wu
Article

Abstract

The polyester/silica hybrid resins and their hybrid polyurethanes were prepared via in situ (IS) or blending (BL) method using different silica sols. The effects of preparation methods, silica type and content on the interaction and microstructure of polymer/silica hybrid materials were investigated by FTIR, viscosity measurement, TGA, DMA and SAXS, respectively. It was found that both IS and BL methods formed agglomerates of silica-rich phases and primary silica-rich phases in the hybrid films, but the former caused stronger interaction between silica and polymer than the latter, resulting in much bigger agglomerates and compacter structure. The ethoxy group at silica was favorable for enhancing the interaction between silica phase and polymer, even between silica phases as well. The interaction between silica phase and polymer caused increasing viscosity, modulus and Tg, while the interaction between silica phases themselves increased the extent of micro-phase separation, especially for the hybrid films prepared by IS method.

Keywords

polyurethane silica hybrid films interaction microstructure 

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Copyright information

© Springer Science + Business Media, Inc. 2006

Authors and Affiliations

  • Yong-Chun Chen
    • 1
  • Shu-Xue Zhou
    • 1
  • Hai-Hua Yang
    • 1
  • Li-Min Wu
    • 1
  1. 1.Department of Materials Science and the Advanced Coatings Research Center of China Educational MinistryFudan UniversityShanghaiP.R. China

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