Articles
  • Synthesis and characterization of a novel polyimide/TiO2 nanocomposite for solution processable high k dielectric
  • Young Im Yua, Mi Hye Yia,* and Taek Ahnb,*
  • a Information and Electronics Polymer Research Center, Korea Research Institute of Chemical Technology, 100 Jang-dong, Yuseong-gu, Daejeon 305-600, Korea b Department of Chemistry, Kyungsung University, 314-79 Daeyeon-dong, Nam-gu, Busan 608-736, Korea
Abstract
The polyimide/TiO2 nanocomposite thin films have been successfully synthesized. The surfaces of TiO2 particles were chemically modified with a γ-glycidyloxypropyltrimethoxysilane (GPTS) functional group to enhance the compatibility with polymeric matrix and to avoid the aggregation of particles. The dispersion of surface modified TiO2 in polyimide film was greatly improved and it was confirmed by the scanning electron microscope (SEM) analysis showing that well dispersed nanosized TiO2 particles. Compare to thepolyimide/unmodified TiO2 (T5) nanocomposite film, the size of the TiO2 particles in the polyimide/surface modified TiO2 (T5-GPTS) film was substantially reduced due to the increased solubility of surface modified TiO2 (T5-GPTS). The mechanical properties, thermal stabilities and dielectric properties of polyimide/surface modified TiO2 (T5-GPTS) nanocomposite films were also systematically investigated.

Keywords: Polyimide, TiO2, Nanocomposite, Surface modification.

This Article

  • 2012; 13(S2): 202-205

    Published on Nov 30, 2012