Dielectric property of polyimide/barium titanate composites and its influence factors (II)

2008, Volume 2, Issue 4

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Frontiers of Chemical Science and Engineering >> 2008, Volume 2, Issue 4 doi: 10.1007/s11705-008-0078-0

Dielectric property of polyimide/barium titanate composites and its influence factors (II)

1.Institute of Polymer Science, Key Laboratory of Macromolecular Synthesis and Functionalization, Ministry of Education, Zhejiang University；Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Zhejiang Normal University; 2.; 3.Institute of Polymer Science, Key Laboratory of Macromolecular Synthesis and Functionalization, Ministry of Education, Zhejiang University;

Available online: 2008-12-05

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Abstract

Using poly(amic acid) (PAA) as a precursor followed by thermal imidization, the polyimide/barium titanate composite films were successfully prepared by a direct mixing method and in situ process. The influence of processing factors, such as particle size, distribution mode and polymerization method on dielectric properties was studied. Results revealed that the dielectric constant (?) of the composite film increased by using bigger fillers or employing in situ polymerization and bimodal distribution. When the composite film containing 50 Vol-% of BaTiO with size in 100 nm was prepared via in situ process, its dielectric constant reached 45 at 10 kHz.

Keywords

thermal imidization ; dielectric constant ; particle ; precursor ; titanate composite

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