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Optical and Dielectric Anisotropy in Polyimide Nanocomposite Films Prepared from Soluble Poly(amic diethyl ester) Precursors
Author(s) -
Kim Y.,
Goh W.H.,
Chang T.,
Ha C.S.,
Ree M.
Publication year - 2004
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.200300546
Subject(s) - polyimide , materials science , dielectric , nanocomposite , anisotropy , composite number , composite material , prism , polymer chemistry , optics , layer (electronics) , optoelectronics , physics
Optical and dielectric anisotropy of the polyimide nanocomposite films prepared from soluble poly(amic‐diethyl ester) precursors has been studied using a prism coupling technique. The composite films showed nonlinear dependence of in‐plane and out‐of‐plane refractive indices (dielectric constants) on the composition. Consequently the in‐plane dielectric constant of the composite films was not much reduced owing to the still high in‐plane orientation of the rod‐like polyimide, leading to the quite high dielectric anisotropy.