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Preparation and characterization of high refractive index thin films of TiO 2 /epoxy resin nanocomposites
Author(s) -
Guan Cheng,
Lü ChangLi,
Liu YiFei,
Yang Bai
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.23947
Subject(s) - materials science , refractive index , nanocomposite , amorphous solid , triethoxysilane , epoxy , high refractive index polymer , sol gel , composite material , fourier transform infrared spectroscopy , polymer , thin film , hybrid material , chemical engineering , polymer chemistry , nanotechnology , optoelectronics , organic chemistry , chemistry , engineering
By using sol–gel method, amorphous titania was introduced into epoxy matrix to prepare a series of high refractive index TiO 2 /epoxy resin nanocomposite films. To increase the refractive index of the hybrid films, triethoxysilane‐capped trimercaptothioethylamine (TCTMTEA), a new kind of high refractive index coupling agent was synthesized from trimercaptothioethylamine (TMTEA). In the experiment, TCTMTEA acted as the solidification agent together with TMTEA except being used as the coupling agent. The hybrid films have been characterized via FTIR, AFM, DSC, TGA, etc. The experimental results showed that the amorphous TiO 2 had been dispersed uniformly in the organic polymer matrix with the size smaller than 100 nm in each sample. More importantly, the refractive index of this kind of materials can be continuously adjusted from 1.61 to 1.797 with the content of TiO 2 increasing from 0% to 65% in mass, and the continuously adjusted refractive index is very important for the applications in optical antirefractive films. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 1631–1636, 2006