Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/41875
標題: Stable second-order NLO semi-IPN system based on bipyridine-containing polyimide and alkoxysilane dye
作者: Kuo, W.J.
鄭如忠
Chang, M.C.
Juang, T.Y.
Chen, C.P.
Chen, C.T.
Chang, H.L.
Jeng, R.J.
關鍵字: NLO
polyimides
interpenetrating network (IPN)
sol-gel reaction
atomic force microscopy (AFM)
aromatic tetracarboxylic dianhydrides
sol-gel materials
side-chain
temporal stability
nonlinear optics
epoxy-resins
polymers
chromophore
crystals
hybrids
期刊/報告no:: Polymers for Advanced Technologies, Volume 16, Issue 7, Page(s) 515-523.
摘要: An organosoluble polyimide based on bipyridyl moiety and an alkoxysilane dye have been developed for second-order non-linear optics (NLOs). This bipyridine-containing polyimide exhibits a glass transition temperature of 254 degrees C and a degradation temperature of 400 degrees C. An NLO-active semi-interpenetrating network (IPN) system was prepared by blending the polyimide with the alkoxysilane dye via in situ sol-gel process of alkoxysilane. The selection of this bipyridine-containing polyimide as the polymeric matrices provides improved solubility and thermal stability, and most importantly enhanced intermolecular interactions. No aggregation of the NLO chromophores in the polyimide matrices was observed through morphology and NLO studies. Under the limitation of chromophore degradation at elevated temperatures, the pristine poled/cured alkoxysilane dye exhibits poorer long-term stability. By introducing the polyimide upon a silica network by the semi-IPN system, randomization of the oriented chromophores can be effectively suppressed. Using in situ contact poling, the r(33) coefficients of 2.2-17.0 pm/V were obtained for the optically clear semi-IPN NLO materials. Excellent temporal stability (100 degrees C) was also achieved for these semi-IPN materials. Copyright (c) 2005 John Wiley & Sons, Ltd.
URI: http://hdl.handle.net/11455/41875
ISSN: 1042-7147
文章連結: http://dx.doi.org/10.1002/pat.619
Appears in Collections:化學工程學系所

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