Browsing by Author "LIAO, CL"

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NONLINEAR OPTICAL PROPERTIES AND POLING DYNAMICS OF A SIDE-CHAIN POLYIMIDE DISPERSE-RED DYE FILM - INSITU OPTICAL 2ND-HARMONIC GENERATION STUDY
(1994-01-01)
HUANG, JY
;
LIAO, CL
;
CHANG, CJ
;
WHANG, WT
;
交大名義發表
NONLINEAR OPTICAL PROPERTIES AND POLING DYNAMICS OF A SIDE-CHAIN POLYIMIDE DISPERSE-RED DYE FILM - INSITU OPTICAL 2ND-HARMONIC GENERATION STUDY
(1994-01-01)
HUANG, JY
;
LIAO, CL
;
CHANG, CJ
;
WHANG, WT
;
交大名義發表
THE EFFECT OF PREPARATION PROCESS OF PMDA-ODA-DR1 POLYIMIDE ON ITS 2ND-HARMONIC GENERATION CHARACTERISTICS
(1995-06-20)
CHANG, CJ
;
WHANG, WT
;
HUANG, JY
;
LIAO, CL
;
LIU, JM
In situ second harmonic generation (SHG) observation of PMDA-ODA-DR1 polyimide films prepared by different preparative procedures were studied to understand the effects of the residual acid and the imidization byproduct and the extent of imidization on the SHG characteristics of the PMDA-ODA-DR1 polyimides. PMDA-ODA-DR1 polyimides with or without removal of salt were also investigated to study the influence of remaining triethyl hydrogen ammonium chloride salt on the SHG characteristics and reliability of the polymers. A blue shift in the UV/vis spectrum during poling was observed for the low-temperature-baked film, but did not occur for the high-temperature-baked film. Both high-temperature imidization and removal of the byproduct organic salt did not only improve the poling efficiency of PMDA-ODA-DR1 polyimide as a SHG material, but also slowed down the relaxation of the film and made the film more reliable. (C) 1995 John Wiley and Sons, Inc.
THERMAL-STABILITY OF 2ND-ORDER NONLINEARITY IN POLED POLYMERIC FILMS
(1995-01-01)
HUANG, JY
;
LIAO, CL
;
WHANG, WT
;
CHANG, CJ
;
材料科學與工程學系
The thermal stability of the poled polar order of nonlinear optical (NLO) chromophores covalently appended to the main chain of polymeric films was studied by measuring the generated optical second-harmonic signal over a wide range of temperatures. Our results provide insight into the relationship of the thermal stability of the poled order with chemical bonding and elastic interaction of the NLO chromophores in polymeric matrices.