Anchoring both ends of the chromophore in the side-chain nonlinear optical polymer for improved thermal stability

1993 ◽  
Author(s):  
Yongqiang Shi ◽  
Peter M. Ranon ◽  
William H. Steier ◽  
Chengzeng Xu ◽  
Bo Wu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Nonlinear Optical ◽  
Side Chain ◽  
Optical Polymer ◽  
Nonlinear Optical Polymer

Investigation of Dipolar Relaxation Processes in a Side-Chain Nonlinear Optical Polymer

1996 ◽  
Vol 446 ◽  
Author(s):  
Z. -Y. Cheng ◽  
R. S. Katiyar ◽  
S. Bauer ◽  
S. Bauer-Gogonea
Keyword(s):  
Glass Transition ◽  
Dielectric Spectroscopy ◽  
Nonlinear Optical ◽  
Side Chain ◽  
Relaxation Processes ◽  
Dipolar Relaxation ◽  
Depolarization Current ◽  
Chain Polymer ◽  
Optical Polymer ◽  
Nonlinear Optical Polymer

AbstractAmorphous thin films of a typical side-chain nonlinear optical polymer were investigated by means of dielectric spectroscopy and thermally stimulated depolarization current (TSDC) within the temperature range -40°C to 230°C. Three distinct relaxation processes, labelled α, β and γ were observed. The α-relaxation, associated with the glass transition, is well described by the Vogel-Fulcher relation, while the sub glass transition β and γ-relaxation follow Arrhenius relations. The advantage of TSDC over dielectric spectroscopy is demonstrated for the investigation of the weak β-relaxation in the side-chain polymer. Furthermore, the β -relaxation is responsible for the initial, fast decay of the electro-optical response of the side-chain polymer at room temperature.

Evidence Of Photo-Oxidation In Photobleaching Process Of Nonlinear Optical Polymer

1995 ◽  
Vol 413 ◽  
Author(s):  
M. H. Lee ◽  
H. J. Lee ◽  
S. G. Han ◽  
H. -Y. Kim ◽  
Y. H. Won
Keyword(s):  
Nonlinear Optical ◽  
Side Chain ◽  
Conformational Transformation ◽  
Photo Degradation ◽  
Photo Oxidation ◽  
Optical Polymer ◽  
Nonlinear Optical Polymers ◽  
Nonlinear Optical Chromophores ◽  
Optical Chromophores ◽  
Nonlinear Optical Polymer

ABSTRACTThe photobleaching mechanism of nonlinear optical polymers has been investigated; the PMMA based polymers with nonlinear optical chromophores, 4-dimethylamino-4'-nitro-stilbene (DANS), 4-dimethylamino-4'-hexylsulfone-stilbene (DASS), and 4'-(2-hexyloxyethyl) ethyl amino-4-nitro azobenzene (DR-16). The photobleaching was carried out using near-UV lines. FTIR spectra and UV-VIS absorption spectra were obtained after each photobleaching. Refractive indices were measured in the photobleaching processes. The results suggest that the photobleaching mechanism of two PMMA based side-chain polymers with DANS and DASS chromophores results from the photo-oxidation and that of the PMMA based host-guest polymer with DR-16 chromophore results from the combination of the photo-degradation and the trans-cis conformational transformation.

Photoconductivity in a Photocrosslinkable Second Order Nonlinear Optical Polymer

1992 ◽  
Author(s):  
L. Li ◽  
J. Y. Lee ◽  
Y. Yang ◽  
J. Kumar ◽  
S. K. Tripathy
Keyword(s):  
Nonlinear Optical ◽  
Second Order ◽  
Optical Polymer ◽  
Nonlinear Optical Polymer

Multi-Functional Device Applications of Nonlinear Optical Polymer Materials.

1989 ◽  
Vol 175 ◽  
Author(s):  
R. Lytel ◽  
G.F. Lipscomb
Keyword(s):  
Nonlinear Optical ◽  
Polymer Materials ◽  
Functional Roles ◽  
Optical Polymer ◽  
Field Operation ◽  
Electro Optic ◽  
Recent Developments ◽  
Device Applications ◽  
Nonlinear Optical Polymer ◽  
Practical Field

AbstractRecent developments in the application of electro-optic polymer materials to perform multi-functional roles in integrated optic device applications are summarized and future requirements for practical field operation are discussed.

Study on the Preparation and Properties of the Nonlinear Optical Polymer Containing Tricyanofuran Units

2011 ◽  
Vol 31 (1) ◽  
pp. 0131004
Author(s):  
韩莉坤 Han Likun ◽  
蒋亚东 Jiang Yadong ◽  
李元勋 Li Yuanxun
Keyword(s):  
Nonlinear Optical ◽  
Optical Polymer ◽  
Nonlinear Optical Polymer
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