POLY 153 |
| A series of thermally stable organic-inorganic second-order nonlinear optical composites via sequential self-repetitive reaction (SSRR) and sol-gel process have been developed. This SSRR is based on carbodiimide (CDI) chemistry. The organic-inorganic composites were first prepared by mixing the prepolymer of phenyltriethoxysilane and poly(N-acylurea) in different weight ratios (10/90, 30/70, 50/50, 70/30, 90/10 wt%) in DMF. Moreover, the moderate glass transition temperature (Tg) characteristic of poly(N-acylurea) allows the NLO-active polymer to exhibit high poling efficiency. After in-situ poling and curing process, the Tgs of the composites were elevated to the temperatures much higher than that of the pristine organic sample. Electro-optical coefficients, r33 of about 3.9 ~ 13 pm/V at 830 nm were obtained. Excellent temporal stability (100 oC) and waveguide optical losses (3.1-4.2 dB/cm at 830 nm) were also achieved for these composites. |
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General Papers: Functional Materials
6:00 PM-8:00 PM, Sunday, August 19, 2007 BCEC -- Exhibit Hall - B2, Poster
Division of Polymer Chemistry |