Synthesis and third-order nonlinear optical property of poly(urethane-imide)  

作　　者：朱复红 邱凤仙 杨冬亚 张蓉仙 

机构地区：[1]School of Chemistry and Chemical Engineering,Jiangsu University

出　　处：《Chinese Optics Letters》2009年第6期527-529,共3页中国光学快报（英文版）

基　　金：supported by the Natural Science Foundation of Jiangsu Province (No.BK2008247);the China Postdoctoral Science Foundation (No.20070420973);the Jiangsu Planned Projects for Postdoctoral Research Funds (NO.0602037B);the Jiangsu Provincial Key Laboratory for Science and Technology of Photon Manufacturing;the Natural Science Foundation of Jiangsu Educational Department (No.08KJB150004)

摘　　要：The poly（urethane-imide） （PUI） which uses isophorone diisocyanate, dispersed red 19 （DR-19）, and py- romellitic dianhydride is synthesized. The PUI is characterized by Fourier transform infrared （FT-IR） spectroscopy, differential scanning calorimetry （DSC）, and thermogravimetric analysis （TGA）. The results of DSC and TGA indicate that the PUI exhibits high thermal stability up to its glass-transition temperature of 209 ℃ and 5° heat weight loss temperature of 296℃. The fluorescence spectra of PUI and DR-19 are measured, showing that the fluorescence effect of PUI is very similar to that of DR-19 except for the light decrease of fluorescence intensity, which indicates that the fluorescence effect of PUI is generated by the azobenzene groups in its macromolecular chains. The maximum molar absorption coefficient, absorp- tion wavelength, and chromophores density are measured and used to calculate the third-order nonlinear optical coefficient X（3） to be 3.96×10^-13 esu. The nonlinear refractive index coefficient and molecular hyperpolarizabilitv of PUI are also obtained. PUI is oroved to have an excellent ootical Performance.The poly（urethane-imide） （PUI） which uses isophorone diisocyanate, dispersed red 19 （DR-19）, and py- romellitic dianhydride is synthesized. The PUI is characterized by Fourier transform infrared （FT-IR） spectroscopy, differential scanning calorimetry （DSC）, and thermogravimetric analysis （TGA）. The results of DSC and TGA indicate that the PUI exhibits high thermal stability up to its glass-transition temperature of 209 ℃ and 5° heat weight loss temperature of 296℃. The fluorescence spectra of PUI and DR-19 are measured, showing that the fluorescence effect of PUI is very similar to that of DR-19 except for the light decrease of fluorescence intensity, which indicates that the fluorescence effect of PUI is generated by the azobenzene groups in its macromolecular chains. The maximum molar absorption coefficient, absorp- tion wavelength, and chromophores density are measured and used to calculate the third-order nonlinear optical coefficient X（3） to be 3.96×10^-13 esu. The nonlinear refractive index coefficient and molecular hyperpolarizabilitv of PUI are also obtained. PUI is oroved to have an excellent ootical Performance.

关 键 词：Absorption CHROMOPHORES Fluorescence Glass transition Infrared spectroscopy Refractive index Synthesis (chemical) Thermogravimetric analysis 

分 类 号：O631.3[理学—高分子化学]