以不同比例的重氮盐分别与聚双(N-羟基己氧基咔唑)磷腈(P-1)进行偶合反应,得到了一组以咔唑和对硝基偶氮咔唑为官能团的双功能型光折变聚合物P-2,P-3和P-4,用31 P NMR,1 H NMR,IR,TG,DSC和UV-Vis光谱对该组聚合物进行表征和分析,以325n...以不同比例的重氮盐分别与聚双(N-羟基己氧基咔唑)磷腈(P-1)进行偶合反应,得到了一组以咔唑和对硝基偶氮咔唑为官能团的双功能型光折变聚合物P-2,P-3和P-4,用31 P NMR,1 H NMR,IR,TG,DSC和UV-Vis光谱对该组聚合物进行表征和分析,以325nm的激发波长对P-1,P-2,P-3和P-4进行固体荧光稳态发射光谱的测试。结果表明,该组聚合物具有良好的热稳定性(Td≈300℃)和较低的玻璃化温度(Tg≈30～40℃),P-1具有良好的荧光活性,硝基的引入,导致P-2,P-3和P-4的荧光发生不同程度的猝灭,咔唑与对硝基偶氮咔唑的数量及其空间分布排列的都会对其荧光性能产生影响。展开更多
Carbazole-based bi-functional photorefractive polyacrylates were prepared via free radical polymerization and post-azo-coupling reaction. The structure of polymers was characterized by Fourier transform infrared spect...Carbazole-based bi-functional photorefractive polyacrylates were prepared via free radical polymerization and post-azo-coupling reaction. The structure of polymers was characterized by Fourier transform infrared spectroscopy （FTIR） and proton nuclear magnetic resonance （^1H-NMR） spectroscopy. The differential scanning calorimetry （DSC） and the thermal gravimetric analysis （TGA） were used to characterize the thermal property of polymers. The results indicate that though the glass transition temperature （Tg） of polymers increases with increasing the ratio of NLO groups, the polymers with different ratios of NLO groups still all show low glass transition temperatures around 60 ℃, and good thermal stability, which are favorable to the practical application of these polymers. The gel permeation chromatographic （GPC） result indicates that these polymers all have high-molecular-weight which is favorable to the long term stability of the material. Further, these polymers have good solubility in chloroform solvent, and the solutions can easily be fabricated into optically transparent films. Gain coefficients of 75 cm^-1, 185 cm^-1 and 66 cm^-1 can be observed at zero external electric field without any addition agent or pre-poling for polymers P-2, P-3 and P-4 respectively. The different contents of NLO groups result in the different properties of polymers P-2, P-3 and P-4.展开更多
文摘以不同比例的重氮盐分别与聚双(N-羟基己氧基咔唑)磷腈(P-1)进行偶合反应,得到了一组以咔唑和对硝基偶氮咔唑为官能团的双功能型光折变聚合物P-2,P-3和P-4,用31 P NMR,1 H NMR,IR,TG,DSC和UV-Vis光谱对该组聚合物进行表征和分析,以325nm的激发波长对P-1,P-2,P-3和P-4进行固体荧光稳态发射光谱的测试。结果表明,该组聚合物具有良好的热稳定性(Td≈300℃)和较低的玻璃化温度(Tg≈30～40℃),P-1具有良好的荧光活性,硝基的引入,导致P-2,P-3和P-4的荧光发生不同程度的猝灭,咔唑与对硝基偶氮咔唑的数量及其空间分布排列的都会对其荧光性能产生影响。
基金financially supported by the Innovation Foundation of China Academy of Engineering Physics(No.CX08201205)the Development Foundation of China Academy of Engineering Physics(No.2013A0302016)
文摘Carbazole-based bi-functional photorefractive polyacrylates were prepared via free radical polymerization and post-azo-coupling reaction. The structure of polymers was characterized by Fourier transform infrared spectroscopy （FTIR） and proton nuclear magnetic resonance （^1H-NMR） spectroscopy. The differential scanning calorimetry （DSC） and the thermal gravimetric analysis （TGA） were used to characterize the thermal property of polymers. The results indicate that though the glass transition temperature （Tg） of polymers increases with increasing the ratio of NLO groups, the polymers with different ratios of NLO groups still all show low glass transition temperatures around 60 ℃, and good thermal stability, which are favorable to the practical application of these polymers. The gel permeation chromatographic （GPC） result indicates that these polymers all have high-molecular-weight which is favorable to the long term stability of the material. Further, these polymers have good solubility in chloroform solvent, and the solutions can easily be fabricated into optically transparent films. Gain coefficients of 75 cm^-1, 185 cm^-1 and 66 cm^-1 can be observed at zero external electric field without any addition agent or pre-poling for polymers P-2, P-3 and P-4 respectively. The different contents of NLO groups result in the different properties of polymers P-2, P-3 and P-4.
