【摘要】 利用溶胶-凝胶法将硅烷染料、含硅氧烷的非线性聚氨酯与正硅酸乙酯(TEOS)共水解,缩合制备了新型聚氨酯噻唑(PUT/SiO2)纳米复合材料,并用IR、SEM、TEM、UV-Vis、DSC和TGA对其结构和性能进行了表征.结果显示,材料中聚氨酯与SiO2以共价键相连,没有发生相分离,且其中非线性较好的噻唑生色团含量和材料的玻璃化转变温度(Tg)、热分解温度(Td)都较纯非线性光学材料(NLO)聚氨酯(PU)有显著增加,可以用来制备性能优良的二阶非线性光学器件.更多还原

【Abstract】 Novel polyurethane thiazole(PUT)/SiO2 nanocomposite material was prepared by hydrolysis and condensation of alkoxysilane dye, polyurethane (PU) containing alkoxysilane, and tetraethoxysiliane (TEOS) together using the sol-gel process. The structure and properties were characterized by IR, SEM, TEM, UV-Vis, and DSC-TGA measurements. The result showed that the organic phase connected with the inorganic phase by covalent bond without separation of phase in the material, and the content of thiazole chromophore with good nonlinearity in the material, the glassy temperature, and decomposed temperature of the material increase remarkably; thus, the material can be used to manufacture second-order nonlinear apparatus having fine performance.更多还原