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

上传者: 2021-03-15 10:55:11上传 PDF文件 294.54KB 热度 20次
The poly(urethane-imide) (PUI) which uses isophorone diisocyanate, dispersed red 19 (DR-19), and pyromellitic 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 C and 5% heat weight loss temperature of 296 C. The fluorescence spectra of PUI
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