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Preparation and characterization of novel transparent Eu(AA) _3-polyurethane acrylate copolymeric materials

机译:新型透明Eu(AA)_3-聚氨酯丙烯酸酯共聚材料的制备与表征

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摘要

The rare earth (RE) salts Eu(AA) _3 (AA: acrylic acid group) and the macromonomers of polyurethane acrylate (MPUA) containing vinyl groups at the end of the chain are prepared for achieving a novel transparent Eu(AA) _3-polyurethane acrylate (Eu-PUA) materials by copolymerization. The structure and properties of the Eu(AA) _3 and the Eu-PUA have been systematically characterized by infrared spectroscopy (FTIR), proton and carbon nuclear magnetic resonance (~1H-NMR, 13C-NMR), thermogravimetric analysis (TGA), dynamic mechanical analysis (DMA), and fluorescence spectrophotometer. It is proved that the Eu(AA) _3 have been successfully bonded onto the molecular chains of the polyurethane acrylate and the glass transition temperature (T _g) of the polyurethane acrylate increases at the presence of Eu(AA) _3. In addition, the Eu-PUA materials show favorable thermal stability and transparence. Typically, the fluorescence spectra show that the strongest fluorescence emission peak of the Eu-PUA material appears at 614 nm at the excitation wavelength of 395 nm. This demonstrates that such material can be applied to functional optical materials in the future.
机译:制备稀土(Eu)盐Eu(AA)_3(AA:丙烯酸基)和链末端含有乙烯基的聚氨酯丙烯酸酯(MPUA)的大分子单体,以实现新型透明Eu(AA)_3-聚氨酯丙烯酸酯(Eu-PUA)材料通过共聚。通过红外光谱(FTIR),质子和碳核磁共振(〜1H-NMR,13C-NMR),热重分析(TGA)对Eu(AA)_3和Eu-PUA的结构和性质进行了系统表征动态力学分析(DMA)和荧光分光光度计。证明Eu(AA)_3已成功结合到聚氨酯丙烯酸酯的分子链上,并且在Eu(AA)_3存在下聚氨酯丙烯酸酯的玻璃化转变温度(T _g)升高。另外,Eu-PUA材料显示出良好的热稳定性和透明性。典型地,荧光光谱显示出Eu-PUA材料的最强的荧光发射峰在395nm的激发波长处出现在614nm处。这证明了这种材料将来可以应用于功能性光学材料。

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