【作者】 孙艳松；

【导师】 许戈文；

【作者基本信息】 安徽大学 ， 高分子化学与物理， 2005， 硕士

【摘要】 水性聚氨酯分散体已经被广泛的研究,并己在许多方面得到了应用。尽管研究水性聚氨酯分散体的结构与性能的文章很多。到目前为止,水性聚氨酯染料方面的研究却很少见报道。本论文研究工作涉及水性聚氨酯染料及相关很多领域,都建立在水性聚氨酯的理论和基础上。 水性聚氨酯分散蓝G染料(PU-DBG)的制备与表征 通过改性的丙酮法合成一种新型的水性聚氨酯分散蓝G染料,并用FTIR、UV-Vis、DSC、TME、TGA和WAXD进行研究。 1.在PU-DBG的FT-IR中可以明显看到分散蓝-G的羰基吸收峰,说明分散G已经被接入聚氨酯链中。 2.通过PU-DBG高分子染料与分散蓝G小分子染料UV-Vis光谱相比,可以明显的看出PU-DBG高分子染料在510nm和760nm处新增了两个吸收峰。 3.DSC表明此高分子染料在55℃有一个玻璃化转变温度。 4.在PU-DBG染料的TGA曲线中,可以看出PU-DBG染料分两个阶段降解。 5.TEM显示PUDB-DBG染料分子聚集成一种特殊的形状——叶脉状。 6.通WAXD曲线可以看出PU-DBG高分子染料大角度(2θ≈19°)不仅有一个较弥散的衍射峰,这进一步证实了PU-DBG中软段与硬段均为非晶玻璃态无定型共聚物。更多还原

【Abstract】 Aqueous polyurethane dispersions have been extensively studied and applied in many fields. Many papers have reported that structure and properties of aqueous polyurethane dispersion were influenced by chemical structure and stoichiometric ratio of hard and soft segments. Up to now, the synthesis and study of aqueous polyurethane dyes have been rarely reported in the previous literatures.Synthesis and Research of a Novel Aqueous Polyurethane-Disperse Blue-G(PU-DBG)A novel polymeric dye of aqueous Polyurethane-Disperse Blue-G was synthesized by our modified acetone of process, which was characterized by the analysis of FTIR, UV-Vis spectroscopy, DSC, TEM, TGA and WAXD:1. Fourier Transform Infrared Spectroscopy(FT-IR) was used to identify the structure of the polymeric dye, indicating an obvious carbonyl stretching absorption in Disperse Blue-G. which confirmed that disperse blue-G had been bonded to the pre-polyurethane.2. UV-Vis spectroscopy showed three same absorption at 555nm, 600 nm and 650nm for the chloroform solution of disperse blue-Gand PU-DBG,But there was another peak only appeared at 510nm of polymer spectrum. In addition, UV-Vis spectra of the aqueous dispersion PU-DBG also showed a new absorption at 760nm.3. DSC analysis showed that the PU-DBG has a single glass transition temperature of 55℃ .4. TEM made clear that the PU-DBG has a unique shape resembling the leaves of bamboo.5. TGA measurement indicated a two-stage degradation for the PU-DBG.6. WAXD spectra implied the film of PU-DB14 was amorphous for A wide peak (2 6 ^19° ) .更多还原