纳米二氧化钛改性聚氨酯乳液性能初探  

Modification of aqueous polyurethane by nano-TiO_2 dispersion

作　　者：李坚[1] 许然[1] 姚超[1] 

机构地区：[1]江苏工业学院材料科学与工程系,江苏省常州市213016

出　　处：《中国胶粘剂》2005年第5期6-9,共4页China Adhesives

摘　　要：主要讨论了纳米二氧化钛对聚氨酯乳液的改性。首先讨论了在二氧化钛纳米分散液中制备聚氨酯乳液的可行性,分别制备了纳米二氧化钛改性的芳香族聚氨酯和脂肪族聚氨酯乳液,得到了稳定乳液。通过紫外光谱分析,发现脂肪族聚氨酯与纳米二氧化钛共聚乳液薄膜在紫外区域400-200nm区域出现很明显的吸收峰。纳米二氧化钛的加入使芳香族聚氨酯乳液胶膜的拉伸强度增强,断裂伸长率下降。此外,对试样进行了DSC分析,发现共聚物在136-145℃出现明显的新的吸热峰。The modification of aqueous polyurethane by nano-TiO2 dispersion was discussed in this pa per. The stable modification emulsions of nano-TiO2 and polyurethanes were obtained. It was also found that the film of the modification emulsion showed a broad absorption peak in the 200-400nm ultraviolet spectra. And the tensile strength of the copolymer film was increased with the increasing amount of nano-TiO2. After adding nano-TiO2,it was also discovered that new heat absorbing peaks around 135-145℃ appeared by DSC.

关 键 词：分散液 聚氨酯乳液 纳米二氧化钛 改性 

分 类 号：TQ433.432[化学工程] TQ436.5