摘要： 通过原位聚合或直接共混合成了由吐温 -80 改性的纳米 SiO2与聚氨酯的复合乳液，并用粒度分析、UV- Vis和 DSC等技术进行了表征。结果表明:原位聚合法制得的复合乳液涂膜的性能提升比直接共混明显，加入适量通 过吐温 -80 改性的 SiO2纳米粒子可以使制备的水性聚氨酯分散体粒径分布均匀，稳定性好，而且能够同时增加涂膜的 拉伸强度、断裂伸长率以及耐候性。
关键词:
聚氨酯 ,
纳米SiO2,
复合乳液,
原位聚合
Abstract: The title nano-SiO2 (modified by Tween-80) /Polyurethane complex emulsion was pre-pared via in-situ polymerization or directly blending and characterized by PSA，UV-Vis and DSC.The re-sults indicate that the properties of film prepared by in-situ polymerization are better than that by direct blending.The appropriate adition of nano-SiO2 modified by Tween-80 can make the particle of water-borne PU dispersion evenly distributed and more stable.In addtion，the weatherability，tensile strength and even the breaking elongation of the film are improved.
Key words:
polyurethane,
nano-SiO2,
compound emulsion,
situ polymerization
杨 霞, 李晓平, 丁志明. 改 性 纳 米 SiO2 /聚 氨 酯 复 合 乳 液 的 研 究[J]. 涂料工业, 2009, 39(2): 1-3.
Yang Xia, Li Xiaoping, Ding Zhiming. Sduty of Modified Nano-SiO2/Polyurethane Compound Emulsion[J]. Paint & Coatings Industry, 2009, 39(2): 1-3.