论文部分内容阅读
以三官能度端烷羟基聚醚型硅油作为有机硅原料制得低程度交联的含硅聚氨酯水分散体,并以此为种子乳液,加入丙烯酸酯类混合单体进行自由基聚合,得到具有核壳结构的含硅聚氨酯-丙烯酸酯复合乳液(AS)。通过红外光谱确定了聚氨酯的主链结构。考察了聚醚型硅油用量对种子乳液性能的影响。使用透射电镜、热重分析等测试手段,对AS乳液及胶膜的性能进行分析和表征。复合胶膜耐热性改善明显,聚氨酯和丙烯酸酯之间形成了很好的核壳结构,有机硅在成膜时确实有向涂膜表面迁移、富集的趋势。
A tri-functional terminal hydroxyl-terminated polyether-based silicone oil was used as a raw material for the silicone to prepare a low-degree cross-linked silicon-containing polyurethane aqueous dispersion. The seed emulsion was then subjected to radical polymerization by adding acrylic ester-based mixed monomers to obtain Core-shell structure of silicone-containing polyurethane - acrylate composite emulsion (AS). The main chain structure of polyurethane was confirmed by infrared spectroscopy. The effects of the amount of polyether silicone oil on the properties of seed emulsion were investigated. Using transmission electron microscopy, thermogravimetric analysis and other testing methods, the performance of AS emulsion and film were analyzed and characterized. The heat resistance of the composite film is obviously improved, and a good core-shell structure is formed between the polyurethane and the acrylate. Silicone does have a tendency of migration and enrichment to the coating film surface when the film is formed.