水性聚氨酯-聚丙烯酸酯核壳乳液研究进展

综述了采用丙烯酸酯类单体对水性聚氨酯进行改性的研究状况,在聚氨酯乳液存在下进行丙烯酸酯单体的乳液聚合,可以制备具有核壳结构的微观共混材料,使改性涂料树脂兼具两种聚合物的优点。对影响复合乳液粒子尺寸及其分布和性能的因素,例如DMPA含量、DMPA中和度、核壳粒子的增长、聚氨酯分子中硬段含量,复合乳液动力学和力学性能的研究进展,以及PMA乳液流变学特性及其影响因素,同样进行了讨论。

Research advances of waterborne polyurethane-polyacrylate emulsion with core-shell structure

In present paper,the modification of waterborne polyurethane(PU)by the polymerization of acry- lates was reviewed with 3Z refs.It included that the latex particles with core-shell structure would be formed and the modified polymers would exhibit both the excellent properties of polyurethane and polyacrylates when acrylates monomers were polymerized in the polyurethane emulsion.The effects of factors included,DMPA content,DMPA neutralization level,growth of core-shell particle,rigid chain segment content in PU,the ratio of polyurethane/arcylates on the complex latex particles size and distribution and the properties of polymer emulsion with core-shell structure,the research advances of dynamics and mechanical properties of complex emulsion and the rheological property character and of the complex emulsion and its effect factor were also dis- cussed.