聚氨酯脲-丙烯酸酯水分散液的粒径及形态研究

Particle Size and Morphology of Aqueous Polyurethaneurea acrylic Dispersions

摘要: 研究了羧基含量、异氰酸酯指数（［－ＮＣＯ］／［－ＯＨ］）、聚氨酯脲与聚丙烯酸酯组成比（ＰＵＵ／ＰＡ）以及一系列制备工艺因素对聚氨酯脲—丙烯酸酯（ＰＵＡ）水分散液粒子尺寸及形态的影响。结果表明：羧基含量和ＰＵＵ／ＰＡ组成比增大或异氰酸酯指数减小都会导致分散液粒径减小；ＰＵＡ中ＰＡ含量越大，ＰＵＡ水分散液粒子形态越不规整；工艺因素如搅拌强度、升温速率等对ＰＵＡ水分散液粒子尺寸及形态的影响不符合传统乳液聚合的规律。

Abstract: The particle size and morphology of water borne polyurethaneurea(PUU) polyacrylate(PA),which was called as PUA, were studied. It was found that many factors, such as the content of carboxyl groups, NCO/OH molar ratio, the PU/PA wt. ratio and the t