拉伸流动静态混合器混合性能的实验研究

设计了1种能够增强聚合物混合效果的拉伸流动静态混合器（EFM），以高密度聚乙烯/聚苯乙烯（PE?HD/PS）作为混合体系，根据共混体系扫描电子显微镜（SEM）照片及分散相的平均粒径，研究了不同盘形结构和不同盘棱间隙（δ）（0.125~2.0 mm）下EFM的混合性能。结果表明，EFM的盘形入口结构对其混合性能影响较小，混合能力随盘棱顶端圆角半径的增大而有所提升，随δ的增大出现先降低再升高又降低的变化趋势。

Experimental study on mixing performance of extensional flow static mixer

An extensional flow static mixer was designed for enhancing the mixing effect in the polymer process. Taking the high?density polyethylene/polystyrene mixture as a mixing system， combining with the SEM images of the mixing system and the average particle size of the dispersed phase， the mixing performance of the extensional flow static mixer with different plate structures and gaps （0.125~2.0 mm） was investigated. The results indicated that there was little influence on the mixing performance from the plate inlet structure of the extensional flow static mixer. A larger fillet radius at the top of the plate resulted in a better the mixing effect. As the plate gap increased， the mixing performance presented a decreasing?increasing?decreasing trend.