Study on the Mechanism of the Phase Inversion Phenomenon in a Suspension Polymerization Reaction with a Combined-type Tomography Measurement System

使用两种可视化方法研究了经常用作聚合反应器的一类搅拌容器中的液-液体系的动态分散行为：首先，利用层析成像技术，从液-液两相系统的初始状态开始，对液-液两相系统的动力学行为进行了测量，（水-油（5，10%））存在于分离的层中，直至油相充分分散在水层中的最终状态。基于测量的结果获得分散时间与操作条件（例如叶轮转速和分散相的浓度）之间的关系，并且该方法，其中油相被分开并分散在整个容器中，被理解为与容器中的整体流动有关。随后，使用层析成像测量，可以掌握相转化现象，从水到水， 关于我们 通过突然改变叶轮高度，将油（30vol%）转化为水包油。此外，还可以通过动态地改变叶轮转速来掌握从油包水（50体积%）到水包油的相转化现象。相应地，人们发现，水在油和油在水的状态相互替换连续和可逆的到一定的点，但该替换成为不可逆的点之后，在并行，使用实时，快速的图像处理系统，单体油滴的动态分散过程进行了研究，首先，没有聚合反应。随后，通过在实际的悬浮聚合场中动态地测量液滴直径分布，获得了聚合反应期间平均液滴直径的动态变化数据，因此，希望继续研究液-液分散状态的动态行为，以便通过更精确的测量来阐明悬浮聚合反应期间相转化现象的机理。少

The dynamic dispersion behavior of liquid-liquid systems in a type of stirred vessel that is frequently used as a polymerization reactor was studied using two visualization methods: tomography measurements and a real-time, fast image processing system.Firstly, using tomography measurements, the dynamic behavior was measured from the initial state, in which the two phases of a liquid-liquid system (water-oil (5, 10%)) exist in separate layers, to the final state, in which the oil phase is sufficiently dispersed in the water layer The relation between the dispersion time and the operating conditions, such as the impeller rotational speed and the concentration of the dispersion phase, was obtained based on the results measured, and the process, in which the oil phase is divided and dispersed throughout the vessel, was understood in relation to the bulk flow in the vessel.Subsequently, using the tomography measurements, it was possible to grasp the phase inversion phenomenon, from Water in … More Oil (30vol%) to Oil in Water, by suddenly varying the impeller height. Further, it was also possible to grasp the phase inversion phenomenon, from Water in Oil (50vol%) to Oil in Water, by dynamically varying the impeller rotational speed. Accordingly, it was found that the Water in Oil and Oil in Water states replace each other continuously and reversibly up to a certain point, but that the replacement becomes irreversible after that point.In parallel, using a real-time, fast image processing system, the dynamic dispersion process of monomer oil droplets was investigated, firstly, without a polymerization reaction. Subsequently, data on the dynamic change of mean droplet diameter was obtained during a polymerization reaction by dynamically measuring the droplet diameter distribution in an actual suspension polymerization field.Thus, it is desired to continue to study the dynamic behavior of liquid-liquid dispersion states in order to clarify the mechanism of the phase inversion phenomenon during a suspension polymerization reaction by making more accurate measurements. Less