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首页> 外文期刊>Journal of industrial and engineering chemistry >Effects of agitation in emulsion polymerization of vinyl acetate, ethylene, and N-methylol acrylamide
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Effects of agitation in emulsion polymerization of vinyl acetate, ethylene, and N-methylol acrylamide

机译：搅拌对乙酸乙烯酯，乙烯和N-羟甲基丙烯酰胺乳液聚合的影响

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摘要

The emulsion polymerization of vinyl acetate monomer (VAM), ethylene and N-methylol acrylamide (NMA) was carried out in a high pressure stirred reactor using an Rushton flat blade impeller at a rotational speed of 300 rpm under a semi-batch polymerization process, which was subsequently grown by the continuous addition of monomers (VAM, ethylene, and NMA). The particle diameters of the samples withdrawn during polymerization were determined by using capillary hydrodynamic fractionation (CHDF). Also, the number of particles was calculated from the data obtained by CHDF. Coagulum formation was studied. It was found that coagulum formation increased with increasing conversion and auto-accelerated from ca. 20% conversion. The definition of coagulum in this research was presented. The coagulum formation pattern on the impeller was shown. Also, the flow pattern in the reactor under the same geometrical configuration and operating conditions was simulated.
机译：乙酸乙烯酯单体（VAM），乙烯和N-羟甲基丙烯酰胺（NMA）的乳液聚合是在高压搅拌反应器中使用Rushton平板叶轮在300 rpm的转速下进行的半间歇式聚合工艺，随后通过连续添加单体（VAM，乙烯和NMA）使其生长。通过使用毛细管流体动力学分级法（CHDF）测定聚合过程中取出的样品的粒径。另外，根据通过CHDF获得的数据计算颗粒数。研究了Coagulum的形成。发现凝结物的形成随着转化率的增加而增加，并从大约20μm处自动加速。 20％的转化率。介绍了本研究中凝结物的定义。示出了叶轮上的凝结物形成模式。同样，在相同的几何构型和运行条件下，模拟了反应器中的流态。

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