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首页> 外文期刊>Chemical Engineering Science >Correlation of polymer particle size with droplet size in suspension polymerisationof methylmethacrylate in a batch oscillatory-baffled reactor
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Correlation of polymer particle size with droplet size in suspension polymerisationof methylmethacrylate in a batch oscillatory-baffled reactor

机译：间歇振荡折流反应器中甲基丙烯酸甲酯悬浮聚合中聚合物粒径与液滴粒径的关系

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摘要

We report our pioneering experimental investigation of polymer particle size and size distribution in suspension polymerisation of methylmethacrylate (MMA) in a batch 50 mm diameter stainless-steel jacketed oscillatory-baffled reactor. In such a reactor, fluid mixing is achieved by eddies that are generated when fluid passes through a set of equally spaced stationary orifice baffles. Those periodically formed vortices can be controlled by a combination of operation of perational and geometrical parameters, such as oscillation frequency, oscillation amplitude, baffle diameter and baffle spacing. Based on a confidential and scaled-down formulation of a proprietary dental-grade MMA resin supplied by the Bonar Polymers, polymerisation reactions were performed under a controlled environment and the effects of the operational concitions on transient droplet size, final polymer particle size and their size dir=stributions are studied. The mean particle size of polymer, d_(v,0.5), is conpared with the Sauter mean size of droplet, d_(32), obtained with no reaction taking place and a correlation between d_(32) and d_(v,0.5) is established, which predicts the final particle sizes of polymer being made in such a reactor with a high degree of accuracy. In addition, a comparison of polymer particle size distribution, molecular weight distribution and residual initiator content is also carried out between our reactor and the traditional stirred-tank reactor.
机译：我们报告了我们在具有批头直径50 mm的不锈钢夹套振荡挡板反应器中进行的甲基丙烯酸甲酯（MMA）悬浮聚合中聚合物粒度和粒度分布的开创性实验研究。在这种反应器中，流体的混合是通过涡旋实现的，涡旋是当流体流过一组等距固定的固定挡板时产生的。那些周期性形成的涡流可以通过结合诸如振动频率，振动幅度，挡板直径和挡板间隔之类的穿孔和几何参数来控制。基于由Bonar Polymers提供的专有牙科级MMA树脂的机密且按比例缩小的配方，聚合反应是在受控环境下进行的，并且操作条件对瞬态液滴尺寸，最终聚合物粒径及其尺寸的影响研究了dir =贡献。聚合物的平均粒径d_（v，0.5）与没有反应发生的液滴的Sauter平均粒径d_（32）以及d_（32）和d_（v，0.5）之间的相关性相比较建立了“反应器”，其可以高度准确地预测在这种反应器中制备的聚合物的最终粒径。另外，在我们的反应器和传统的搅拌釜反应器之间也进行了聚合物粒度分布，分子量分布和残余引发剂含量的比较。

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