The role of primary and secondary stabilizers in the suspension polymerization of VCM and their effect on grain morphology (i.e., particle size distribution, grain porosity, and bulk density) is critically discussed. Using the modified Mooney equation, the time-varying viscosity of the suspension in an SPVC reactor is calculated in terms of the volume fraction of the dispersed monomer/polymer phase, the ratio of the viscosity of the dispersed phase over the viscosity of the continuous aqueous phase, and the maximum packing volume fraction of SPVC grains. A population balance equation is numerically solved to calculate the dynamic evolution of particle size distribution (PSD) in an industrial batch suspension VCM polymerization reactor. A porosity model is postulated to calculate the dynamic evolution of the PVC grain porosity with respect to monomer conversion and the extent of primary particle fusion. Finally, the underlying theory regarding the calculation of the required agitation power in SPVC reactors is detailed. It is shown that the time-varying viscosity of the suspension can be calculated and the PVC grain morphology (i.e., extent of particle agglomeration) can be accessed via the on-line estimation of the effective volume fraction of the dispersed phase using on-line power agitation measurements obtained from an industrial-scale SPVC reactor.

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关于 SPVC 反应器中悬浮液粘度、颗粒形态和搅拌功率的预测

主要和次要稳定剂在 VCM 悬浮聚合中的作用及其对晶粒形态（即粒度分布、晶粒孔隙率和堆积密度）的影响进行了批判性讨论。使用修正的门尼方程，SPVC 反应器中悬浮液的时变粘度根据分散单体/聚合物相的体积分数，即分散相粘度与连续水相粘度之比来计算。相，以及 SPVC 颗粒的最大堆积体积分数。对种群平衡方程进行数值求解，以计算工业间歇式悬浮 VCM 聚合反应器中粒度分布 (PSD) 的动态演变。假设一个孔隙率模型来计算 PVC 颗粒孔隙率相对于单体转化率和初级粒子融合程度的动态演变。最后，详细介绍了计算 SPVC 反应器所需搅拌功率的基本理论。结果表明，可以通过在线估计分散相的有效体积分数来计算悬浮液的时变粘度，并且可以访问 PVC 颗粒形态（即颗粒团聚程度）。从工业规模的 SPVC 反应器获得的动力搅拌测量值。