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首页> 外文期刊>Macromolecular theory and simulations >Computational Modeling of Particle Fragmentation in the Heterogeneous Olefin Polymerization
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Computational Modeling of Particle Fragmentation in the Heterogeneous Olefin Polymerization

机译:非均相烯烃聚合过程中颗粒破碎的计算模型

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摘要

The effect of fragmentation rate of a catalyst/polymer particle and diffusivity ratio inside cracks to fragments on reaction rate and molecular weight distribution are studied. A split algorithm is developed to reduce the computational cost and make it possible to simulate fragmentation on a normal PC computer. The simulation results show that the fragmentation rate and diffusivity ratio have a considerable effect on the polymerization rate and molecular properties of the polymer. In fragmentation process, the radial cracks play an important role to feed monomer into the particle to increase the reaction rate. To evaluate the accuracy of split algorithm, its results are compared with a normal method of solution for sample cases. The developed 2D model is also validated on a benchmark problem.
机译:研究了催化剂/聚合物颗粒的破碎率以及裂纹内部的扩散率对碎片的反应率和分子量分布的影响。开发了一种拆分算法以减少计算成本,并可以在普通PC计算机上模拟碎片。模拟结果表明,断裂速率和扩散率对聚合物的聚合速率和分子性能有很大影响。在破碎过程中,径向裂纹在将单体加入颗粒中以提高反应速率起着重要作用。为了评估分割算法的准确性,将其结果与样本案例的常规解决方案进行了比较。所开发的2D模型也已针对基准问题进行了验证。

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