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首页> 外文期刊>Journal of Applied Polymer Science >Simulation of continuous solid-phase polymerization of nylon 6,6. III. Simplified model
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Simulation of continuous solid-phase polymerization of nylon 6,6. III. Simplified model

机译：尼龙6,6连续固相聚合的模拟。三，简化模型

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Solid-phase polymerization (SPP) reactors are used to increase the degree of polymerization (DP) during nylon 6,6 production. In previous articles, a reactor model with partial differential equations (PDEs) in time and two spatial dimensions was developed to describe dynamic changes in polymer property profiles (DP, temperature, and moisture content) over the height of the reactor and within the polymer particles. In the current article, a simplified model is developed by deriving appropriate expressions for heat- and mass-transfer coefficients and performing a lumped heat- and mass-transfer analysis. Using this approach, the radial dimension is removed from the PDEs, so that the effort required to solve the model equations is substantially reduced. Predictions of the complex and simplified models are compared through simulation of two different start-up processes. Good agreement between simplified and complex models is obtained, indicating that the simplified model can be used in place of the complex model if the polymer properties profiles within individual particles are not of particular concern to the model user. (C) 2003 Wiley Periodicals, Inc. [References: 14]
机译：固相聚合（SPP）反应器用于增加尼龙6,6生产过程中的聚合度（DP）。在先前的文章中，开发了具有时间和两个空间维的偏微分方程（PDE）的反应器模型，以描述反应器高度以及在聚合物颗粒内的聚合物特性曲线（DP，温度和水分含量）的动态变化。 。在当前文章中，通过推导传热和传质系数的适当表达式并执行集总传热和传质分析来开发简化模型。使用这种方法，可以从PDE中去除径向尺寸，从而大大减少了求解模型方程式所需的工作量。通过模拟两个不同的启动过程，可以比较复杂模型和简化模型的预测。在简化模型和复杂模型之间获得了良好的一致性，表明如果单个颗粒内的聚合物特性曲线不是模型用户特别关心的，则可以使用简化模型代替复杂模型。 （C）2003 Wiley Periodicals，Inc. [参考：14]

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