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首页> 外文期刊>Journal of Applied Polymer Science >Method for quantitative evaluation of kinetic constants in olefin polymerizations. II. Kinetic study of a high-activity Ziegler-Natta catalyst used for bulk propylene polymerizations
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Method for quantitative evaluation of kinetic constants in olefin polymerizations. II. Kinetic study of a high-activity Ziegler-Natta catalyst used for bulk propylene polymerizations

机译：烯烃聚合中动力学常数的定量评估方法。二。用于本体丙烯聚合的高活性齐格勒-纳塔催化剂的动力学研究

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摘要

A method for quantitative evaluation of kinetic constants in Ziegler-Natta and metallocene olefin polymerizations presented previously (Matos, V.; Mattos Neto, A. G.; Pinto, J. C. I Appl Polym Sci 2001, 79, 2076) is adapted to allow the estimation of kinetic constants for bulk propylene polymerizations by using a conventional fourth-generation high-activity Ziegler-Natta catalyst (HAC). In this particular case, reaction rate profiles are not available, so that estimation of kinetic data must rely on average polymer yields. The method comprises some fundamental steps, including the initial design of a statistical experimental plan, the execution of the designed experiments, the development of simple mathematical models to describe the polymerization, and the estimation of kinetic parameters from available yields, gel permeation chromatography (GPC), and nuclear magnetic resonance (NMR) data. It is shown that the proposed method allows the successful interpretation of experimental olefin polymerization data and the quantitative evaluation of kinetic parameters, which can be inserted into a process simulator to provide an accurate picture of actual industrial plant behavior. (C) 2002 Wiley Periodicals, Inc. [References: 28]
机译：先前提出的定量评估齐格勒-纳塔和茂金属烯烃聚合反应动力学常数的方法（Matos，V .; Mattos Neto，AG; Pinto，JCI I Appl Polym Sci 2001，79，2076）适用于估算动力学使用常规的第四代高活性齐格勒-纳塔催化剂（HAC）进行本体丙烯聚合的常数。在这种特殊情况下，无法获得反应速率曲线，因此动力学数据的估算必须依赖于平均聚合物收率。该方法包括一些基本步骤，包括统计实验计划的初始设计，设计实验的执行，描述聚合反应的简单数学模型的开发以及从可用收率估算动力学参数，凝胶渗透色谱法（GPC） ）和核磁共振（NMR）数据。结果表明，所提出的方法可以成功解释实验性烯烃聚合数据并定量评估动力学参数，可以将其插入过程仿真器中，以提供实际工厂实际行为的准确图片。 （C）2002 Wiley Periodicals，Inc. [参考：28]

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