Ethylene Polymerization Kinetics and Microstructure of Polyethylenes Made with Supported Metallocene Catalysts,Industrial & Engineering Chemistry Research

当前位置： X-MOL 学术 › Ind. Eng. Chem. Res. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Ethylene Polymerization Kinetics and Microstructure of Polyethylenes Made with Supported Metallocene Catalysts
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-06-16 , DOI: 10.1021/acs.iecr.1c01091
Saeid Mehdiabadi ₁ , Olivier Lhost ₂ , Aurelien Vantomme ₂ , João B. P. Soares ₁

Affiliation

The microstructure of polyolefins made with a metallocene supported on a porous carrier is generally less homogeneous than when the polyolefin is made with the same unsupported metallocene. For instance, the molecular weight and chemical composition distributions of ethylene/1-olefin copolymers are often broader when they are made with a supported metallocene. In this article, a mathematical model is used to quantify this phenomenon. The polymerization of ethylene was investigated in parallel semi-batch reactors using a metallocene catalyst supported on an inorganic porous carrier. Ethylene pressure, polymerization temperature, and H₂ concentration were the factors changed to study ethylene polymerization kinetics with this catalyst system. Modeling results showed that a three-site model was needed to describe the molecular weight distributions of the polyethylene samples made with this catalyst.

中文翻译：

负载型茂金属催化剂聚乙烯的乙烯聚合动力学和微观结构

由负载在多孔载体上的茂金属制成的聚烯烃的微观结构通常不如由相同的未负载茂金属制成的聚烯烃均匀。例如，当乙烯/1-烯烃共聚物由负载型茂金属制成时，它们的分子量和化学组成分布通常更宽。在本文中，使用数学模型来量化这种现象。使用负载在无机多孔载体上的茂金属催化剂在平行的半间歇反应器中研究乙烯的聚合。乙烯压力、聚合温度和 H ₂浓度是改变使用该催化剂体系研究乙烯聚合动力学的因素。建模结果表明，需要一个三点模型来描述用这种催化剂制备的聚乙烯样品的分子量分布。

更新日期：2021-07-14

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11