2-Ethylhexanol Modified Vanadium Oxytrichloride-Based Catalyst System for Ethylene/Propylene Copolymerization

被引：0

作者：

Na L. ^{[1
]}

Zhang L. ^{[2
]}

Hui L. ^{[2
]}

Zhang C. ^{[1
]}

Hu Y. ^{[1
]}

Zhang X. ^{[1
]}

机构：

[1] Key Laboratory of Synthetic Rubber, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun

[2] Shandong Non-Metallic Materials Institute, Jinan

来源：

Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2019年 / 35卷 / 01期

关键词：

Copolymerization; Ethylene-propylene copolymer; Vanadium-based catalyst;

D O I：

10.16865/j.cnki.1000-7555.2019.0006

中图分类号：

学科分类号：

摘要：

2-Ethylhexanol modified vanadium oxytrichloride [VOCl3•3(2-ethyl-hexanol)] as catalyst precursor was examined for ethylene/propylene copolymerization with ethylaluminium sesquichloride (EASC) as cocatalyst and ethyl trichloroacetate (ETCA) as reactivator, along with the traditional VOCl3-based system for comparison. The influences of EASC and ETCA loading levels as well as reaction temperature on the polymerization were investigated. With increasing the EASC dosage, the activities of both the systems increase and then decrease. The highest activities of VOCl3•3(2-ethyl-hexanol) and VOCl3-based systems, 6.15 kg EPR/gV•h and 4.97 kg EPR /gV•h, are observed at [Al]/[V] ratio of 40 and 30, respectively. While the catalytic activity of both systems decreases by increasing the polymerization temperature, the decline rate in the VOCl3•3(2-ethyl-hexanol) system is much lower than that in the VOCl3 system. These results indicate that the presence of 2-ethyl-hexanol effectively stablizes the generated acive species. Determined by DSC and 13C-NMR, the ethylene-propylene copolymer obtained with VOCl3•3(2-ethyl-hexanol) system has a higher propylene incorporation and more random structures than that prepared with the VOCl3 system. © 2019, Editorial Board of Polymer Materials Science & Engineering. All right reserved.

引用

页码：31 / 34and40

页数：3409

共 10 条

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