Preparation of graphene/MgCl₂-supported Ti-based Ziegler-Natta catalysts by the coagglomeration method and their application in ethylene polymerization

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• 作者：Hexin Zhang^a ; ^b ; Jae-Hyeong Park^a ; Young-Kwon Moon^a ; Eun-Bin Ko^a ; Dong-ho Lee^a ; Yanming Hu^b ; Xuequan Zhang^b ; ^{polyhx@ciac.ac.cn} ; Keun-Byoung Yoon^a ; ^{kbyoon@knu.ac.kr}
• 关键词：Ziegler-Natta catalyst ; Polyethylene ; Graphene ; Nanocomposite ; In-situ polymerization
• 刊名：Chinese Journal of Catalysis
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：38
• 期：1
• 页码：131-137
• 全文大小：3118 K
• 卷排序：38

文摘

We report a facile coagglomeration method for preparing graphene (G)/MgCl2-supported Ti-based Ziegler-Natta catalysts. The effects of graphene feed ratio on catalyst morphology and ethylene polymerization behavior were examined. The synthesized catalyst exhibited very high activity for ethylene polymerization. The resultant polyethylene (PE)/G nanocomposites showed a layered morphology, and the graphene fillers were well dispersed in the PE matrix. In addition, the thermal stability and mechanical properties of PE were significantly enhanced with the introduction of a very small amount of G fillers (0.05 wt%). This work provides a facile approach to the production of high-performance PE.