Journal of Catalysis 360 (2018) 57–65 Contents lists available at ScienceDirect Journal of Catalysis journal homepage: www.elsevier.com/locate/jcat Kinetics and mechanism of ethylene polymerization with TiCl /MgCl 4 2 model catalysts: Effects of titanium content Baiyu Jiang, Yuhong Weng, Shuangjie Zhang, Zhen Zhang, Zhisheng Fu, Zhiqiang Fan MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China article i nfo abstract Article history: Two MgCl -supported Ziegler–Natta catalysts were prepared by loading TiCl onto activated d-MgCl sup- 2 4 2 Received 12 October 2017 ports, which contained 0.1 wt% (Cat-1) and 1.0 wt% (Cat-2) of titanium (Ti), respectively. Cat-1 has a Revised 19 December 2017 2 3 slightly larger speciﬁc surface area (88.1 m /g) and nearly the same pore volume (0.45 cm /g) as the d- Accepted 9 January 2018 MgCl support, but the catalyst with 1.0% Ti (Cat-2) has smaller speciﬁc surface area (66.3 m /g) and pore Available online 22 February 2018 volume (0.40 cm /g). The kinetics and active center distribution of ethylene polymerization with the cat- alysts were compared. Cat-1 showed much higher activity per gram of titanium than Cat-2, which can be Keywords: ⁄ attributed
Journal of Catalysis – Elsevier
Published: Apr 1, 2018
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