Citation: Alireza Talaei, Faramarz Afshar Taromi, Ahmad Arefazar, Saeid Ahmadjo, Omid Moini Jazani. The Influence of Bridge Type on the Activity of Supported Metallocene Catalysts in Ethylene Polymerization[J]. Chinese Journal of Polymer Science, ;2014, 32(2): 137-142. doi: 10.1007/s10118-014-1381-5 shu

The Influence of Bridge Type on the Activity of Supported Metallocene Catalysts in Ethylene Polymerization

1.
Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, Tehran, Iran
2.
Department of Catalyst, Iran Polymer and Petrochemical Institute (IPPI), Tehran, Iran
3.
Department of Chemical Engineering, College of Engineering, University of Isfahan, Isfahan, Iran

Corresponding author: Ahmad Arefazar,
Received Date: 15 February 2013
Revised Date: 9 May 2013

Fund Project: This work was financially supported by the National Iranian Petrochemical Company Research and Technology (NIPC-RT).

Ethylene polymerization was carried out by immobilization of rac-ethylenebis(1-indenyl)zirconium dichloride (Et(Ind)2ZrCl2) and rac-dimethylsilylbis(1-indenyl)zirconium dichloride (Me2Si(Ind)2ZrCl2) preactivated with methylaluminoxane (MAO) on calcinated silica at different temperatures. Polymerizations of ethylene were conducted at different temperatures to find the optimized polymerization temperature for maximum activity of the catalyst. The Me2Si bridge catalyst showed higher activity at the lower polymerization temperature compared to the Et bridge catalyst. The highest catalytic activities were obtained at temperatures about 50 ℃ and 70 ℃ for Me2Si(Ind)2ZrCl2/MAO and Et(Ind)2ZrCl2/MAO catalysts systems, respectively. Inductively coupled plasma-atomic emission spectroscopy results and polymerization activity results confirmed that the best temperature for calcinating silica was about 450 ℃ for both catalysts systems. The melting points of the produced polyethylene were about 130 ℃, which could be attributed to the linear structure of HDPE.
- Slurry polymerization,
- Olefin polymerization,
- ansa-Metallocene,
- Silica support
1. [1]
1. [1]
  Hailong He , Wenbing Wang , Wenmin Pang , Chen Zou , Dan Peng . Double stimulus-responsive palladium catalysts for ethylene polymerization and copolymerization. Chinese Chemical Letters, 2024, 35(7): 109534-. doi: 10.1016/j.cclet.2024.109534
2. [2]
  Bing Niu , Honggao Huang , Liwei Luo , Li Zhang , Jianbo Tan . Coating colloidal particles with a well-defined polymer layer by surface-initiated photoinduced polymerization-induced self-assembly and the subsequent seeded polymerization. Chinese Chemical Letters, 2025, 36(2): 110431-. doi: 10.1016/j.cclet.2024.110431
3. [3]
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4. [4]
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5. [5]
  Heng Gao , Zhaocong Cheng , Guangshui Tu , Zonglin Qiu , Xieyi Xiao , Haotian Zhou , Handou Zheng , Haiyang Gao . Thermally robust bis(imino)pyridyl iron catalysts for ethylene polymerization: Synergy effects of weak π-π interaction, steric bulk, and electronic tuning. Chinese Chemical Letters, 2025, 36(5): 110762-. doi: 10.1016/j.cclet.2024.110762
6. [6]
  Fei Yin , Erli Yang , Xue Ge , Qian Sun , Fan Mo , Guoqiu Wu , Yanfei Shen . Coupling WO₃₋_x dots-encapsulated metal-organic frameworks and template-free branched polymerization for dual signal-amplified electrochemiluminescence biosensing. Chinese Chemical Letters, 2024, 35(4): 108753-. doi: 10.1016/j.cclet.2023.108753
7. [7]
  Xinyu You , Xin Zhang , Shican Jiang , Yiru Ye , Lin Gu , Hexun Zhou , Pandong Ma , Jamal Ftouni , Abhishek Dutta Chowdhury . Efficacy of Ca/ZSM-5 zeolites derived from precipitated calcium carbonate in the methanol-to-olefin process. Chinese Journal of Structural Chemistry, 2024, 43(4): 100265-100265. doi: 10.1016/j.cjsc.2024.100265
8. [8]
  Jinli Chen , Shouquan Feng , Tianqi Yu , Yongjin Zou , Huan Wen , Shibin Yin . Modulating Metal-Support Interaction Between Pt3Ni and Unsaturated WOx to Selectively Regulate the ORR Performance. Chinese Journal of Structural Chemistry, 2023, 42(10): 100168-100168. doi: 10.1016/j.cjsc.2023.100168
9. [9]
  Dong Sui , Jiayi Liu . Constriction-susceptible lithium support for fast cycling of solid-state lithium metal battery. Chinese Chemical Letters, 2025, 36(2): 110417-. doi: 10.1016/j.cclet.2024.110417
10. [10]
  Yunxia Liu , Guandong Wu , Lin Li , Yiming Niu , Bingsen Zhang , Botao Qiao , Junhu Wang . Construction of sintering-resistant gold catalysts via ascorbic-acid inducing strong metal-support interactions. Chinese Chemical Letters, 2025, 36(4): 110608-. doi: 10.1016/j.cclet.2024.110608
11. [11]
  Yu-Yao Li , Xiao-Hui Li , Zhi-Xuan An , Yang Chu , Xiu-Li Wang . Room-temperature olefin epoxidation reaction by two 2D cobalt metal-organic complexes under O₂ atmosphere: Coordination and structural regulation. Chinese Chemical Letters, 2025, 36(4): 109716-. doi: 10.1016/j.cclet.2024.109716
12. [12]
  Jin Long , Xingqun Zheng , Bin Wang , Chenzhong Wu , Qingmei Wang , Lishan Peng . Improving the electrocatalytic performances of Pt-based catalysts for oxygen reduction reaction via strong interactions with single-CoN₄-rich carbon support. Chinese Chemical Letters, 2024, 35(5): 109354-. doi: 10.1016/j.cclet.2023.109354
13. [13]
  Xingxing Jiang , Yuxin Zhao , Yan Kong , Jianju Sun , Shangzhao Feng , Xin Lu , Qi Hu , Hengpan Yang , Chuanxin He . Support effect and confinement effect of porous carbon loaded tin dioxide nanoparticles in high-performance CO₂ electroreduction towards formate. Chinese Chemical Letters, 2025, 36(1): 109555-. doi: 10.1016/j.cclet.2024.109555
14. [14]
  Zhaomin Tang , Qian He , Jianren Zhou , Shuang Yan , Li Jiang , Yudong Wang , Chenxing Yao , Huangzhao Wei , Keda Yang , Jiajia Wang . Active-transporting of charge-reversal Cu(Ⅱ)-doped mesoporous silica nanoagents for antitumor chemo/chemodynamic therapy. Chinese Chemical Letters, 2024, 35(7): 109742-. doi: 10.1016/j.cclet.2024.109742
15. [15]
  Jichun Li , Zhengren Wang , Yu Deng , Hongxiu Yu , Yonghui Deng , Xiaowei Cheng , Kaiping Yuan . Construction of mesoporous silica-implanted tungsten oxides for selective acetone gas sensing. Chinese Chemical Letters, 2024, 35(11): 110111-. doi: 10.1016/j.cclet.2024.110111
16. [16]
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17. [17]
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18. [18]
  Tong Zhang , Xiaojing Liang , Licheng Wang , Shuai Wang , Xiaoxiao Liu , Yong Guo . An ionic liquid assisted hydrogel functionalized silica stationary phase for mixed-mode liquid chromatography. Chinese Chemical Letters, 2025, 36(1): 109889-. doi: 10.1016/j.cclet.2024.109889
19. [19]
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20. [20]
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