Two-State Models for Olefin Polymerization using Metallocene Catalysts. 1. Application to Fluxional Metallocene Catalyst Systems

2000 ◽  
Vol 33 (20) ◽  
pp. 7249-7260 ◽  
Author(s):  
Márcio Nele ◽  
Scott Collins ◽  
M. L. Dias ◽  
J. C. Pinto ◽  
Shirley Lin ◽  
...  
2001 ◽  
Vol 34 (12) ◽  
pp. 3830-3841 ◽  
Author(s):  
Marcio Nele ◽  
Muqtar Mohammed ◽  
Shixuan Xin ◽  
Scott Collins ◽  
Marcos L. Dias ◽  
...  

Author(s):  
Zhongyue Zhang ◽  
Xiaofang Duan ◽  
Ying Zheng ◽  
Jingzun Wang ◽  
Guangzhong Tu ◽  
...  

2014 ◽  
Vol 900 ◽  
pp. 11-14 ◽  
Author(s):  
Wei Zhou ◽  
Lei Zhong ◽  
Wei Dong Li

The research progresses about polyolefin catalyst systems in recent years are summarized. Focusing on the type and properties of the catalytic polymerization of the olefin polymerization catalyst, including typical Ziegler-Natta catalysts, metallocene catalysts and post-transition metal catalyst system. Then the new post-transition metal catalyst is introduced.


Catalysts ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 842
Author(s):  
Qing Yang ◽  
Max Paul McDaniel

Both metallocene and Phillips chromium catalysts are used in the commercial manufacture of polyethylene. Unlike most other commercial metallocene systems, the Chevron Phillips Chemical (CPC) platform does not use methylaluminoxane or fluoroorganic boranes. Instead, the support itself serves to activate (ionize) the metallocenes, which then polymerize ethylene at high activity. Most of these solid acid supports can also be used to anchor Cr to make a Phillips catalyst. This provides an interesting opportunity to compare the polymerization responses by these two disparate systems, Phillips Cr and CPC metallocene, when supported on the same solid acid carriers. In this study, both chromium oxide and several metallocenes were deposited onto a variety of solid oxides, under a variety of conditions, and the resulting support effects were observed and compared. Although using seemingly different chemistries, the two catalyst systems exhibited a surprising number of similarities, which can be attributed to the acidity and porosity of these diverse supports.


ChemCatChem ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 628-635 ◽  
Author(s):  
Cham‐Chuen Liu ◽  
Qian Liu ◽  
Po‐Kam Lo ◽  
Kai‐Chung Lau ◽  
Shek‐Man Yiu ◽  
...  

1995 ◽  
Vol 16 (12) ◽  
pp. 905-911 ◽  
Author(s):  
Kazuo Soga ◽  
Takashi Arai ◽  
Ban The Hoang ◽  
Toshiya Uozumi

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