Influence of polymerization conditions on the structure and properties of polyethylene/polypropylene in-reactor alloy synthesized in the gas phase with a spherical Ziegler–Natta catalyst

2006 ◽  
Vol 101 (4) ◽  
pp. 2136-2143 ◽  
Author(s):  
Zhisheng Fu ◽  
Qi Dong ◽  
Na Li ◽  
Zhiqiang Fan ◽  
Junting Xu
Keyword(s):  
Gas Phase ◽  
Structure And Properties ◽  
Natta Catalyst ◽  
Polymerization Conditions ◽  
Ziegler Natta Catalyst

A Comparison of the Influence of Temperature During Slurry and Gas Phase Propylene Polymerization on Ziegler-Natta Catalyst

2016 ◽  
Vol 370 (1) ◽  
pp. 41-51 ◽  
Author(s):  
Aarón J. Cancelas ◽  
Goond Hongmanee ◽  
Fabiana N. Andrade ◽  
Minoru Terano ◽  
Toshiaki Taniike ◽  
...  
Keyword(s):  
Gas Phase ◽  
Propylene Polymerization ◽  
Influence Of Temperature ◽  
Natta Catalyst ◽  
Ziegler Natta Catalyst

Synthesis of Propylene/1-Butene Copolymers with Ziegler-Natta Catalyst in Gas-Phase Copolymerizations, 1

2005 ◽  
Vol 206 (23) ◽  
pp. 2333-2341 ◽  
Author(s):  
Fabricio M. Silva ◽  
Enrique L. Lima ◽  
José C. Pinto ◽  
Timothy F. McKenna
Keyword(s):  
Gas Phase ◽  
Natta Catalyst ◽  
Ziegler Natta Catalyst

Low Cis Polymerization of Butadiene Using TiCl4 and Bisupported with SiO2/MgCl2(Ethoxide Type)/TiCl4 Catalysts

2004 ◽  
Vol 77 (4) ◽  
pp. 736-744
Author(s):  
G. H. Zohuri ◽  
R. Mohebat ◽  
R. Jam Jah ◽  
S. Ahmadjo
Keyword(s):  
Chain Transfer ◽  
Molar Ratio ◽  
Polymerization Temperature ◽  
Gel Content ◽  
Natta Catalyst ◽  
Heterogenous Catalyst ◽  
Catalyst Systems ◽  
A Chain ◽  
Polymerization Conditions ◽  
Ziegler Natta Catalyst

Abstract To obtain low cis polymer of butadiene (PBR), heterogenous and homogeneous Ziegler-Natta catalyst of TiCl4 were used. SiO2 and Mg(OEt)2 were used as supports for the heterogenous catalyst, while TiCl2 was used as a soluble catalyst. Triisobutylaluminium (TIBA) was used as a cocatalyst. Optimum molar ratio of Al/Ti = 1.5 : 1 and Al:Ti = 13 : 1 were obtained for TiCl4/TIBA and SiO2/MgCl2 (ethoxide type)/TiCl4/TIBA catalyst systems, respectively, regarding productivity of the catalysts. Effect of the temperature of 25–65 °C on polymerization was studied for the bisupport one; while for the TiCl4 temperature control was difficult. This could be due to the obtained high gel content of polymer. The highest yield of PBR was obtained at 55 °C using the bisupported catalyst. Addition of H2 as a chain transfer agent decreased cis%, gel content and the yield of polymer obtained. Increasing polymerization temperature when H2 was used was negligible, which had an affect on the gel content of the polymer. Productivity of the bisupported catalyst was higher than the TiCl4 catalyst itself and the polymerization temperature was under control as well. Polymer with cis content of 4 to 65% was obtained using different catalyst and different polymerization conditions.

scholarly journals Evaluation of the Initial Stages of Gas-Phase Ethylene Polymerizations with a SiO2-Supported Ziegler-Natta Catalyst

2009 ◽  
Vol 3 (1) ◽  
pp. 47-57 ◽  
Author(s):  
Fabricio Machado ◽  
Enrique Luis Lima ◽  
José Carlos Pinto ◽  
Timothy F. McKenna
Keyword(s):  
Gas Phase ◽  
Natta Catalyst ◽  
Ziegler Natta Catalyst

Chain structure of polyethylene/polypropylene in-reactor alloy synthesized in gas phase with spherical Ziegler–Natta catalyst

2004 ◽  
Vol 53 (8) ◽  
pp. 1169-1175 ◽  
Author(s):  
Zhisheng Fu ◽  
Zhiqiang Fan ◽  
Yanzhong Zhang ◽  
Junting Xu
Keyword(s):  
Gas Phase ◽  
Chain Structure ◽  
Natta Catalyst ◽  
Ziegler Natta Catalyst

Structure and properties of polypropylene/poly(ethylene-co-propylene) in-situ blends synthesized by spherical Ziegler–Natta catalyst

Polymer ◽  
2001 ◽  
Vol 42 (13) ◽  
pp. 5559-5566 ◽  
Author(s):  
Zhi-qiang Fan ◽  
Yu-qing Zhang ◽  
Jun-ting Xu ◽  
Hai-tao Wang ◽  
Lin-xian Feng
Keyword(s):  
Structure And Properties ◽  
Natta Catalyst ◽  
Poly Ethylene ◽  
Ziegler Natta Catalyst
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