Results 31 to 40 of about 600,060 (165)

Mathematical modeling the effect of catalyst initial shape and the crack pattern in olefin copolymerization [PDF]

Polyolefins Journal, 2015
A two-dimensional (2D) single particle model for the copolymerization of propylene-ethylene with heterogeneous Ziegler-Natta catalyst is developed. The model accounts for the effects of the initial shape of the catalyst and carck/ pore patterns on the ...
Marzieh Nouri, Mahmoud Parvazinia, Hassan Arabi, Mohsen Najafi   +3 more
doaj   +1 more source

اثر اصلاح کنند ه ها روی فعالیت کاتالیزورهای زیگلر-ناتا و خواص نهایی پلیمر در پلیمرشدن اولفین ها [PDF]

Baspārish, 2015
فعالیت کاتالیزور از مهم ترین پارامترها در فرایندهای پلیمرشدن است. برای یک سامانه کاتالیزوریفعالیت ممکن است به شرایط پلیمرشدن از قبیل دما و فشار وابسته باشد.
رضا بازوند, نعیمه بحری, مهدی نکومنش, حسین عابدینی   +3 more
doaj   +1 more source

Employing Moment Equations Model to Study the Effect of Different Active Centers on Homopolymerization Kinetics of Ethylene [PDF]

علوم و تکنولوژی پلیمر, 2008
Ethylene was homopolymerized over Ziegler-Natta catalyst and the homopolymerization was modeled using moment equations. Mechanism was modeled according to five different reaction centers of catalyst.
M. Salami-Kalajahi, M. Najafi, V. Haddadi-Asl, S.M. Ghafelebashi-Zarand   +3 more
doaj   +1 more source

Study of Ziegler-Natta /Metallocene Hybrid Catalyst on Pilot Device

, 2011
In this work, Ziegler-Natta/Metallocene hybrid catalyst (Z-M) was prepared magnifying. The activity and copolymerization behavior of the catalyst were evaluated through 10L model device.
Jun Ji Jia, Bo Chao Zhu, Jing Wang, Xiao Yan Liu, Xu Chen   +4 more
core   +1 more source

Copolymerization of Ethylene and Propylene Using 4th Generation Ziegler- Natta Catalyst: Influence of Cocatalyst, External Electron Donor and Hydrogen [PDF]

علوم و تکنولوژی پلیمر, 2007
Copolymerization of ethylene and propylene was investigated using a 4th generation phthalate Ziegler-Natta catalyst in normal hexane in a Buchi reactor.
R. Mehtarani, H. Arabi, M.B. Teymori, S.S. Hosseini shiraz, V. Eslami manesh   +4 more
doaj   +1 more source

Silanolytic Chain Transfer in Olefin Polymerization with Supported Single-Site Ziegler−Natta Catalysts

, 2016
Silanolytic Chain Transfer in Olefin Polymerization with Supported Single-Site Ziegler−Natta ...
Haruyuki Makio (1952404), Tobin J. Marks (1275348), Kwangmo Koo (3002130)   +2 more
core   +1 more source

Generation of Homogeneous (sp³-C₁)-Bridged Cp/Amido and Cp/Phosphido Group 4 Metal Ziegler−Natta Catalyst Systems

, 2016
Generation of Homogeneous (sp3-C1)-Bridged Cp/Amido and Cp/Phosphido Group 4 Metal Ziegler−Natta Catalyst ...
Klaus Kunz (2720305), Gerhard Erker (1443580), Steve Döring (2720311), Roland Fröhlich (2430502), Gerald Kehr (1443583)   +4 more
core   +1 more source

Acetylene Semi‐Hydrogenation by Photocatalysis

Angewandte Chemie, Volume 138, Issue 40, 28 September 2026.
Photocatalytic acetylene semi‐hydrogenation is an emerging light‐driven route to polymer‐grade ethylene, offering a mild alternative to energy‐intensive thermocatalysis. By replacing H2 co‐feed with water or other proton sources, these systems can achieve high selectivity under ambient conditions.
Anna Fortunato, Brando Adranno, Sharon Silloni, Marianna Barbieri, Claudia Masia, Francesca Arcudi, Luka Đorđević   +6 more
wiley   +2 more sources

Electrified Acetylene Removal From Ethylene Streams Enabled by Facet‐Engineered Cu–TiO2 Interfaces

Angewandte Chemie International Edition, EarlyView.
Facet‐engineered interfaces enable selective electrochemical acetylene removal from ethylene streams. Dispersed Cu nanoclusters on the titania {001} facet suppress hydrogen and coupling byproducts, while stabilizing key hydrogenation intermediates.
Aocheng Hu, Zhen Liu, Laichun Zhao, Rui Guo, Qinjian Luo, Bufeng Zhang, Shuaijun Pan   +6 more
wiley   +1 more source

Synthesis of polyethylene/exfoliated MoS₂ nanocomposites by in situ exfoliation polymerization using Ziegler–Natta catalyst intercalated MoS₂

, 2017
A new synthetic route for polyethylene (PE)/exfoliated MoS2 (EMoS2) nanocomposites using novel Ziegler–Natta catalyst intercalated MoS2 was designed.
He-Xin Zhang, Keun-Byoung Yoon, Hao Zhang   +2 more
core   +1 more source