, 2023 The performance of isopropyl myristate, methyl trimethylacetate, and dibutyl sebacate (IPM, MTMA, and DBS respectively) as activity limiting agents (ALA) were evaluated using a post phthalate Ziegler Natta catalyst system...
Albeladi, Abdulrahman +5 more
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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 +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 +3 more
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Advantages of an Emulsion‐Produced Ziegler‐Natta Catalyst Over a Conventional Ziegler‐Natta Catalyst
Macromolecular Materials and Engineering, 2005 AbstractSummary: Self‐supported and MgCl2‐supported Ziegler‐Natta catalysts, produced by two catalyst synthesis methods are compared. Borealis Polymers OY (Finland), who supplied the catalysts, developed the catalyst synthesis methods. The first method (Method One) is based on an emulsion system and consists of an in situ single step preparation.
Mohammed Abboud +2 more
openaire +1 more source
Structural Characterization of Electron Donors in Ziegler–Natta Catalysts [PDF]
The Journal of Physical Chemistry C, 2018 Ziegler-Natta catalysis is a very important industrial process for the production of polyolefins. However, the catalysts are not well-understood at the molecular level. Yet, atomic-scale structural information is of pivotal importance for rational catalyst development.
E. S. Merijn Blaakmeer +5 more
openaire +5 more sources
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 +3 more
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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 +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 +4 more
doaj +1 more source
Design of stereoselective Ziegler–Natta propene polymerization catalysts [PDF]
Proceedings of the National Academy of Sciences, 2006 After five decades of largely serendipitous (albeit formidable) progress, catalyst design in Ziegler–Natta olefin polymerization, i.e., the rational implementation of new active species to target predetermined polyolefin architectures, has ultimately become a realistic ambition, thanks to a much deeper fundamental understanding and
BUSICO, VINCENZO +5 more
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The coordinative state of aluminium alkyls in Ziegler–Natta catalysts [PDF]
Physical Chemistry Chemical Physics, 2018 Multinuclear solid-state NMR provides insight in the interactions of aluminium alkyl based cocatalysts in MgCl 2 -supported Ziegler–Natta catalysts.
E. S. (Merijn) Blaakmeer +2 more
openaire +2 more sources