Results 61 to 70 of about 2,167 (208)

Overcoming Challenges in 3D Printing of Polyolefins and Their Composites: A Review on Strategies for Improved Printability and Performance

open access: yesPolymer Engineering &Science, Volume 66, Issue 5, Page 3100-3141, May 2026.
This review integrates the molecular fundamentals, key challenges, and mitigation strategies in polyolefin 3D printing, focusing on shrinkage, warpage, and adhesion control. It highlights material design approaches using recycled polyolefins and functional fillers to improve printability, mechanical properties, and sustainability in additive ...
Malik Hassan   +5 more
wiley   +1 more source

The effect of different prepared TiCl4-MgCl2 catalysts on the behavior of gas-phase ethylene/1-hexene copolymerization

open access: yesSouth African Journal of Chemical Engineering, 2023
The effect of different prepared magnesium sources including MgCl2 (ZN-THF), metallic magnesium powder (ZN-O), and MGE (ZN-MGE) as the support of titanium-based Ziegler-Natta catalysts on behaviors of gas-phase ethylene/1-hexene copolymerization was ...
Thanyaporn Pongchan   +5 more
doaj   +1 more source

Transition metal imido compounds as Ziegler-Natta olefin polymerisation catalysts

open access: yes, 2005
Transition metal imido compounds having the general formula [(L) nM(NR)] [where (L) n is a supporting ligand or ligand set, and R typically is alkyl or aryl] have been known for nearly 50 years, and ...
Bolton, PD   +4 more
core   +1 more source

Structure-property relations of heterophasic ethylene-propylene copolymers based on a single-site catalyst

open access: yeseXPRESS Polymer Letters, 2017
The target of the present study was to investigate the structure-property relationships of heterophasic ethylenepropylene (EP) copolymers based on a single-site (metallocene) catalyst (SSC) supported with an emulsion technology developed by Borealis. The
M. Aarnio-Winterhof   +3 more
doaj   +1 more source

Ziegler-Natta catalysts for propylene polymerization – Interaction of an external donor with the catalyst [PDF]

open access: yesPolyolefins Journal, 2016
The interaction of the external donor (propyltrimethoxysilane - PTMS) with titanium-magnesium catalysts (TMCs) containing dibutylphthalate (DBP) as internal donor, which were prepared in different ways, was studied by chemical analysis and infrared ...
Valentina Panchenko   +2 more
doaj   +1 more source

On the Bona Fide Sampling of Reaction Candidates in Red Moon Method by Replica‐Exchange Molecular Dynamics Method: REMD‐RM Method and Its Efficacy in Polymerization and Cross‐Linking Reactions of Polypropylene

open access: yesJournal of Computational Chemistry, Volume 47, Issue 7, March 15, 2026.
Schematic representation of the REMD‐RM method, which integrates the Red Moon (RM) method and the replica‐exchange molecular dynamics (REMD) method. By enhancing molecular reconfiguration and diffusion in the reactant system, the REMD‐RM method can efficiently explore a wide phase space and effectively accelerate the search for reaction candidates ...
Kentaro Matsumoto   +4 more
wiley   +1 more source

MgCl2 Support Preparation Techniques and Their Effects on Ziegler-Natta Catalysts Performance in Propylene Polymerization [PDF]

open access: yesعلوم و تکنولوژی پلیمر, 2013
A primary adduct of MgCl2.3.3EtOH (A0) was prepared by melt quenching and then it was further dealcoholated by thermal and chemical methods. In thermal dealcoholation, two different support samples with MgCl2.2.7EtOH (A1) and MgCl2.1.8EtOH (A2) formulas ...
Najmeh Hadian   +3 more
doaj   +1 more source

Olefin Polymerizations Oriented by Rational Designs of Group‐13 Compounds

open access: yesThe Chemical Record, Volume 26, Issue 3, March 2026.
In coordination olefin polymerization chemistry, boron and aluminum compounds play important roles in both catalyst components and monomers. This personal account introduces our recent progress on the development of catalyst systems featured by the design of group‐13 counteranions, as well as the application of boronic acid‐crosslinked polyolefins to ...
Ryo Tanaka, Yu Zou
wiley   +1 more source

Insight into the Synthesis Process of an Industrial Ziegler–Natta Catalyst [PDF]

open access: yesIndustrial & Engineering Chemistry Research, 2018
Industrial & Engineering Chemistry Research, 58 (2)
Antoine Klaue   +5 more
openaire   +3 more sources

Quality control for Ziegler-Natta catalysis via spectroscopic fingerprinting [PDF]

open access: yes, 2018
Commercial olefin polymerization catalysts are typically produced at a manufacturing site before transport to production facilities for storage and eventual use.
Vantomme, Aurélien   +5 more
core   +1 more source

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