Results 71 to 80 of about 5,101 (224)

Effects of FeCl3 doping on the performance of MgCl2/TiCl4/DNPB catalyst in 1-hexene polymerization [PDF]

open access: yesPolyolefins Journal, 2017
The aim of this study was to examine the effect of catalyst doping on the performance of MgCl2. EtOH/TiCl4 catalyst system. In this regard, a series of undoped as well as FeCl3-doped catalysts was prepared and employed in 1-hexene polymerization.
Farshid Nouri-Ahangarani   +3 more
doaj   +1 more source

Developing Calibration Reference Materials and Standardized Protocols for Reliable DSC of Polyolefins

open access: yesJournal of Applied Polymer Science, Volume 143, Issue 3, January 15, 2026.
Standardized protocol for reducing T m standard deviation. ABSTRACT Differential scanning calorimetry (DSC) serves as a critical analytical tool in the polyolefin industry for quality control and product differentiation. Between 2000 and 2025, 7574 global patent applications referenced DSC data, highlighting its ubiquitous role in the industry.
Xingxing Zhang   +7 more
wiley   +1 more source

Understanding the activity and stability of Lewis acid-modified Ziegler–Natta catalysts for the sustainable production of polypropylene

open access: yesJournal of Taibah University for Science
Cleaner polymer production involves minimizing environmental impact by using efficient catalysts and eco-friendly synthesis methods. Identifying active and stable catalysts is essential.
Rafik Rajjak Shaikh   +3 more
doaj   +1 more source

Molecular Weight Distributions in Ideal Polymerization Reactors. An Introductory Review [PDF]

open access: yes, 2011
The ultimate aim of polymerization reaction engineering is the production of polymers with tailor-made properties. An introductory review into this field is presented, with emphasis on the effects on the molar mass distribution (MMD), of the sought ...
Meira, Gregorio Raul, Oliva, H.
core  

Molecular weight dependence and stereoselective chain cleavage during the early stages of the isotactic polypropylene pyrolysis [PDF]

open access: yes, 2017
The comparative study on the pyrolysis of two Polypropylene samples, with a similar high isotactic character but quite distinct molecular weights, reveals a significant difference in their thermal performances.
Benavente, Rosario   +2 more
core   +1 more source

Styrene Polymerization with Group III Metallocenes: A Generative and Interpretable Catalyst Design Strategy Combining Density Functional Theory and Machine Learning

open access: yesChemistryEurope, Volume 4, Issue 1, January 2026.
Machine‐learning methods are used to predict styrene binding energies and insertion barriers in a series of group III cationic catalysts. A generative algorithm based on these predicted data is provided to propose new catalysts. The rational design of group III metallocene catalysts for styrene polymerization remains a complex challenge due to ...
Stella Christodoulou   +3 more
wiley   +1 more source

Spacer groups in macromolecular structures [PDF]

open access: yes, 2010
Razmakne skupine bitna su odrednica strukture i svojstava funkcijskih polimera. Mnoga fi zička, kemijska i biološka svojstva znatno ovise o njihovoj veličini.
Ante JUKIĆ   +2 more
core   +2 more sources

Half-titanocene 5-t-butyl-2-(1-(arylimino)methyl)quinolin-8-olate chlorides: Synthesis, characterization and ethylene (co-) polymerization behavior [PDF]

open access: yes, 2013
A series of half-titanocene chloride complexes bearing 5-t-butyl-2-(1-(arylimino)methyl)quinolin-8-olate ligands (L), CpTiLCl₂, has been synthesized in acceptable yields by the stoichiometric reaction of CpTiCl₃ with the respective potassium 5-t-butyl-2-(
Chen, Langqiu   +5 more
core   +1 more source

Selective Semi‐Hydrogenation of Acetylene using a Single‐Atom Cobalt on Carbon Nitride Photocatalyst with Water as a Proton Source

open access: yesSmall Methods, Volume 10, Issue 2, 22 January 2026.
A sustainable alternative to the energy‐intensive traditional thermocatalytic hydrogenation of acetylene to ethylene is reported. The catalyst is a cobalt single‐atom catalyst supported on carbon nitride that is powered by visible light, uses water as a proton source and demonstrates high selectivity, stability, and recyclability.
Anna Fortunato   +8 more
wiley   +1 more source

Tha synthesis of syndiotactic polystyrene using monocyclopentadienyl titanium complexes [PDF]

open access: yes, 2008
Série čtyř nových halosilylsubstituovaných monocyklopentadienylových komplexů titanu [Si(CH3)2FCp]TiCl3 – FSiTTC, [Si(CH3)F2Cp]TiCl3 F2SiTTC, [Si(CH3)Cl2Cp]TiCl3 - Cl2SiTTC, [Si(CH3)2ClCp]TiCl3 - ClSiTTC byla po aktivaci methylalumoxanem testována jako ...
Svačina, Zdeněk
core  

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