Results 71 to 80 of about 6,290 (219)

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

open access: yesPolymer Engineering &Science, EarlyView.
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

Influência da estrutura do catalisador a base de Zirconoceno na estereorregularidade e propriedades do polipropileno formado Influence of Zirconocene structure on polypropylene stereorregularity and properties

open access: yesPolímeros, 1997
RESUMO: Catalisadores de metalocenos com diferentes simetrias, cocatalisados por metilaluminoxanas (MAO), foram avaliados em diferentes temperaturas de polimerização do propileno.
Mário R. Meneghetti   +2 more
doaj   +1 more source

A novel n‐type dimer dopant for semiconducting polymers

open access: yesPolymer International, EarlyView.
A novel molecular n‐type dopant (1) with superior capacity to dope conjugated polymers is introduced. After charge transfer the product (2) remains in the polymer. Abstract Efficient and stable doping of organic semiconductors is crucial for adjusting their electrical properties.
Andreas Opitz   +4 more
wiley   +1 more source

Analysis of the Continuous Feeding of Catalyst Particles during the Growth of Vertically Aligned Carbon Nanotubes by Aerosol-Assisted CCVD

open access: yesNanomaterials, 2022
Aerosol-assisted catalytic chemical vapor deposition (AACCVD) is a powerful one-step process to produce vertically aligned carbon nanotubes (VACNTs), characterized by the continuous supply of the catalyst precursor (metallocene). The behavior of catalyst
Celia Castro   +5 more
doaj   +1 more source

Anti-cancer Action of Metal Complexes: Electron Transfer and Oxidative Stress? [PDF]

open access: yes, 1988
Evidence is presented in support of an electron transfer mechanism for various metal complexes possessing anti-neoplastic properties. Cyclic voltammetry was performed on several metallocenes, bis(acetato)bis(imidazole)Cu(II), and coordination compounds ...
Ames, James R.   +3 more
core   +1 more source

On Phosphatitanacycles

open access: yesZeitschrift für anorganische und allgemeine Chemie, EarlyView.
Titanocene phosphinidenes react with terminal alkynes in formal [2 + 2] cycloadditions to give unsaturated [C2PTi] metallcycles. Diphosphene complexes in combination with aryl‐substituted alkynes react similarly to provide metallacyclopentenes. Titanocene‐phosphinidene and diphosphanediide (or diphosphene) complexes Cp2Ti(PMe3)PMesTer and Cp2Ti(P2Ar2) (
Andrey Petrov   +1 more
wiley   +1 more source

Harnessing Toluene Solvent as a Reactant: Regioselective Benzyl Radical Addition to Multi‐π 1,5‐Enynes in a Copper‐Catalyzed Cascade to Indenes

open access: yesChemistry – A European Journal, Volume 32, Issue 14, 15 April 2026.
A copper‐catalyzed three‐component radical cascade of 1,5‐enynes with toluene and benzoic acids enables regioselective benzyl radical addition to multi‐Π systems, efficiently delivering polysubstituted indenes from an abundant solvent feedstock. ABSTRACT C─H activation of toluene generates a benzyl radical that undergoes C─C coupling, converting an ...
Saideh Rajai‐Daryasarei   +7 more
wiley   +1 more source

«Host-guest» complexing of double-walled carbon nanotube with metallocenes

open access: yesХімія, фізика та технологія поверхні, 2016
Complex compounds of various types and nature have been widely applied in many fields of science and technology. Complex aggregates based on nanostructures such as nanotubes and other coordination compounds, for example, metallocenes, have unique ...
O. V. Mykhailenko
doaj   +1 more source

Morphology control of clay-mineral particles as supports for metallocene catalysts in propylene polymerization [PDF]

open access: yesPolyolefins Journal, 2016
Spray dry granulation of clay minerals was studied to obtain clay mineral base support material for metallocene supported olefin polymerization catalysts.
Takao Tayano   +5 more
doaj   +1 more source

Electrochemistry in supercritical fluids

open access: yes, 2015
A wide range of supercritical fluids (SCFs) have been studied as solvents for electrochemistry with carbon dioxide and hydrofluorocarbons (HFCs) being the most extensively studied.
Bartlett, Philip N., Branch, Jack A.
core   +1 more source

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