Results 81 to 90 of about 5,506 (175)

Allylsilylcyclopentadienyl Group 4 metal complexes: synthesis, structure and reactivity [PDF]

, 2003
(Allyldimethyl)silyl-substituted cyclopentadiene C5H5SiMe2(CH2CH /CH2) (1) and indene C9H7 /1-SiMe2(CH2CH /CH2) (2)\ud were synthesized by reaction of SiMe2(CH2CH /CH2)Cl with NaC5H5 or LiC9H7, respectively. Metallation of 1 with n-BuLi and\ud TlOEt gave
Cano Sierra, Jesús, Gómez Sal, Ma Pilar, Heinz, Georg, Martínez Martínez, Gema, Royo Gracia, Pascual   +4 more
core   +3 more sources

Epoxidised Natural Rubber (ENR)/Wollastonite Composites for Tyre Inner Liners: A Practical Replacement for Butyl Rubber in Industrial Applications

Polymer Engineering &Science, Volume 66, Issue 2, Page 1153-1169, February 2026.
Replacing butyl rubber with ENR+Wollastonite in tyre inner‐liners. ABSTRACT This study aimed to develop epoxidised natural rubber (ENR)‐based rubber compound formulations as an alternative to butyl rubber for tyre inner liners. The effects of different vulcanization systems, designed to achieve similar curing behavior in NR‐based carcass compounds and ...
Tuba Ünügül Yavuz, Abdussalam Essa, Ronak Janani, Bağdagül Karaağaç, Christopher Sammon   +4 more
wiley   +1 more source

Fe-Mediated Nitrogen Fixation with a Metallocene Mediator: Exploring pK_a Effects and Demonstrating Electrocatalysis [PDF]

, 2018
Substrate selectivity in reductive multi-electron/proton catalysis with small molecules such as N_2, CO_2, and O_2 is a major challenge for catalyst design, especially where the competing hydrogen evolution reaction (HER) is thermodynamically and ...
Chalkley, Matthew J., Del Castillo, Trevor J., Matson, Benjamin D., Peters, Jonas C.   +3 more
core   +1 more source

Advancing Single‐Walled Carbon Nanotubes toward Next‐Generation Electronic Materials: The Critical Roles of Purity and Processability

Small Methods, Volume 10, Issue 4, 23 February 2026.
Single‐walled carbon nanotubes (SWNTs) are promising for a wide range of applications. In particular, their exceptional electrical conductivity positions them as potential alternatives to traditional metal conductors. This review identifies the key mechanisms governing their conductivity within composites and proposes practical pathways for translating
Xiao Yu, Alex Adronov
wiley   +1 more source

Polyethylene Melt Rupture and Slip in Simple Shear: A Visual and Mechanistic Study

Journal of Applied Polymer Science, Volume 143, Issue 3, January 15, 2026.
Slip velocity transient curve (left) with images of the specimen at different times during a simple shear experiment. On the right, schematics illustrate the sample and its side view before and after simple shear. ABSTRACT Melt rupture of a bimodal molecular weight distribution polyethylene is studied under simple shear via flow visualization ...
Mohammadali Sattari, Y. W. Inn, Paula M. Wood‐Adams   +2 more
wiley   +1 more source

Copolymerization of 4-methyl-1-pentene with α,ω-alkenols

eXPRESS Polymer Letters, 2016
Copolymerization of 4-methyl-1-pentene (4M1P) with 9-decen-1-ol (9D1O) or 4-penten-1-ol (4P1O) was conducted by using metallocene catalysts. The activity could be improved under the higher polymerization temperature. The dyad distribution of poly(4M1P-co-
W. Wang, L. Hou, J. Sheng, M. Ren, Y. Tang   +4 more
doaj   +1 more source

Fragmentable Heterogeneous Cocatalysts for the Metallocene-Catalyzed Polymerization of Olefins, II [1]. Preparation, Characterization and Testing of the Cocatalysts and Microscopic Evaluation of the Polyethylene [PDF]

, 2005
Surface modified silica were reacted with different aluminiumalkyls AlR2R’ (R = Me, Et, i-Bu, R’ = H, Me, Et, i-Bu), oligomeric methylaluminoxane (MAO) and combinations of both, to yield heterogeneous cocatalysts.
Lange, Katharina C. H., Schumann, Herbert, Wassermann, Birgit C., Widmaier, Ralf   +3 more
core   +1 more source

TEMPO in Solution, Melted, Solid, and Adsorbed on a Silica Surface: A Paramagnetic NMR Study

Chemistry – A European Journal, Volume 32, Issue 1, 2 January 2026.
Paramagnetic species can often be measured with EPR and NMR spectroscopy. This is demonstrated using the important radical TEMPO. All 1H and 13C NMR signals of TEMPO could be recorded and assigned. The impact of TEMPO on the chemical shifts of solvent signals and a phosphine is described.
Ehsan Shakeri, Gabrielle E. Harmon‐Welch, Sara A. C. MacWade, Vladimir I. Bakhmutov, Janet Blümel   +4 more
wiley   +1 more source

Mechanical Properties of Polyethylene-Carbon Nanotube Composites Synthesized by In Situ Polymerization Using Metallocene Catalysts

Advances in Materials Science and Engineering, 2018
The influence of multiwalled carbon nanotubes (MWCNTs) on the properties of polyethylene prepared by in situ polymerization using metallocene catalyst (Cp2ZrCl2) in combination with methylaluminoxane has been studied.
Mamdouh A. Al-Harthi, Bijal Kottukkal Bahuleyan   +1 more
doaj   +1 more source

Propylene Polymerization Catalyzed by Metallocene/Methylaluminoxane Systems on Rice Husk Ash

Molecules, 2019
Silica generated from agricultural waste is more cost effective and environmentally friendly than silica from traditional commercial processes. In this study, spherical silica particles with a diameter of around 120 nm were fabricated from rice husk ash (
Kuo-Tseng Li, Cheng-Ni Yang
doaj   +1 more source