Results 41 to 50 of about 31,614 (246)

Rheological, mechanical and tribological properties of carbon-nanofibre reinforced poly (ether ether ketone) composites

Polímeros, 2003
Poly(ether ether ketone) nanocomposites containing vapour-grown carbon nanofibres (CNF) were produced using standard polymer processing techniques. At high shear rates no significant increase in resin viscosity was observed. Nevertheless, the addition of
Volker Altstaedt, Philipp Werner, Jan Sandler   +2 more
doaj   +1 more source

Total syntheses of conformationally-locked difluorinated pentopyranose analogues and a pentopyranosyl phosphate mimetic [PDF]

, 2007
Trifluoroethanol has been elaborated, via a telescoped sequence involving a metalated difluoroenol, a difluoroallylic alcohol, [2,3]-Wittig rearrangement, and ultimately an RCM reaction and requiring minimal intermediate purification, to a number of ...
Miles, Jonathan A. L., Mitchell, Lisa, Percy, Jonathan M., Singh, Kuldip, Uneyama, E.   +4 more
core   +1 more source

Hydrogen Atom Transfer Induces Photodegradation in Carbonyl‐Based Multi‐Resonance TADF Emitters

Angewandte Chemie, EarlyView.
Boosting triplet harvesting in N/C═O MR‐TADF emitters unexpectedly induces rapid photodegradation under oxygen‐free conditions. Spectroscopic studies reveal that triplet excited states trigger hydrogen‐atom transfer from solvent to the carbonyl unit, driven by triplet energetics and hydrogen electrophilicity.
Changfeng Si, Elvie F. P. Beaumont, Jenn Zi Yu Tan, Mitchell J. Demchuk, Zachary M. Hudson   +4 more
wiley   +2 more sources

Biomechanical Effect of Various Tibial Bearing Materials in Uni-Compartmental Knee Arthroplasty Using Finite Element Analysis

Applied Sciences, 2020
This paper aimed to evaluate the biomechanical effects of tibial bearing materials, from ultra-high-molecular-weight polyethylene (UHMWPE) to poly-ether-ether-ketone (PEEK) and carbon-fiber-reinforced poly-ether-ether-ketone (CFR-PEEK).
Yoon Hae Kwak, Hyoung-Taek Hong, Yong-Gon Koh, Kyoung-Tak Kang   +3 more
doaj   +1 more source

Sulphonated Poly Ether Ether Ketone/Aminodiphenylsilandiol Composite Electrolyte for PEM Fuel Cells [PDF]

, 2012
A composite polymeric membrane to be used as electrolyte in polymer electrolyte membrane fuel cells has been prepared and characterized. The membrane is composed of an acidic polymer, sulfonated polyetheretherketone, and of basic filler, amino ...
Adjemian, Aricò, Baranov, Botavy, D'Epifanio, Di Vona, Furniss, Hickner, Hickner, Hinokuma, Iwahara, Kerres, Kerres, Kobayashi, Li, Licoccia, Licoccia, Luo, Marani, Mark, Mauritz, Mecheri, Mikhailenko, Robertson, Rozière, Ruichun, Xing, Zaidi, Zawodzinski, Zhe   +29 more
core   +1 more source

Enhancement of the Mechanical Properties of Hydroxyapatite/Sulphonated Poly Ether Ether Ketone Treated Layer for Orthopaedic and Dental Implant Application

International Journal of Biomaterials, 2018
The mechanical properties of coated layers are one of the important factors for the long-term success of orthopeadic and dental implants. In this study, the mechanical properties of the porous coated layer were examined via scratch and nanoindentation ...
Roohollah Sharifi, Davood Almasi, Izman Bin Sudin, Mohammed Rafiq Abdul Kadir, Ladan Jamshidy, Seyed Mojtaba Amiri, Hamid Reza Mozaffari, Maliheh Sadeghi, Fatemeh Roozbahani, Nida Iqbal   +9 more
doaj   +1 more source

Sulfonated poly(ether ether ketone)/hydroxyapatite membrane as biomaterials: process evaluation

Polímeros, 2019
Poly(ether ether ketone) (PEEK) has excellent properties, such as high biocompatibility and an elastic modulus similar to bone, which makes it a suitable biomaterial.
Cristiane Agra Pimentel, José William de Lima Souza, Flávia Suzany Ferreira dos Santos, Mayelli Dantas de Sá, Valéria Pereira Ferreira, Gislaine Bezerra de Carvalho Barreto, José Filipe Bacalhau Rodrigues, Wladymyr Jefferson Bacalhau de Sousa, Cláudio Orestes Britto Filho, Francisco Kegenaldo Alves de Sousa, Marcus Vinicius Lia Fook   +10 more
doaj   +1 more source

Dual‐Interface‐Dominant Cathode Architectures Enabling Fast Sulfur Redox and Stable Interfaces in All‐Solid‐State Li‐S Batteries

Advanced Functional Materials, EarlyView.
An optimized carbon host nanostructure enables a dual‐interface‐dominant architecture in sulfur cathodes of solid‐state Li‐S batteries by selectively forming sulfur|carbon and sulfur|solid electrolyte interfaces. This tailored interfacial configuration accelerates sulfur redox kinetics by establishing enriched Li+/e– transport networks, while ...
Zhao Yang, Yuxiao Zhang, Yihong Liu, Geng Xie, Yu Dou, Jeremy Dawkins, Lijia Liu, Yixiang Wang, Lingzi Sang, Mohsen Shakouri, Sixu Deng, Karim Zaghib, Tsun‐Kong Sham, Xia Li   +13 more
wiley   +1 more source

Molecular fractionation with poly(ether ether ketone) hollow fibers

Advanced Membranes
Sustainable and efficient separation technologies are essential for minimizing the environmental impact of the chemical and pharmaceutical industries. Membranes with stability in solvents and precise molecular separation are needed.
Banan Alhazmi, Lakshmeesha Upadhyaya, Shanshan Hong, Gergo Ignacz, Radosław Górecki, Maik Tepper, Hannah Roth, Matthias Wessling, Gyorgy Szekely, Suzana P. Nunes   +9 more
doaj   +1 more source

Low dielectric fluorinated poly(phenylene ether ketone) film and coating [PDF]

, 1990
The present invention relates to film and coating materials prepared from novel fluorinated poly(phenylene ether ketones). A fluorinated poly(phenylene ether ketone) is prepared by reacting a bisphenol with 1,1,1,3,3,3 hexafluoro-2,2-bis 4-(4-halobenzoyl)
Cassidy, Patrick E., St.clair, Anne K., Tullos, Gordon L.   +2 more
core   +1 more source