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Showing 1 to 20 of 117 for “"PEEK"”.
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Melt Spinning of the Fine PEEK Filaments
… speed. The high performance thermoplastic PEEK is solidified in the melt spinning process in a small distance and short time. Therefore, the fine PEEK filaments in the fibre formation zone underwent a high deformation and cooling rate. To make the melt spinning process stable and to produce …
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The Crystallization of Polyetheretherketone (Peek) From the Glass
… history on the morphology and kinetics of PEEK crystallized from the glassy state have been investigated. Amorphous PEEK crystallized as aggregates of microcrystals when annealed at temperatures ranging from 145$\sp\circ$C to 200$\sp\circ$C. Heterogeneous nuclei remained in the melt, with …
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Fatigue behavior of drilled T300/PEEK laminated composites
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Materials Science and Engineering, 1993
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The Design Modelling of PEEK Composite for Bone Implants
… integrity of Hip and Femur Implants through PEEK Composite and FDM Techniques. Examines using polyether-ether-ketone (PEEK) materials for improved bone implantation. While PEEK materials offer benefits such as non-toxicity, high strength, and toughness, they often fall short in replicating …
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ASPECTS OF RECYCLING OF CARBON FIBRE REINFORCED POLYETHERETHERKETONE (CF/PEEK)
… carbon fibre reinforced polyetheretherketone (CF/PEEK) composite, as it is an expensive material worth recycling. In its virgin form, CF/PEEK has excellent mechanical properties. Thus it is hoped that even after recycling, the extent of degradation to its mechanical properties will still be …
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Sneak-peek: high speed covert channels in data center networks
With the advent of big data, modern businesses face an increasing need to store and process large volumes of sensitive customer information on the cloud. In these environments, resources are shared across a multitude of mutually untrusting tenants increasing propensity for data leakage. With the …
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Investigation of the Fire Behaviour of PEEK-based Polymers and Compounds
Polyetheretherketone (PEEK) is a polymer with outstanding performance, particularly concerning temperature resistance, chemical resistance and mechanical characteristics. Literature shows a gap in the knowledge with regards to PEEK flammability and decomposition products. The aim of this thesis is …
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The crystallisation of Poly (aryl ether etherketone) (PEEK) and its carbon fibre composites
… reprocessing). Poly aryl ether ether ketone (PEEK) is a semi-crystalline, high-performance engineering polymer whose properties can be enhanced through fibre reinforcement. The properties of PEEK and its composites are sensitive to changes in the crystalline content and morphology, which are …
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The Effect of Substrate Parameters on the Morphology of Thermally Sprayed PEEK Splats
… and temperature has on the morphology of PEEK single splats on aluminium substrates. PEEK single splats were deposited by HVAF and plasma spraying on aluminium substrates with 6 different pretreatments. Substrates were either sprayed at room temperature, or 323°C, and a subset of …
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Adhesion study of thermoplastic polyimides with Ti-6Al-4V alloy and PEEK-graphite composites
… bond strength with poly(arylene ether ketone) PEEK®-graphite composites. Oxygen or ammonia gas plasma treatment was very effective in further improving adhesive bond strength of melt laminated PEEK®-graphite composites.
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The fabrication of carbon-fiber composites by aqueous suspension prepregging with larc-tpi and peek
… consolidation cycle was designed for PEEK prepreg. Two thermoplastic polymers were studied : LaRC-TPI, provided by Mitsui Toatsu Chemicals, and Poly(etheretherketone), synthesized in Virginia Tech Chemistry Department. Comparison of LaRC-TPI composites to those made at NASA-Langley …
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Evaluación in-vitro de Cr-PEEK como biomaterial alternativo a los materiales tradicionales en implantología dental
… zirconia (Zr), and polyetheretherketone (PEEK), each offering distinct physicochemical and biological properties. The present thesis investigates and compares the biological and functional properties of three candidate implant biomaterials—commercially pure titanium, yttria-stabilised …
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Infrared microscope studies of surface temperatures produced by friction with graphite-epoxy and carbon-PEEK composites
… at the interfaces of graphite-epoxy and carbon-PEEK composites in unidirectional sliding contact with sapphire. Effects of fiber orientation and velocity on tribological parameters were examined. Oscillating contact conditions with graphite-epoxy were also examined. Surface temperatures on the …
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The effects of manufacturing on the structural integrity of Gr/PEEK composite parts by Thomas Ackley Wilson.
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1990.
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Time Dependent Properties of Semicrystalline Poly(Arylene Ether Ether Ketone) (Peek) Above and Below the Glass Transition
Long time annealing of semicrystalline PEEK above the glass transition results in the observation of several time dependent phenomena - "physical aging", "secondary crystallization", "multiple melting" of lamellae with different thermal stability etc. Their interrelation - common origin and …
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The effect of loading frequency and loading level on the fatigue behavior of angle-ply carbon/PEEK thermoplastic composites
… behavior of ($\rm{\pm}45\rbrack\sb{4s}$ carbon/PEEK composite was investigated. Tention-tention load controlled fatigue tests were performed on straight sided samples using a 100-KN MTS machine. Three loading frequencies (1Hz, 5Hz, and 10Hz) and three load levels (60%$\rm\sigma\sb{ult.}$, …
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Morphology-Property Relationships in Semicrystalline Aerogels of Poly(ether ether ketone)
… gelation of poly(ether ether ketone) (PEEK) in dichloroacetic acid (DCA) and 4-chlorophenol (4CP) were constructed over broad temperature and concentration ranges, revealing that PEEK is capable of dissolving and forming gels in DCA and 4CP up to a weight fraction of 25 wt.%. Highly …
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Effect of intermediate solvents on poly(ether ether ketone)
The interaction between poly(ether ether ketone) (PEEK) and three solvents (i.e., methylene chloride, tetrahydrofuran, and acetone) was studied by means of several complementary techniques. A series of eleven 0.3 mm thick PEEK films was produced. Each film had a certain crystallinity index and …
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Process-morphology-property Relationships in Strut-like Poly(ether ether ketone) Aerogels Prepared through Thermally Induced Phase Separation
Poly(ether ether ketone) (PEEK) aerogels resulting from gelation in 1,3-diphenyl acetone (DPA) were prepared for the first time. The phase separation mechanism was determined to be solid-liquid phase separation which resulted in the formation of aerogels consisting of crystalline axialites. These …
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