| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Vuorinen, Jyrki E.
University of Vaasa
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (30/30 displayed)
- 2020Development in additive methods in aramid fiber surface modification to increase fiber-matrix adhesioncitations
- 2020The effect of substrate pre-treatment on durability of rubber-stainless steel adhesioncitations
- 2018Effect of surfactant type and sonication energy on the electrical conductivity properties of nanocellulose-CNT nanocomposite filmscitations
- 2018Improved electromechanical response in acrylic rubber by different carbon-based fillerscitations
- 2018Temperature scanning stress relaxation of an autonomous self-healing elastomer containing non-covalent reversible network junctionscitations
- 2018Further enhancement of mechanical properties of conducting rubber composites based on multiwalled carbon nanotubes and Nitrile Rubber by solvent treatmentcitations
- 2018Characterization of elastic constants of anisotropic composites in compression using digital image correlationcitations
- 2018Mechanical, thermal, and burning properties of viscose fabric compositescitations
- 2017Automated high-throughput microbond tester for interfacial shear strength studies
- 2017The effect of matrix type on ageing of thick vinyl ester glass-fibre-reinforced laminatescitations
- 2017The effect of multi-wall carbon nanotube morphology on electrical and mechanical properties of polyurethane nanocompositescitations
- 2017The Effect of Ultrasonic Dispersion on the Surface Chemistry of Carbon Nanotubes in the Jeffamine D-230 Polyetheramine Mediumcitations
- 2017Erosive wear of filled vinylester composites in water and acidic media at elevated temperaturecitations
- 2017Vegetable fillers for electric stimuli responsive elastomerscitations
- 2017Microwave induced hierarchical nanostructures on aramid fibers and their influence on adhesion properties in a rubber matrixcitations
- 2017Minimization of losses in natural rubber films for dielectric energy harvesters
- 2016The effect of ultrasonic dispersion on the surface chemistry of carbon nanotubes in the Jeffamine D-230 polyetheramine mediumcitations
- 2016Erosion–corrosion resistance of various stainless steel grades in high-temperature sulfuric acid solutioncitations
- 2016Improvement of actuation performance of dielectric elastomers by barium titanate and carbon black fillerscitations
- 2016Influence of multiwalled carbon nanotubes on the processing behavior of epoxy powder compositions and on the mechanical properties of their fiber reinforced compositescitations
- 2016Composites of high-temperature thermomechanical pulps and polylactic acidcitations
- 2016The influence of high-temperature sulfuric acid solution ageing on the properties of laminated vinyl-ester jointscitations
- 2016Failure analysis of a leaching reactor made of glass-fiber reinforced plasticcitations
- 2016Evaluation of mechanical and dynamic mechanical properties of multiwalled carbon nanotube-based ethylene–propylene copolymer composites mixed by masterbatch dilutioncitations
- 2016Detergent impurity effect on recycled HDPEcitations
- 2015Erosive wear of various stainless steel grades used as impeller blade materials in high temperature aqueous slurrycitations
- 2015Interface modification of glass fibre-polyester composite-composite joints using peel pliescitations
- 2015Characterization of thermally aged polyetheretherketone fibrescitations
- 2015Photoelastic Stress Evaluation and Mechanical Testing of Hybrids
- 2014Stretching of solution processed carbon nanotube and graphene nanocomposite films on rubber substratescitations
Places of action
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article
Characterization of thermally aged polyetheretherketone fibres
Abstract
<p>This paper investigates the effects of thermal degradation on polyetheretherketone (PEEK) fibres. PEEK samples were aged at a constant temperature of 250 °C for 1-128 days and characterized with mechanical tests, FTIR (Fourier Transform Infrared Spectroscopy), DSC (Differential Scanning Calorimetry), rheology, TGA (Thermogravimetric Analysis), SEM (Scanning Electron Microscopy), and UV-Vis diffuse reflectance spectroscopy. The short-term thermal annealing had a positive effect on the mechanical properties, due to the formation and growth of secondary crystals. Crosslinking in the material was verified by rheological inspections. The crosslinking increased the mechanical strength and modulus but reduced the elongation at break of the fibres. FTIR tests showed that carbonyl and hydroxyl groups were slowly formed on the surface of the fibres while ring opening reactions took place. The thermal ageing reduced the thermal stability of PEEK. The decreased stability was observed in the decomposition onset temperature after 8 d and in the melting point and the glass transition temperature after 32 d. The first signs of degradation, crosslinking, embrittlement, and reduced thermal stability, were visible roughly after 8 d of ageing, whereas the deterioration in general usability occurred after 64 d.</p>