| 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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Wolz, Daniel Sebastian
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2024Verfahren zur Herstellung eines CFC-Formkörpers mit hoher Steifigkeit und hoher Zugfestigkeit mittels endlos-3D-Druck einer prä-Kohlenstofffaser-verstärkten Matrix
- 2024Potentials of polyacrylonitrile substitution by lignin for continuous manufactured lignin/polyacrylonitrile-blend-based carbon fiberscitations
- 2023Thermomechanical modeling of the stabilization process for carbon fiber production
- 2023Influence of temperature and dose rate of e‐beam modification on electron‐induced changes in polyacrylonitrile fiberscitations
- 2022Advanced carbon reinforced concrete technologies for façade elements of nearly zero-energy buildingscitations
- 2019High density polyethylene-based microporous carbon fibers as high-performance cathode materials for Li S batteries
- 2018Reinforcement Systems for Carbon Concrete Composites Based on Low-Cost Carbon Fiberscitations
- 2017Probabilistically based defect analysis and structure-property-relations in CF
- 2016Thermal treatment of carbon fibres up to 2175 K and impact on carbon fibre and related polymer composite properties
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article
Influence of temperature and dose rate of e‐beam modification on electron‐induced changes in polyacrylonitrile fibers
Abstract
The present study investigates the influence of modification temperature and the dose rate of electron modification on the progress of these and the three important thermal induced reactions namely: cyclization, dehydrogenation and oxidation. Since electron induced chemical reactions strongly depend on the polymer chain segment mobility, temperatures below the glass transition temperature (Tg) and above Tg were tested. Electron Paramagnetic Resonance Spectroscopy (EPR) measurements showed the presence of alkyl-, peroxy- and polyimineradicals alongside each other. Gel measurements identified a temperature dependent crosslinking behavior at doses ≤ 150 kGy, but no dose rate depending on crosslinking. Changes in chemical structure were investigated using FT-IR, showing a dependency of stabilization behavior depending on dose and temperate more than on dose rate. TGA and DSC measurements complete the analyses by describing the behavior during further thermal treatments and measuring the residual mass at 800 ° C