| 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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Suliga, Agnieszka
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (8/8 displayed)
- 2024Physical and mechanical properties of nano-modified polybenzoxazine nanocomposite laminates: Pre-flight tests before exposure to low Earth orbit
- 2023Coatings Made by Atomic Layer Deposition for the Protection of Materials from Atomic Oxygen in Space
- 2020Development of Cycloaliphatic Epoxy-POSS Nanocomposite Matrices with Enhanced Resistance to Atomic Oxygencitations
- 2018Cycloaliphatic epoxy-based hybrid nanocomposites reinforced with POSS or nanosilica for improved environmental stability in low Earth orbitcitations
- 2018Analysis of atomic oxygen and ultraviolet exposure effects on cycloaliphatic epoxy resins reinforced with octa-functional POSScitations
- 2017Analysis of atomic oxygen and ultraviolet exposure effects on cycloaliphatic epoxy resins reinforced with octa-functional POSScitations
- 2017Improved thermal stability of cycloaliphatic epoxy resins by incorporation of OCTA-functional poss
- 2016Life Span Modelling of Ultra-Thin CFRP Mast Subjected to Accelerated Environmental Ageing
Places of action
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document
Improved thermal stability of cycloaliphatic epoxy resins by incorporation of OCTA-functional poss
Abstract
Carbon fibre reinforced polymer (CFRP) composites employing epoxy matrices have been recently used in a number of space applications, especially in structural components of spacecraft in low Earth orbit (LEO). However, in this region, CFRP structures are subjected to degradation by highly energetic ultraviolet radiation. Aromatic epoxies, which are commonly used, contain rigid phenyl rings, which confer higher mechanical properties and thermal stability, but these structural moieties absorb UV radiation strongly. In contrast, fully saturated cycloaliphatic epoxy resins are better suited for outdoor exposures, since they are poor chromophores with lower intensity UV absorption. In this work, we report on incorporation of an octa-functional polyhedral oligomeric silsesquioxane (POSS) reagent into a cycloaliphatic epoxy and discuss the influence of this hybridization on the thermal-degradation mechanism. POSS has been added in various concentrations of 5, 10, 15 and 20 wt. % and the cycloaliphatic epoxy was cured with either an anhydride or a cycloaliphatic diamine. The thermal and thermomechanical properties of each cured polymer were evaluated using thermogravimetric analysis (TGA) and dynamic mechanical analysis (DMA). The findings of this study contribute to development of advanced polymer matrix materials for extreme operation environments, such as LEO.