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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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Schlögl, Sandra
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (33/33 displayed)
- 2024Cationic UV-curing of bio-based epoxidized castor oil vitrimers with electrically conductive propertiescitations
- 2024Dual-vat photopolymerization 3D printing of vitrimerscitations
- 2024Reprocessable carbon fiber vitrimer composites: Reclamation and reformatting of carbon fibers for second generation composite materials
- 2024Rapid tooling for rubber extrusion molding by digital light processing 3D printing with dual curable vitrimerscitations
- 2024MetamaterialFindercitations
- 2024Redox cationic frontal polymerization: a rapid curing approach for carbon fiber-reinforced composites with high fiber contentcitations
- 2024Vitrimer Transition Phenomena from the Perspective of Thermal Volume Expansion and Shape (In)stabilitycitations
- 2024Design of Reversible Adhesives by Using a Triple Function of Ionic Liquidscitations
- 2023Accelerated Thermo-Catalytic Degradation of Perfluoropolyether (PFPE) Lubricants for Space Applicationscitations
- 2023Ti$_{40}$Zr$_{10}$Cu$_{36}$Pd$_{14}$ bulk metallic glass as oral implant materialcitations
- 2023Thermally Latent Bases in Dynamic Covalent Polymer Networks and their Emerging Applicationscitations
- 2023On‐Demand Activation of Transesterification by Chemical Amplification in Dynamic Thiol‐Ene Photopolymerscitations
- 2023Sustainable Bio-Based UV-Cured Epoxy Vitrimer from Castor Oilcitations
- 2023Redox cationic frontal polymerizationcitations
- 2023Ti40Zr10Cu36Pd14 bulk metallic glass as oral implant materialcitations
- 2022Influence of morphology and chemical surface composition on electrical conductivity of SiC microspherescitations
- 2022Asymmetric chiral and antichiral mechanical metamaterials with tunable Poisson's ratiocitations
- 2021High resolution additive manufacturing with acrylate based vitrimers using organic phosphates as transesterification catalystcitations
- 2021Structural Model for the Estimation of the Equivalent Permittivity of Nanodielectrics Based on Polyethylene and Epoxy Resins
- 2021Introduction of Photolatent Bases for Locally Controlling Dynamic Exchange Reactions in Thermo-Activated Vitrimerscitations
- 2021Investigating the influence of surface hardness and energy on the perceived stickiness of polymer coatings.
- 2021Role of Organic Phosphates and Phosphonates in Catalyzing Dynamic Exchange Reactions in Thiol-Click Vitrimerscitations
- 2021Functional mechanical metamaterial with independently tunable stiffness in the three spatial directionscitations
- 2020Tailored Interfaces in Fiber-Reinforced Elastomerscitations
- 2020Epoxy-anhydride vitrimers from aminoglycidyl resins with high glass transition temperature and efficient stress relaxationcitations
- 2020Design and characterisation of vitrimer-like elastomeric composites from HXNBR rubbercitations
- 2020Exploiting the Carbon and Oxa Michael Addition Reaction for the Synthesis of Yne Monomerscitations
- 2020Tribological characteristics of medical gloves in contact with human skin and skin equivalentscitations
- 2019Bonded aerospace repairs under tensile loading: Wet chemical surface treatment and selected environmental conditionscitations
- 2018Tailoring the interfaces in glass fiber-reinforced photopolymer compositescitations
- 2017Synthesis and evaluation of new radical photoinitiators bearing trialkoxysilyl groups for surface immobilizationcitations
- 2016Thiol-Ene versus Binary Thiol–Acrylate Chemistrycitations
- 2016Flexible epoxy based composites with enhanced delamination resistance
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document
Flexible epoxy based composites with enhanced delamination resistance
Abstract
<p>This work highlights new strategies for the preparation of flexible epoxy-silicone rubber laminates, which promote high delamination resistance of stator bar insulations. Silicone rubber based damping layers are placed within rigid layered insulating composite materials to reduce thermo-mechanical stresses that particularly arise during on-off operation of rotating machines. To provide a good adhesion and covalent bonding between the elastomer layer and the epoxy based matrix, mercapto functional organosilanes are immobilized onto the silicone rubber surface by a two-step modification route. The surface characteristics of the damping layers prior to and after the functionalization process are characterized by means of contact angle measurements and XPS spectroscopy. Model insulations with the flexible damping layer are prepared by vacuum pressure impregnation process and the influence of the damping layer on the thermo-mechanical properties such as storage modulus, glass transition temperature and bending strength is determined. It can be obtained, that the flexibility of the new composite materials can be increased significantly, whilst the glass transition temperature is not affected by the elastomer layer. In a further step, stator bar prototypes with modified elastomeric damping layers are manufactured on-site to evaluate the electrical performance and the delamination resistance. The results reveal that both high-voltage endurance as well as delamination resistance can be improved considerably by the incorporated flexible layers. However, the electrical properties including loss factor or partial discharge magnitude are not influenced. From the results it can be concluded that the employment of flexible layers offers an innovative approach towards the manufacture of high-voltage generators with extended life-time, as reliability and longevity of high-voltage generators are directly related to the delamination resistance of the insulating composites.</p>