| 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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Magalhaes, Fd
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2020Experiment and modelling of the strain-rate-dependent response during in vitro degradation of PLA fibrescitations
- 2018Dynamic mechanical analysis and creep-recovery behavior of agglomerated corkcitations
- 2018Antimicrobial graphene nanoplatelets coatings for silicone catheterscitations
- 2014Evaluation of Bonding Performance of Amino Polymers Using ABEScitations
- 2014Physicomechanical characterization of monodisperse multivesiculated polyester particlescitations
- 2013Effect of incorporation of graphene oxide and graphene nanoplatelets on mechanical and gas permeability properties of poly(lactic acid) filmscitations
- 2013Dispersion of graphene nanoplatelets in poly(vinyl acetate) latex and effect on adhesive bond strengthcitations
- 2013Preparation and Characterization of Acrylic Polymer Nanocomposite Films Obtained from Aqueous Dispersionscitations
- 2012Synthesis and Characterization of Allyl Fatty Acid Derivatives as Reactive Coalescing Agents for Latexescitations
- 2011Evaluation of urea-formaldehyde adhesives performance by recently developed mechanical testscitations
- 2010A Study on the Colloidal Nature of Urea-Formaldehyde Resins and Its Relation with Adhesive Performancecitations
- 2006New trends on membrane science
Places of action
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article
Dynamic mechanical analysis and creep-recovery behavior of agglomerated cork
Abstract
The mechanical behavior of agglomerated cork, made of cork granules bound with polyurethane moisture-cured adhesive is investigated and compared to natural cork in the small strain regime (strain < 5%). Dynamic mechanical analysis (DMA) of the agglomerated material revealed two distinct thermal transitions, one at -45 A degrees C, related to the glass transition of polyurethane, and one at 3 A degrees C, associated with melting of suberin, a natural polyester that is the main component of cork's cell walls. Natural cork showed the latter transition to occur at a higher temperature range, between 10 and 25 A degrees C, probably due to a different crystalline arrangement being formed upon cooling the cork granules under pressure in the mold. The storage modulus of agglomerated cork was found to be similar to that of natural cork. Creep and recovery experiments were well described by Burgers model and Weibull distribution function, respectively. Agglomerated cork showed higher instantaneous creep strain and viscous flow than natural cork, probably due to relative displacement and slippage of the granules being allowed by the binder. In all cork materials, not all the instantaneous creep strain was instantaneously recovered. A fraction underwent delayed recovery and another turned into permanent strain. This behavior was associated with the deformation of corrugations in the cork cell walls. Cyclic creep-recovery tests showed for all cork materials recoveries above 90%, except for the first cycle.