| 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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Dandurand, Jany
Université Toulouse III - Paul Sabatier
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (27/27 displayed)
- 2022Continuous Bamboo Fibers/Fire-Retardant Polyamide 11: Dynamic Mechanical Behavior of the Biobased Compositecitations
- 2020Thermogravimetric study of the behaviour of organic and inorganic polymers contained in four dental resin-based compositescitations
- 2020Biophysical and lipidomic biomarkers of cardiac remodeling post-myocardial infarction in humanscitations
- 2019Thermal, mechanical and dielectric behaviour of poly(aryl ether ketone) with low melting temperaturecitations
- 2019Mechanical properties of continuous bamboo fiber-reinforced biobased polyamide 11 compositescitations
- 2018Dynamic relaxations in a bio-based polyamide with enhanced mechanical moduluscitations
- 2017Physical structure and mechanical properties of polyamide/bamboo compositescitations
- 2017Identification of ageing biomarkers in human dermis biopsies by thermal analysis (DSC) combined with Fourier transform infrared spectroscopy (FTIR/ATR).citations
- 2016Mechanical and thermal behaviour of bamboo flour-reinforced XLPE compositescitations
- 2015Polymerization study and rheological behavior of a RTM6 epoxy resin system during preprocessing stepcitations
- 2015New hybrid polymer nanocomposites for passive vibration damping by incorporation of carbon nanotubes and lead zirconate titanate particlescitations
- 2014Conformational and thermal characterization of a synthetic peptidic fragment inspired from human tropoelastin: Signature of the amyloid fiberscitations
- 2014Discontinuity of physical properties of carbon nanotube/polymer composites at the percolation thresholdcitations
- 2014Electrical and Piezoelectric Behavior of Polyamide/PZT/CNT Multifunctional Nanocompositescitations
- 2014Integrated piezoelectric function in a high thermostable thermoplastic PZT/PEEK compositecitations
- 2013Dielectric relaxations in PEEK by combined dynamic dielectric spectroscopy and thermally stimulated currentcitations
- 2011Dynamic mechanical properties of oral mucosa: comparison with polymeric soft denture liners.citations
- 2011Molecular mobility in piezoelectric hybrid nanocomposites with 0-3 connectivity: Particles size influencecitations
- 2011Molecular mobility in piezoelectric hybrid nanocomposites with 0–3 connectivity: Volume fraction influencecitations
- 2011Influence of hydrogen bonds on glass transition and dielectric relaxations of cellulosecitations
- 2010Dynamic mechanical behaviour of polyamide 11/Barium titanate ferroelectric compositescitations
- 2008Thermally stimulated current and dielectric relaxation of inorganic/organic ferroelectric nanocomposites
- 2007Dynamic Mechanical Properties of a Biomimetic Hydroxyapatite/Polyamide 6,9 Nanocompositecitations
- 2007Electroactive influence of ferroelectric nanofillers on polyamide 11 matrix propertiescitations
- 2006Thermo-mechanical analysis of dental silicone polymerscitations
- 2004TSC and Broadband Dielectric Spectroscopy Studies of the α Relaxation in Phosphorus-Containing Dendrimerscitations
- 2002Enthalpy Relaxation in Phosphorus-Containing Dendrimerscitations
Places of action
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article
Influence of hydrogen bonds on glass transition and dielectric relaxations of cellulose
Abstract
The molecular dynamics in hydrated cellulose has been investigated by a combination of thermal analyses and dielectric spectroscopy. Differential scanning calorimetry shows the dependence upon hydration of the glass transition temperature Tg. A physical ageing phenomenon has been observed. At the molecular scale, bound water is hydrogen bonded to polar sites of cellulose macromolecules. At the macroscopic scale, water molecules play the role of a plasticizer for cellulose lowering its Tg. Dynamic dielectric spectroscopy combined with thermostimulated currents have allowed us to follow more localized molecular mobility. The β relaxation mode is characterized by activation entropies that vanish for higher water contents indicating molecular mobility localization. It is plasticized by water like the glass transition. This analogy is explained by a common origin of both mechanisms: the mobility of the cellulose backbone. The evolution of the γ mode upon hydration follows an anti-compensation law. Water acts as an anti-plasticizer in a hydrogen bonded network.