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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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Banc, Amélie
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (19/19 displayed)
- 2021Impact of the protein composition on the structure and viscoelasticity of polymer-like gluten gelscitations
- 2020Tailoring the viscoelasticity of polymer gels of gluten proteins through solvent qualitycitations
- 2019Phase separation dynamics of gluten protein mixturescitations
- 2018Nanoscale reversibility and non-linear effects in polymer nanocomposites under strain cycles
- 2017Chain structure of polymer nanocomposites using small-angle neutron scattering
- 2017Structure of chains and filler in polymer nanocomposites: impact of small beads and small molecules
- 2016Contrast matching gone wrong? Nanocomposites seen by SANS
- 2016Spontaneous gelation of wheat gluten proteins in a food grade solventcitations
- 2016Contrast-matching gone wrong? A study of polymer conformation in nanocomposites
- 2015Structure analysis by small-angle scattering of polymer nanocomposites: from model to industrial systems
- 2015Contrast-matching gone wrong? A study of polymer conformation in nanocomposites
- 2015Recent progress in polymer and filler structure in polymer nanocomposites
- 2015Origin of Small-Angle Scattering from Contrast-Matched Nanoparticles: A Study of Chain and Filler Structure in Polymer Nanocompositescitations
- 2015Chain signal in nanolatex based nanocomposites
- 2014Structure and rheology of model nanocomposites
- 2014Tuning Structure and Rheology of Silica–Latex Nanocomposites with the Molecular Weight of Matrix Chains: A Coupled SAXS–TEM–Simulation Approachcitations
- 2013Nanolatex based nanocomposites: control of the filler structure and reinforcement
- 2013Structuration and mechanical properties of gels made from gluten proteins
- 2011Reinforcement and Polymer Mobility in Silica–Latex Nanocomposites with Controlled Aggregationcitations
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article
Origin of Small-Angle Scattering from Contrast-Matched Nanoparticles: A Study of Chain and Filler Structure in Polymer Nanocomposites
Abstract
The conformation of poly(ethyl methacrylate) chains in silica-latex nanocomposites has been studied under zero average contrast conditions (ZAC) using small-angle neutron scattering (SANS). Samples have been prepared by drying colloidal suspensions of silica and polymer nanoparticles (NPs) followed by thermal annealing, for two different silica NPs (radius of 5 and 15 nm) and two chain molecular weights (17 and 100 kg/mol). By appropriate mixing of hydrogenated and deuterated polymer, chain scattering contrast is introduced, and in principle silica scattering suppressed. The silica structure consisting mostly of small fractal aggregates is characterized by transmission electron microscopy (TEM) and small-angle X-ray scattering (SAXS) on the same samples. The measurement of the chain structure by SANS, however, is perturbed by unwanted silica contributions, as often reported in the literature. Here, the contribution of contrast-matched silica is evidenced as a function of system parameters, namely chain mass, silica size, and volume fraction, and a model rationalizing these contributions for the first time is proposed. On the basis of a statistical analysis, a nanometer-thick polymer shell surrounding silica NPs is shown to create contrast, which is presumably maintained by the reduced mobility of polymer close to interfaces or attractive polymer silica interactions. This shell is proven to be quantitatively important only for the smallest silica NPs. Finally, the pure polymer scattering can be isolated, and the polymer radius of gyration is found to be independent of filler content and NP size.