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Your search keyword '"Emilie Choppe"' showing total 2 results
Start Over Author "Emilie Choppe" Topic 0104 chemical sciences
2 results on '"Emilie Choppe"'

1. Polynorbornene‐ g ‐poly(ethylene oxide) Through the Combination of ROMP and Nitroxide Radical Coupling Reactions

Author

Wenhao Zhang, Emilie Choppe, Laurent Fontaine, Véronique Montembault, Clémence Nicolas, Institut des Molécules et Matériaux du Mans (IMMM), and Le Mans Université (UM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Polymers and Plastics, 010405 organic chemistry, Chemistry, [CHIM.ORGA]Chemical Sciences/Organic chemistry, Oxide, ROMP, 010402 general chemistry, 01 natural sciences, Nitroxide radical, Coupling reaction, 0104 chemical sciences, 3. Good health, chemistry.chemical_compound, [CHIM.POLY]Chemical Sciences/Polymers, Polymer chemistry, Materials Chemistry, Ring-opening metathesis polymerisation, Physical and Theoretical Chemistry, ComputingMilieux_MISCELLANEOUS, Poly ethylene
Abstract

International audience

Published
2020
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2. Synthesis and characterization of elastomeric, biobased, nonisocyanate polyurethane from natural rubber

Author

Emilie Choppe, Pamela Pasetto, Wannarat Panwiriyarat, Jean-François Pilard, Arnaud Nourry, Varaporn Tanrattanakul, Ruedee Jaratrotkamjorn, Institut des Molécules et Matériaux du Mans (IMMM), Le Mans Université (UM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Bioplastic Research Unit, Department of Materials Science and Technology, Faculty of Science, and Prince of Songkla University (PSU)

Subjects
Thermogravimetric analysis, Materials science, Polymers and Plastics, 02 engineering and technology, 010402 general chemistry, Elastomer, 01 natural sciences, Catalysis, chemistry.chemical_compound, Differential scanning calorimetry, Natural rubber, Polymer chemistry, Materials Chemistry, Organic chemistry, Reactivity (chemistry), ComputingMilieux_MISCELLANEOUS, Polyurethane, [CHIM.ORGA]Chemical Sciences/Organic chemistry, General Chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Surfaces, Coatings and Films, Solvent, chemistry, visual_art, visual_art.visual_art_medium, 0210 nano-technology
Abstract

Linear and crosslinked polyhydroxyurethanes (PHUs) based on natural rubber (NR) were synthesized by a polyaddition reaction without a solvent or catalyst to exploit the reactivity of diamines or triamines with dicyclic carbonate groups. Oligo-isoprenes were obtained from the controlled oxidative degradation of NR and successive modifications of the chain ends. The syntheses of linear PHU were carried out with two approaches. The first one consisted of a reaction between amino telechelic oligo-isoprenes and aromatic or aliphatic dicyclic carbonates. The second approach proceeded through a reaction between oligo-isoprenes bearing cyclic carbonate chain ends and difunctional or trifunctional amines. The evolution of these reactions was studied by Fourier transform infrared spectrometry. The influence of the carbonate-to-amine molar ratio, the chain length of the oligo-isoprenes, and the reaction temperatures were investigated. The thermal properties of the PHUs were studied by differential scanning calorimetry and thermogravimetric analysis. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45427.

Published
2017
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