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Belgacem C.,Laboratoire des Substances Naturelles LR02INRAP10 | Medimagh R.,Laboratoire des Substances Naturelles LR02INRAP10 | Kricheldorf H.,University of Hamburg | Ben Romdhane H.,Tunis el Manar University | Chatti S.,CNRS Institute of Analytical Sciences
Designed Monomers and Polymers | Year: 2016

The synthesis of biosourced copolyethersulfones by polycondensation of 1,4:3,6-dianhydrohexitol monomers and bisphenol A is reported. Structures and properties of these copolymers were investigated in each case. In the first part, the impact of the position of the two hydroxyl groups of isosorbide, isomannide, and isoidide is discussed. In the second part, we focused on improving the cost/thermal properties balance by introducing controlled proportions of bisphenol A as comonomer. The addition of bisphenol A serves two purposes. The first one is to maintain good thermal and mechanical properties of resulting copolymers. The second reason is to insure low-cost route to copolyethersulfones for a potential use in industrial applications. All the products have been fully characterized by NMR spectroscopy, MALDI-TOF spectrometry, and viscosimetry. The thermal properties were studied by differential scanning calorimetry (DSC). © 2016 Taylor & Francis. Source


Belgacem C.,Laboratoire des Substances Naturelles LR02INRAP10 | Medimagh R.,Laboratoire des Substances Naturelles LR02INRAP10 | Fildier A.,CNRS Institute of Analytical Sciences | Bulete A.,CNRS Institute of Analytical Sciences | And 3 more authors.
Designed Monomers and Polymers | Year: 2015

Functionalization of bio-based oligomers is a relevant approach in order to allow these materials to replace more conventional and nonbiodegradable polymers in a wider range of applications. This article will report on the hydroxylation of isosorbide-based ethersulfone oligomers. The hydroxy end-group was controlled by the variation of polycondensation parameters. Comparative study was conducted to assess the effect of isosorbide excess and the monomer concentration on structural composition and molecular weights of produced oligomers. Depending on reaction conditions, various products were synthesized, mainly α,ω-dihydroxyethersulfone oligomers. The characterization of the synthesized polyethersulfone was demonstrated by MALDI-TOF, NMR spectroscopy, differential scanning calorimetry, and size exclusion chromatography. © 2014 Taylor & Francis. Source

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