Synthesis of glycerin carbonate-based intermediates using thiol-ene chemistry and isocyanate free polyhydroxyurethanes therefromReportar como inadecuado




Synthesis of glycerin carbonate-based intermediates using thiol-ene chemistry and isocyanate free polyhydroxyurethanes therefrom - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

* Corresponding author 1 ICG ICMMM - Institut Charles Gerhardt - Institut de Chimie Moléculaire et des Matériaux de Montpellier 2 LCPO - Laboratoire de Chimie des Polymères Organiques 3 TEAM 1 LCPO

Abstract : A new synthesis of 4-prop-2-en-1-yloxymethyl-1,3-dioxolan-2-one AGC was performed by Williamson ether synthesis from 4-hydroxymethyl-1,3-dioxolan-2-one. Dicyclocarbonates were synthesized by UV thiol-ene coupling of allyl-cyclocarbonate with a 2,20-oxydiethanethiol. This photochemical thiol-ene reaction was carried out under air, with neither solvent nor photoinitiator. The products, obtained with high yield, were characterized by 1H NMR and FTIR analysis. The synthesized dicyclocarbonates were used without purification to synthesize polyhydroxyurethanes without isocyanate by step growth polyaddition with 1,10-diaminodecane. The synthesized polyhydroxyurethanes were characterized by 1H NMR, FTIR, ATG and DSC analysis. These polyhydroxyurethanes exhibited glass transition temperatures from -31°C to -14°C, molecular weight from 7,000 g-mol to 9000 g-mol and degradation temperature for 5% of weight loss Td 5% between 227°C and 250°C.

Keywords : biobased polymers non isocyanates polyurethanes thiol-ene





Autor: Sofia Benyahya - Myriam Desroches - Rémi Auvergne - Stéphane Carlotti - Sylvain Caillol - Bernard Boutevin -

Fuente: https://hal.archives-ouvertes.fr/



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