Abstract
Replacing toxic isocyanates and petrobased reactants currently employed for polyurethane (PU) synthesis is nowadays a major concern. Among all possible routes to isocyanate-free PUs, aminolysis of ...
Highlights
Replacing toxic isocyanates and petro-based reactants currently employed for polyurethanes (PUs) synthesis is nowadays a major concern
Complete conversions of reactive carbonate functions were obtained in the case of Diglycerol dicarbonate (DGDC) and Seb-bCC-ester monomers, in short reaction times, without the need of excessive heating
Those mild conditions and the shorter reaction times prevent the formation of by-products, as no urea was created with DGDC and very low amounts of urea and amide were detected in the case of Seb-bCC-ester based PHUs
Summary
Replacing toxic isocyanates and petro-based reactants currently employed for polyurethanes (PUs) synthesis is nowadays a major concern. In order to overcome the rather low reactivity of 5CCs, the introduction of functional groups exhibiting a withdrawing electronic effect in alpha or beta position of the carbonate ring is reported to increase its reactivity towards aminolysis These so-called ‘activated carbonates’, first developed by Tomita et al.[27], were investigated by many research groups.[28,29,30,31] In this course, we recently designed biscarbonates from fatty acid substrates bearing either ether, ester or thio-ester linkages, in beta position of the carbonate ring.[29]. An important consequence of these polymerization features is generally the formation of relatively low molar mass PHUs.[12,32,33] All these limitations are preventing the CC / amine route to NIPUs to be competitive with the current industrial PU process and still requires improvements that we aim at addressing in this work
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