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New challenges in the synthesis of non-isocyanate polyurethanes

Abstract : Among all plastic materials, polyurethanes (PUs) represent the 6th most popularly usedpolymers in the World. They are industrially synthesized by the reaction between a diol and adiisocyanate, in the presence of a metal catalyst and an organic solvent. Nevertheless, thissynthesis presents important environmental and health problems. In order to replace thesetoxic compounds, advances in this field have led to a number of isocyanate-free processes.However, these processes have to face many challenges (physical properties, molarmasses, side reactions, etc.), in order to compete with conventional polyurethanes.Therefore, part of this manuscript is dedicated to a rational study of the influence oforganocatalysts, such as TBD or P4, not only on the polymerization kinetics of the aminolysisof bis-cyclic carbonates, but also on the structure and properties of the resulting PUs.Subsequently, and in order to limit the use of volatile organic compounds, aqueousdispersions of non-isocyanate PUs were obtained by adapting: 1) the acetone process to theaminolysis of bis-cyclic carbonates and 2) the interfacial polymerization to thepolycondensation of linear dicarbonates with diamines.
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Amaury Bossion. New challenges in the synthesis of non-isocyanate polyurethanes. Polymers. Université de Bordeaux; Universidad del País Vasco, 2018. English. ⟨NNT : 2018BORD0360⟩. ⟨tel-01998058⟩

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