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- W4313251322 endingPage "342" @default.
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- W4313251322 abstract "The importance of systematic and efficient recycling of all forms of plastic is no longer a matter for debate. Constituting the sixth most produced polymer family worldwide, polyurethanes, which are used in a broad variety of applications (buildings, electronics, adhesives, sealants, etc.), are particularly important to recycle. In this study, polyurethanes are selectively recycled to obtain high value-added molecules. It is demonstrated that depolymerization reactions performed with secondary amines selectively cleave the C-O bond of the urethane group, while primary amines unselectively break C-O and C-N bonds. The selective cleavage of C-O bonds, catalyzed by an acid:base mixture, led to the initial polyol and a functional diurea in several hours to a few minutes for both model polyurethanes and commercial polyurethane foams. Different secondary amines were employed as nucleophiles to synthesize a small library of diureas obtained in good to excellent yields. This study not only targets the recovery of the initial polyol but also aims to form new diureas which are useful building blocks for the polymerization of innovative materials." @default.
- W4313251322 created "2023-01-06" @default.
- W4313251322 creator A5004312101 @default.
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- W4313251322 date "2022-12-27" @default.
- W4313251322 modified "2023-10-16" @default.
- W4313251322 title "Upgrading Polyurethanes into Functional Ureas through the Asymmetric Chemical Deconstruction of Carbamates" @default.
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- W4313251322 doi "https://doi.org/10.1021/acssuschemeng.2c05647" @default.
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