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Grdadolnik, Maja; Zdovc, Blaž; Drinčić, Ana; Onder, Ozgun Can; Utroša, Petra; Ramos, Susana Garcia; Ramos, Enrique Dominguez; Pahovnik, David; Žagar, Ema
ACS sustainable chemistry & engineering, 07/2023, Volume: 11, Issue: 29Journal Article
Polyurethane foams (PUFs) are widely used commodity materials, but most of them end up in landfills at the end of their life, which is not in line with the circular economy approach. Here, we introduce microwave-assisted aminolysis with amine reagents that contain primary and tertiary amino groups in the structure. These reagents enable complete degradation of the urethane groups in the structure of the flexible PUFs with a much lower amount of degradation reagent than is typically required for solvolysis reactions. The purified, recovered polyols are close equivalents to the corresponding virgin polyols in terms of their structural and molar mass characteristics. Therefore, they can be used for the production of high-quality PUFs without having to adapt the synthesis process. The flexible PUFs made from recovered polyols have comparable mechanical properties to those made from virgin polyols.
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