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Towards Circular Economy: Different Strategies for Polyurethane Waste Recycling and the Obtaining of New Products

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Department of Graphical Expression and Project Management, School of Engineering, Gipuzkoa, Eibar Section, Otaola Hiribidea 29, 20600 Eibar, Spain
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Department of Chemical and Environmental Engineering, School of Engineering, Gipuzkoa, Plaza Europa 1, 20018 Donostia-San Sebastian, Spain
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Department of Graphical Expression and Project Management, School of Engineering, Gipuzkoa, Plaza Europa 1, 20018 Donostia-San Sebastian, Spain
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Author to whom correspondence should be addressed.
Presented at the 2nd International Research Conference on Sustainable Energy, Engineering, Materials and Environment (IRCSEEME), Mieres, Spain, 25–27 July 2018.
Proceedings 2018, 2(23), 1490; https://doi.org/10.3390/proceedings2231490
Published: 22 November 2018
As a consequence of the high production and simultaneous consumption of polyurethanes (PU) a great volume of PU waste is landfilled. In this scenario, suitable and efficient routes for PU waste recycling have been searched for many years. In this work two series of PUs using different recycled PU sources were synthesized: a thermoplastic PU series using a glycolysated polyol obtained from the glycolysis of elastomeric PU waste (chemical recycling) and a PU flexible foam series loaded with PU dust waste created in the shaping of PU surf tables (mechanical recycling). Results showed that the incorporation of recycled components in the formulation improved mechanical properties both in the case of thermoplastic polyurethanes and polyurethane foams. The optimum glycolysated polyol was fixed in 15% over the total polyol weight for thermoplastic PUs. In the case of foams, a maximum of 20% PU dust over the polyol weight was incorporated.
Keywords: polyurethane waste; chemical recycling; mechanical recycling; glycolysis; polyol; thermoplastic polyurethanes; polyurethane foams polyurethane waste; chemical recycling; mechanical recycling; glycolysis; polyol; thermoplastic polyurethanes; polyurethane foams
MDPI and ACS Style

Ugarte, L.; Calvo-Correas, T.; Gonzalez-Gurrutxaga, I.; Peña-Rodriguez, C.; Etxeberria, O.; Corcuera, M.A.; Eceiza, A. Towards Circular Economy: Different Strategies for Polyurethane Waste Recycling and the Obtaining of New Products. Proceedings 2018, 2, 1490.

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