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Wood adhesives from waste-free recycling depolymerisation of flexible polyurethane foams
Authors: Beran Rudolf | Zarybnicka Lucie | Machova Dita | Večeřa Miroslav | Kalenda Petr
Year: 2021
Type of publication: článek v odborném periodiku
Name of source: Journal of Cleaner Production
Publisher name: Elsevier Science
Place: Oxford
Page from-to: 127142
Titles:
Language Name Abstract Keywords
cze Lepidla na dřevo z bezodpadové depolymerace flexibilních polyuretanových pěn Tento článek se zabývá speciální technikou řízené depolymerizace studovaného FPUF. Byl depolymerizován v prostředí nereaktivní kapaliny při teplotě 130 °C, přičemž vznikly pouze kapalné produkty. Depolymerizační proces a konečný produkt byly charakterizovány titračními metodami, Fourierovou transformační infračervenou spektroskopií (FT-IR), plynovou chromatografií/hmotnostní spektrometrií (GC/MS) a gelovou permeační chromatografií (GPC). Recyklovaný polyol (produkt depolymerace) byl testován v modelových formulacích polyuretanového lepidla a hodnocen na pevnost v tahu na zkušebních kusech ze smrkového dřeva. flexibilní polyuretanové pěny; chemická recyklace; depolymerizace; formulace lepidla; dřevo
eng Wood adhesives from waste-free recycling depolymerisation of flexible polyurethane foams Flexible polyurethane foams (FPUF) are common plastic materials used in industry or consumer goods (heat and sound insulation, washing sponges, car seats). FPUF wastes are frequently taken to landfills and incineration, which causes environmental problems. The current method of physical recycling for rebound foams seems to be efficient, however, with limited usage in the structure of mattresses or construction insulations. Disadvantages of the current chemical recycling methods of FPUF consist of the slow reaction process, high energy consumption, and production of secondary waste by-products. This article deals with the special technique of the controlled depolymerisation of the studied FPUF. FPUF was depolymerised in an ambience of non-reactive liquid at a temperature of 130 degrees C, only giving liquid products. The depolymerisation process and the final product was characterised by titration methods, Fourier Transform-Infrared Spectroscopy (FT-IR), Gas Chromatography/Mass Spectrometry (GC/MS), and Gel Permeable Chromatography (GPC). The recycled polyol (product of depolymerisation) was tested in model polyurethane adhesive formulations and evaluated for shear tensile strength on spruce wood test pieces. (C) 2021 Elsevier Ltd. All rights reserved. Flexible polyurethane foams; Chemical recycling; Depolymerisation; Adhesive formulation; Wood

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