Impact of natural oil-based recycled polyols on properties of cast polyurethanes

0499403 - ÚMCH 2019 RIV US eng J - Journal Article
Beneš, Hynek - Paruzel, Aleksandra - Hodan, Jiří - Trhlíková, Olga
Impact of natural oil-based recycled polyols on properties of cast polyurethanes.
Journal of Renewable Materials. Roč. 6, č. 7 (2018), s. 697-706. ISSN 2164-6325. E-ISSN 2164-6341
R&D Projects: GA MŠMT(CZ) LO1507
Institutional support: RVO:61389013
Keywords : bio-based * cast polyurethane * natural oil
OECD category: Polymer science
Impact factor: 1.427, year: 2018

In this study, castor oil, rapeseed oil and medium chain triglycerides of coconut oil, were transesterified by means of 2-ethyl-2-hydroxymethyl-1,3-propanediol (trimethylolpropane) and consequently used to convert polycarbonate waste from end-of-life vehicles into liquid polyols. The prepared recycled polyols, composed uniquely of renewable and recycled components, had a hydroxyl number of ca. 250 mg KOH·g–1. They were successfully applied as 100% replacement of a virgin polyol for preparation of solid crosslinked polyurethanes (PU) by solvent-free casting. The produced rigid cast PU exhibited the main transition temperature ranging from 44°C to 53°C, the hardness value from 46 to 61 Shore D and the beneficial low water absorption (0.4-0.5 wt.%). The PU network structure was highly influenced by the presence of aromatic structures of polycarbonate-units and fatty acid compositions. A suitable selection of natural oil thus enabled to adjust thermo-mechanical properties and promote excellent optical transparency of the produced PU.
Permanent Link: http://hdl.handle.net/11104/0294567