Rigid polyurethane foam fabrication using medium chain glycerides of coconut oil and plastics from end-of-life vehicles

0495872 - ÚMCH 2019 DE eng J - Journal Article
Paruzel, Aleksandra - Michalowski, S. - Hodan, Jiří - Horák, Pavel - Prociak, A. - Beneš, Hynek
Rigid polyurethane foam fabrication using medium chain glycerides of coconut oil and plastics from end-of-life vehicles.
PU Magazine International. Roč. 15, č. 5 (2018), s. 540-551. ISSN 1864-5534
R&D Projects: GA MŠMT(CZ) 7AMB14PL021; GA MŠMT(CZ) LO1507
Keywords : chemical recycling * degradation * microwave irradiation
OECD category: Polymer science
https://www.gupta-verlag.com/magazines/pu-magazine-international/05-2018

Polycarbonate and polyurethane scraps from end-of-life vehicles were converted into liquid recycled polyols with hydroxyl number around 300 mgKOH·g-1 by using medium chain glycerides of coconut oil. The obtained polyols were used for preparation of low-density rigid polyurethane foams. It was found that up to 50 wt % of the virgin petrochemical polyol can be replaced by the recycled polyols without any negative effect on the foaming process. The obtained foams exhibited the apparent density of 40-44 kg·m-3, the homogeneous cellular structure with a high content of closed cells (>91 vol %) and the beneficially low value of lambda coefficient (~23 mW·m-1·K-1). The exceptionally high compressive strength (>350 kPa in parallel to foam rise direction) of the rigid PUR foams with 50 wt % of recycled polyol derived from polycarbonate scrap resulted probably from the unique structure of recycled polyol combining rigid aromatic segments together with flexible coconut oil glyceride units. In conclusion, this approach utilizing the renewable coconut oil-derived reagent provides a sustainable recycling solution for two major plastics from automotive waste.
Permanent Link: http://hdl.handle.net/11104/0289105