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Oenothera biennis seed oil as an alternative raw material for production of bio-polyol for rigid polyurethane-polyisocyanurate foams

2018; Elsevier BV; Volume: 126; Linguagem: Inglês

10.1016/j.indcrop.2018.10.019

1872-633X

Joanna Paciorek‐Sadowska, Marcin Borowicz, B. Czupryński, Ewa Tomaszewska, Joanna Liszkowska,

Lignin and Wood Chemistry

The aim of this article is to discuss a process of obtaining a new bio-polyol based on an oil from Oenothera biennis seeds and 2,2′-mercaptodiethanol (2,2′-MDE) and its use for rigid polyurethane-polyisocyanurate (PUR-PIR) foams. The synthesis of the polyol was carried out with a two-step method. Firstly, the double bonds of unsaturated fatty acid residues were oxidized and subsequently the epoxide rings were opened by 2,2′-MDE. The properties of the obtained bio-polyol were examined for its use as a raw material for rigid polyurethane-polyisocyanurate foams, i.e. hydroxyl value, acid value, density, viscosity, pH, water content. Spectroscopic studies (FTIR, 1H NMR and 13C NMR) were also performed. Aforementioned studies confirmed the assumed chemical structure of the new polyol. The formulations of rigid foams containing from 0 to 0.3 mass equivalents of the new bio-polyol were arranged on the basis of obtained results. A significant impact of the new bio-polyol on functional properties of foams was noted: apparent density, compressive strength, brittleness, absorbability, water absorption and flammability. Modified foams had better functional properties than the reference foam.