Thiol-ene coupling of high oleic sunflower oil towards application in the modification of flexible polyurethane foams / Sylwia Dworakowska, Adrien Cornille, Dariusz Bogdal, Bernard Boutevin, Sylvain Caillol ... więcej

Thiol-ene coupling of high oleic sunflower oil towards application in the modification of flexible polyurethane foams / Sylwia Dworakowska, Adrien Cornille, Dariusz Bogdal, Bernard Boutevin, Sylvain Caillol // Materials [Dokument elektroniczny]. – 2022, Vol. 15, Iss. 2, 14 s. : rys., tab., wykr. – Tryb dostępu: https://www.mdpi.com/1996-1944/15/2/628. – Oznaczenie ref./art.: 628. – Bibliogr. 44 poz., Abstr. – doi: 10.3390/ma15020628. – ISSN 1996-1944

High oleic sunflower oil-based polyol was obtained by thiol-ene coupling and applied in the preparation of flexible polyurethane foams. The photochemically initiated thiol-ene click reaction was carried ... więcej

High oleic sunflower oil-based polyol was obtained by thiol-ene coupling and applied in the preparation of flexible polyurethane foams. The photochemically initiated thiol-ene click reaction was carried out under UV irradiation using 2-mercaptoethanol. Bio-based polyol with hydroxyl value of 201.4 mg KOH/g was used as 30 wt% substituent of petrochemical polyether polyol in the formulations of flexible foams. Both reference foams, as well as foams modified with bio-based polyol, were formulated to have various isocyanate indices (0.85, 0.95, 1.05). Flexible foams were compared in terms of their thermomechanical properties and analyzed using FT-IR and SEM microscopy. Modification with bio-based polyol resulted in foams with superior compression properties, higher support factor, and lower resilience than reference foams. TGA and FT-IR curves confirmed the presence of urethane/urea and ether linkages in the polyurethane matrix. Moreover, double glass transition temperature corresponding to soft and hard segments of polyurethane was observed by DSC proving the phase-separated morphology.