scholarly journals Thiol-Ene Coupling of High Oleic Sunflower Oil towards Application in the Modification of Flexible Polyurethane Foams

Materials ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 628
Author(s):  
Sylwia Dworakowska ◽  
Adrien Cornille ◽  
Dariusz Bogdal ◽  
Bernard Boutevin ◽  
Sylvain Caillol

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.

2019 ◽  
Vol 43 (3) ◽  
pp. e13879
Author(s):  
Ahmet Salih Sonmezdag ◽  
Songul Kesen ◽  
Asghar Amanpour ◽  
Gamze Guclu ◽  
Hasim Kelebek ◽  
...  

1996 ◽  
Vol 61 (1) ◽  
pp. 24-27 ◽  
Author(s):  
M-P. LIN ◽  
C.R. STAPLES ◽  
C.A. SIMS ◽  
S.F. O'KEEFE

2009 ◽  
Vol 43 (6) ◽  
pp. 2060-2065 ◽  
Author(s):  
L. A. Quinchia ◽  
M. A. Delgado ◽  
C. Valencia ◽  
J. M. Franco ◽  
C. Gallegos

2015 ◽  
Vol 166 ◽  
pp. 346-351 ◽  
Author(s):  
Claudia Belingheri ◽  
Barbara Giussani ◽  
Maria Teresa Rodriguez-Estrada ◽  
Antonio Ferrillo ◽  
Elena Vittadini

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