Physical Properties of Polyurethanes Produced from Polyols from Seed Oils: II. Foams

Abstract

Rigid polyurethane (PU) foams were prepared using three North American seed oil starting materials. Polyol with terminal primary hydroxyl groups synthesized from canola oil by ozonolysis and hydrogenation based technology, commercially available soybean based polyol and crude castor oil were reacted with aromatic diphenylmethane diisocyanate to prepare the foams. Their physical and thermal properties were studied and compared using dynamic mechanical analysis and thermogravimetric analysis techniques, and their cellular structures were investigated by scanning electron microscope. The chemical diversity of the starting materials allowed the evaluation of the effect of dangling chain on the properties of the foams. The reactivity of soybean oil-derived polyols and of unrefined crude castor oil were found to be lower than that of the canola based polyol as shown by their processing parameters (cream, rising and gel times) and FTIR. Canola-PU foam demonstrated better compressive properties than Soybean-PU foam but less than Castor-PU foam. The differences in performance were found to be related to the differences in the number and position of OH-groups and dangling chains in the starting materials, and to the differences in cellular structure.

Characterization of Thermal and Mechanical Properties of Lignosulfonate- and Hydrolyzed Lignosulfonate-based Polyurethane Foams

“…The pathways for conversion of vegetable oils into polyols for rigid and flexible foams were widely discussed by Petrović (2008). Narine et al (2007) report canola, soybean, and castor oils as the raw materials for rigid PUR foams. Foams based on vegetable and animal oil-derived polyols were also investigated (Beneš et al 2012;Das et al 2009).…”

Physical Properties of Polyurethane Plastic Sheets Produced from Polyols from Canola Oil

“…15,16 This first generation of polyols was not suitable to produce PUR plastics due to their relatively high acidity content. Recently, we have improved the technology and optimized the process and produced a new generation of polyols from canola oil with lower acidity and hydroxyl number close to what is theoretically achievable.…”

Preparation of novel magnetic polyurethane foam nanocomposites by using core-shell nanoparticles

“…The ATR spectra of groups have not completely reacted [22] . Finally, the bands at 2889 and 2976 Cm -1 are assigned to the asymmetrical C-H stretching and symmetrical stretching of polyether groups in the aliphatic chains, respectively [23,24] .…”