Effects of Surfactants on Mechanical and Thermal Properties of Soy-Based Polyurethane Foams
Polyurethane foams are widely used for insulation applications due to their high insulation properties as compared to conventional materials such as extruded polystyrene foam and mineral wool. In this study, soy-based polyurethane foams were prepared using five different surfactants while keeping other components such as soy-based polyol, diisocyanate, catalyst, and blowing agent (water) constant. Prepared samples were tested for mechanical and thermal properties to evaluate the effect of different surfactants used in varying quantities. The morphology of the foam samples was observed using a scanning electron microscope. Seventeen fold reduction in the cell size was observed with an increase in the amount of surfactant from 0.5 to 5.0 g. Samples with higher amounts of surfactant also exhibited a higher number of closed cells. Better thermal insulation was observed for samples with 2.0 and 5.0 g of surfactant as compared to samples with 0.5 g of surfactant. A similar trend was observed in the mechanical strength, moisture absorbance, and density of the fabricated foam samples.
G. S. Dhaliwal et al., "Effects of Surfactants on Mechanical and Thermal Properties of Soy-Based Polyurethane Foams," Journal of Cellular Plastics, SAGE Publications Ltd, Mar 2020.
The definitive version is available at https://doi.org/10.1177/0021955X20912200
Mechanical and Aerospace Engineering
Keywords and Phrases
Cell density; environmentally friendly blowing agent; polyurethane foams; structural foams; surface tension; surfactant
International Standard Serial Number (ISSN)
Article - Journal
© 2020 The Authors, All rights reserved.
12 Mar 2020