The students in Mr. Kane’s second grade class at Wilder Elementary learned about eco-friendly materials and how they can help us all go green. Mix two chemicals together and wait for the reaction. The chemicals produce a polymer called polyurethane foam. Polyfoam has a high R value and is used in furniture, packaging, insulation and floatation devices. Homebuilders spray the polyurethane into the walls of a house to give insulate against hot and cold weather. The lightweight foam expands to about 30 times its original liquid volume and becomes rigid.
For more information on making polyurethane foam and its uses, visit the experiment page. Steve Spangler Science does not sell or share the chemicals used in this experiment. For more information or to purchase it, call Flinn Scientific at 800-452-1261.