Formation of Polyurethane Foam in Micro Gravity
This movie shows the foam being produced in micro gravity. The 2 thumbnail images summarize the content of the video. Click an image to see the image gallery.
In a reduced gravity environment polyurethane foam continues to climb out of the container.
p>This is described in the article "Chemical Interactions in a Reduced Gravity Environment" cited below. The following is quoted from this article.
"Our third experiment examined the formation of polyurethane foam during micro gravity. This was done by combining two liquids in a small container, mixing, and watching the differences in polymer foam formation resulting from differences in gravitational pull. In a 1-g environment the foam rises out of the container in a uniform fashion, forming a cup-cake-like shape around whatever container it is in. This formation was not observed in a reduced gravity environment. The foam did indeed rise out of the container, but continued to climb without falling or being pulled in any direction. The energy provided by the reaction provided the only directional push applied to the system."
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