why do elastic material on clothes get crunchy when it gets old?
In: Chemistry
Rubber and stuff has chemicals and compounds it it that help make it stretchy. These can either evaporate over time, or solidify if not streched. As an example, the moon Rover the astronauts used has wire mesh wheels because in hard vaccum rubber would just turn hard and brittle immediately.
http://www.collectspace.com/news/news-120508a.html
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