Cis-1,4-Polybutadiene It?s rubber with a memory. This polymer?s chain of repeating units are cis-linked?connected on the same side of a carbon-carbon double bond. Once molded into a shape (like a ball), the material returns to that shape whenever it gets ...
Source: http://www.wired.com/gadgetlab/2013/05/fa_whatsinside/
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