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Imagine never having to change your tyre tubes after a puncture? What if your tube could mend itself if left alone for a few hours. Scientists have developed a new kind of rubber which can mend itself. This amazing property comes from the fact that they have done away completely with covalent and ionic bonding, and the rubber is held together by hydrogen bonding, which can be repaired.
http://technology.newscientist.com/article/dn13354
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