Question

Generally, all substance expand on heating. Does rubber or plastic contract on heating. ​

Answer 1

Explanation:

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Answer 2

Answer:

Polymers like rubber shrink on heating as their molecular chains curl up, and water shrinks when warmed from its freezing point to around 4°C. After that, though, it behaves normally, and expands on warming. In contrast, so-called negative thermal expansion (NTE) materials never behave themselves.