一些电池是基于一些可逆的化学反应。
Some batteries are based on an underlying chemical reaction that can be reversed.
这说明材料强度提高并不是聚合物发生化学反应造成的，一般这种变化在加热状态下是可逆的。
This suggests that the self-stiffening is not the result of chemical changes in the polymer, which can usually be undone by heat.
受热后发生不可逆化学反应，当再次受热不会成为液态的粉末涂料。
A powder coating designed to undergo an irreversible chemical change during heating and will not revert to the liquid stage when reheated.
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