This suggests that the self-stiffening is not the result of chemical changes in the polymer, which can usually be undone by heat.
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.
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。
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