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zhangwei章薇铁虫 (初入文坛)
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Furthermore, FC4 and FC8 solids are molten and then rapidly put into liquid N2, which should afford real amorphous states. It is shown that the quenched solids have thesame emission spectra as the ground or pressed samples (Fig. 6). These findings indicate that the transformation between the amorphous and crystalline states under various external stimuli is responsible for the reversible PFC behaviour. Further inspection of the DSC curves of the ground solids reveals that the cold-crystallization temperatures (Tcc) of the ground FCn solids decreases gradually with the length of N-alkyl chains (Fig. 5b and Table 1). Based on the decreased rate of Tcc from FC1 to FC8, the Tcc values of the ground FC10 and FC12 should be at or below room temperature. This implies that changing the length of the N-alkyl chains can significantly affect the Tcc of amorphous FCn solids. |
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zhangwei章薇: 金币+10, 翻译EPI+1 2014-10-13 10:06:49
zhangwei章薇: 金币+10, 翻译EPI+1 2014-10-13 10:06:49
| 此外，熔化FC4和FC8固体并迅速放入液氮，这样可提供真实的非晶状态。结果表明，该骤冷固体具有与研磨或受压样品相同的发射光谱（图6）。这些结果表明，在各种外部刺激作用下非晶体和晶体态之间的转变是PFC可逆行为的原因。进一步检查研磨固体DSC曲线显示，研磨FCN固体的冷结晶温度（Tcc为）随N-烷基链长度而逐渐减小（图5b及表1）。基于FC1至FC8该Tcc的降低速率，研磨FC10和FC12的Tcc值应等于或低于室温。这意味着，改变N-烷基链的长度可以显著影响非晶FCn固体的Tcc。 |
2楼2014-10-12 20:34:09