Effect of Metastable Liquid−Liquid Demixing on the Morphology of Nucleated Polymer Crystals
Effect of Metastable Liquid−Liquid Demixing on the Morphology of Nucleated Polymer Crystals
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DOI：
10.1021/ma049581t
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发表时间：
2004-05
期刊：
影响因子：
5.5
通讯作者：
Wenbing Hu;D. Frenkel
中科院分区：
文献类型：
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作者：
Wenbing Hu;D. Frenkel
根据经典成核理论，这种核的形成速率与形成新相临界核所需的自由能成本成指数关系。这种自由能成本可以通过在临界点附近发生的过渡前涨落的存在而受到另一相变附近的影响。事实上，模拟和理论表明，晶体成核的速率可以通过与（亚稳）临界点的存在相关的密度波动的存在来增强。
According to classical nucle-ation theory, the rate at which such nuclei form dependsexponentially on the free energy cost needed to form acritical nucleus of the new phase. This free energy costcan be influenced by the vicinity of another phasetransition through the presence of pretransitional fluc-tuations that occur near a critical point. In fact, simula-tions and theory suggest that the rate of crystalnucleation can be enhanced by the presence of densityfluctuations associated with the presence of a (meta-stable) critical point.