A theoretical interpretation of free volume at glass transition
A theoretical interpretation of free volume at glass transition
复制标题
玻璃化转变自由体积的理论解释
DOI：
10.1007/s10118-017-1968-8
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发表时间：
2017-05
影响因子：
4.3
通讯作者：
Li Liang-bin
中科院分区：
文献类型：
--
作者：
Ren Yi-kun;Li Yun-tao;Li Liang-bin
We device a relaxed lattice model (RLM) to study the mechanism of glass transition, which unifies the cageeffects from particle-particle interaction and entropy. By analyzing entropy in RLM with considering the influence of interactions on equilibrium, we demonstrate that glass transition is a second-order phase transition. For a perfect one-dimensional linked particle system like linear polymer under normal pressure, the free volume at glass transition is rigorously deduced out to be 2.6%, which provides a theoretical basis for the iso-free volume of 2.5% given by Willian, Landel and Ferry (WLF) equation. Extending to system with dead particles linked with higher dimensions like branched or cross-linked chains under positive or negative pressure, free volume at glass transition is varied, based on which we construct a phase diagram of glass transition in the space of free volume-dead particle-pressure. This demonstrates that free volume is not the single parameter determining glass transition, while either dead particles like cross-linked points or external force fields like pressure can vary free volume at the glass transition.
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影响因子：
2.8
作者：
S. Corezzi;S. Capaccioli;R. Casalini;D. Fioretto;M. Paluch;P. Rolla
通讯作者：
S. Corezzi;S. Capaccioli;R. Casalini;D. Fioretto;M. Paluch;P. Rolla
影响因子：
3.2
作者：
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通讯作者：
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影响因子：
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作者：
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影响因子：
3.2
作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
Angell, CA