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二元玻璃形成液体中的合作激活跳动力学:尺寸比,组成和粒子间相互作用的影响
Xiao-Juan Ma1,2, Rui Zhang1,2
1South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, South China University of Technology, Guangzhou 510640, China. rzhang1216@scut.edu.cn.
Soft matter
|June 15, 2023
概括
我们使用自相一致的合作跳跃理论 (SCCHT) 研究了二进制混合物的玻璃动力学. 结果揭示了粒子大小,组成和相互作用如何影响动态,对材料科学有影响.
科学领域:
- 软物质物理学 软物质物理学
- 材料科学 材料科学 材料科学
- 计算物理 计算物理
背景情况:
- 超冷液体中的玻璃动态对于理解材料特性至关重要.
- 混合系统表现出复杂的动态超出单个组件系统,相关的应用.
- 深度超冷的条件对于观察分子/聚合物混合物中的玻璃过渡至关重要.
研究的目的:
- 研究尺寸比,组成和粒子间相互作用对二进制球混合物的合作跳跃动态的影响.
- 为了分析超高压缩率下的动态,模拟深度超冷条件.
- 探索自相一致的合作跳跃理论 (SCCHT) 对混合动力学的预测能力.
主要方法:
- 自相一致的合作跳跃理论 (SCCHT) 的应用.
- 对具有各种参数 (尺寸比,组成,相互作用) 的二元球混合物的系统研究.
- 专注于模仿深度超冷状态的超高混合物包装分数.
主要成果:
- 矩阵粒子跳跃会产生显著的弹性屏障,这取决于混合因素.
- SCCHT预测有两个主要的动态模式:矩阵/透器共跳或更快的透器跳跃.
- 增加尺寸比或吸引力强度扩大了共跳制度;观察到具有强烈吸引力的"抗塑化".
结论:
- SCCHT提供了一个框架来理解复杂的合作跳跃在二进制混合物.
- 系统参数极大地影响了动态,提供了调整材料属性的路径.
- 这些发现对设计和理解基于聚合物的混合材料有影响.
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