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Updated: Jul 12, 2025

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Molecular Entanglement and Electrospinnability of Biopolymers
Published on: September 3, 2014
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在稳定切割流下,纠的聚合物-聚合物接口上纠的双块共聚物的不平衡行为
Yedi Li1,2, Hongxia Guo1,2
1Beijing National Laboratory for Molecular Sciences, Joint Laboratory of Polymer Sciences and Materials, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
The journal of physical chemistry. B
|October 30, 2023
概括
在聚合物混合物中的界面共聚合物链在剪切流下表现出明显的滑动行为. 这些动态与纠网络的纠网络有关.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 计算化学计算化学
背景情况:
- 了解聚合物-聚合物接口对于材料特性至关重要.
- 接口滑动会影响宏观的流动行为.
- 在接口上的共聚物链动态在剪切下是复杂的.
研究的目的:
- 分析界面共聚合物链的滑动现象.
- 为了研究在快速剪切流下个体链的动态.
- 为了将接口强度和不兼容性与滑动行为相关联.
主要方法:
- 多维散射粒子动力学 (mDPD) 模拟.
- 对具有不同不兼容性的三元混合物 (A125/B125/C125D125) 的分析.
- 对滑动速度与界面剪切应力的检查.
主要成果:
- 观察了两个功率定律区域 (Vs ~ σ5到Vs ~ σ1),用于滑动速度与界面剪切应力.
- 这些区域对应于集成和不完整的接口纠网络.
- 链动力学从不规则的翻转转变为拉伸式线圈形状,不兼容性越来越大.
结论:
- 接口纠网络结构决定了滑动行为.
- 剪切诱导的解影响了滑动模式.
- 同聚合物链形状随着接口强度和不兼容性而显著变化.
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