在可挤出多相玻璃体中对界面应力放大和网络强化进行分子洞察
Jialiang Chen1, Shuangjian Yu2, Siwu Wu1
1Institute of Emergent Elastomers, Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China.
Langmuir : the ACS journal of surfaces and colloids
|February 26, 2025
概括
弹性体中的动态共价键 (DCB) 可实现上循环. 具有不同交叉连接的多相网络通过加强材料和放大界面应力来改善回收,这对于挤出再加工至关重要.
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:
- 动态共价键 (DCBs) 提供了一个回收热弹性体的上循环途径.
- 玻璃性弹性体中的多相网络提高了回收效率,但显微机制仍然不清楚.
研究的目的:
- 研究分子层面的机制,控制多相弹性体玻璃材料的再加工能力.
- 阐明网络结构和局部动态在挤出/注入再加工中的作用.
主要方法:
- 使用粗粒度分子动力学 (CGMD) 模拟.
- 一个模拟的多相网络的DCB交联弹性体被 subjected to模拟的拉力和剪切力.
主要成果:
- 具有不同交叉链密度的相域表现出明显的链段运动和应力/应变演变.
- 多相网络中的接口区域显示显著高的压力.
- 不同质的交叉连接导致网络强化和界面应力放大.
结论:
- 弹性玻璃体中的多相网络提供了分子水平的强化和界面应力放大,这对于再加工能力至关重要.
- 这项研究为这些材料的挤出/注射再加工能力提供了理论解释,指导了未来的网络设计.
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