动态键度对玻璃制剂的机械性能的影响
Harsh Pandya1, Fardin Khabaz1,2
1School of Polymer Science and Polymer Engineering, The University of Akron, Akron, OH, 44325, USA.
Chemical communications (Cambridge, England)
|September 2, 2024
概括
具有动态共价键的混合玻璃体具有增强的机械性能. 动态键度的变化改善了应力松,延迟了狂热的发展,并增加了这些先进的聚合物网络的拉伸.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 计算材料科学科学 计算材料科学
背景情况:
- 玻璃聚合物是一种独特的聚合物类别,它结合了动态共价键与永久交叉链.
- 这些动态键使得拓重新排列,从而产生自我愈合和可回收性等特性.
- 了解动态键度如何影响宏观行为对于设计先进材料至关重要.
研究的目的:
- 研究不同动态键度对混合玻璃体网络机械性能的影响.
- 分析压力放松行为和变形下的狂热发展.
- 为了比较混合玻璃仪与永久交联网络的性能.
主要方法:
- 利用分子模拟来建模混合玻璃体网络.
- 进行三轴拉伸测试以评估宏观性质.
- 系统地改变了网络内的动态共价键的度.
主要成果:
- 混合玻璃体表现出由于动态共价键的持续应力放松.
- 动态键的存在延迟了拉伸过程中狂热的发展.
- 与永久交叉连接的对应方相比,具有动态债券的网络表现出更高的拉伸能力.
- 成功地证明了玻璃玻璃网络在变形过程中放松拉伸应力的能力.
结论:
- 动态共价键是实现玻璃制剂增强机械性能的关键.
- 定制动态键度为控制应力放松和变形行为提供了一条途径.
- 混合玻璃为需要强大的机械性能和应力消散的应用提供了一个有前途的材料类.
相关概念视频
01:12Bonding and Strength of Aggregate
143
The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...
143
01:17Mortar Properties
117
Mortar properties encompass a range of characteristics crucial for construction and masonry work, including workability, water retention, bond strength, durability, compressive strength, volume change, and appearance. Workability refers to mortar's ability to be easily applied and manipulated without sagging or falling off surfaces, which is important for efficient masonry unit placement and alignment. Water retention is essential to prevent the mortar from losing moisture too quickly to...
117