一个集团丰富的粘弹性模型,用于具有许多悬挂链的高阻尼性玻璃体
Yan Li1, Haibo Feng1, Jing Xiong1
1State Key Laboratory of Intelligent Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Materials (Basel, Switzerland)
|October 26, 2024
概括
一个新的以组为丰富的粘弹性模型准确地预测了自愈玻璃体的行为,通过考虑阻尼材料中的组运动来改进经典模型.
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
- 类风病学 类风病学 类风病学
背景情况:
- 经典的粘弹性模型往往无法捕捉自我愈合的玻璃体中复杂的行为,因为它们的范围有限,主要考虑链段和整个链的运动.
- 玻璃材料,特别是那些设计用于缓冲应用的材料,表现出重要的群体运动,这些运动对于其性能至关重要,但在传统模型中被忽视.
研究的目的:
- 开发和验证一种"群体丰富"的粘弹性模型,能够准确地描述自我愈合的玻璃剂的行为,其中群体效应是突出的.
- 合成了一种具有众多悬挂链的新型缓冲玻璃剂,以增强缓冲性能并突出群体效应的重要性.
主要方法:
- 合成了一种具有丰富悬挂链的缓冲玻璃剂,以增加缓冲能力.
- 开发一个集团丰富的粘弹性模型,纳入集团运动的影响.
- 合成的玻璃制剂的阻尼行为的实验性表征和与模型预测的比较.
主要成果:
- 合成的玻璃化物表现出由于其悬挂的链条而增强的阻尼能力.
- 集团丰富的粘弹性模型准确地捕获了合成的玻璃材料的实验性阻尼行为.
- 与这种特定材料的经典粘弹性模型相比,模型的准确性显著提高.
结论:
- 群体丰富的粘弹性模型提供了更准确的自我愈合玻璃体动态的表现,特别是当群体运动是显著的.
- 群体效应对粘弹性行为的影响是频率和温度依赖的,在低频率下是可以忽略不计的,但在高频率或低温度下是显著的.
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