硬段结构对聚氨/聚乙烯甲酸) 阻尼复合材料的性能的影响
Jinbao Ma1, Chi Ma1,2, Risheng Long3
1School of Material Science and Engineering, Shenyang University of Chemical Technology, Shenyang Economic and Technological Development Zone, 11th Street, Shenyang 110142, China.
这项研究开发了新的聚氨 (PU) /聚乙烯甲基酸盐 (PEMA) 复合材料,用于增强振动和降低噪音. 基于异二酸盐 (IPDI) 的PU/PEMA复合物表现出优异的阻尼性能.
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
- 声学工程 声学工程
背景情况:
- 传统的缓冲材料在缓冲峰值和温度范围内存在局限性.
- 有效的振动和降噪在很大程度上取决于声材料的性能.
- 开发先进的阻尼材料对于各种工程应用至关重要.
研究的目的:
- 合成和表征聚氨 (PU) /聚乙烯甲基酸盐 (PEMA) 复合材料,具有多种硬段.
- 研究硬段结构对PU/PEMA复合材料的阻尼性能和热稳定性的影响.
- 通过分子动力学模拟来探索阻尼性能背后的分子机制.
主要方法:
- 合成PU/PEMA复合材料,使用不同的二酸盐 (TDI,MDI,IPDI,HDI) 来合成PU硬片段.
- 使用红外光谱学,热重力测量分析和动态机械热分析进行表征.
- 分子动力学模拟以阐明分子层面的性能机制.
主要成果:
- 由于微相分离和增加的自由体积,PU / PEMA复合物与异二酸盐 (IPDI) 硬片段显示了最高的阻尼性能 (损失系数为0.56),由于微相分离和增加的自由体积.
- 具有多二酸盐 (TDI) 和二甲二酸盐 (MDI) 硬段的复合材料表现出更好的兼容性和增强的热稳定性 (MDI-PU/PEMA高达287.87°C).
- 分子动力学模拟与材料结构相关,具有增强的阻尼性能.
结论:
- 硬段结构显著影响PU/PEMA复合材料的阻尼性能和热稳定性.
- 基于IPDI的PU/PEMA复合材料提供了卓越的阻尼能力.
- 这项研究为优化针对特定应用的基于PU的缓冲材料提供了基础.
更多相关视频
07:02The Preparation and Properties of Thermo-reversibly Cross-linked Rubber Via Diels-Alder Chemistry
Published on: August 25, 2016
07:15A Testing Platform for Durability Studies of Polymers and Fiber-reinforced Polymer Composites under Concurrent Hygrothermo-mechanical Stimuli
Published on: December 11, 2014
相关概念视频
Molecular Weight of Step-Growth Polymers
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
Bending of Members Made of Several Materials
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
Polymer Classification: Architecture
Members Made of Elastoplastic Material
As the bending moment...
