硫化物键密度对聚氨/环氧透网的性能的影响
Gudong You1, Xi Li1, Kaiwen Ren1
1School of Materials Science and Engineering, Chang'an University, Xi'an 710061, China.
Materials (Basel, Switzerland)
|April 24, 2025
概括
这项研究开发了具有动态二硫化物键的自我愈合的聚氨/环氧互穿聚合物网络 (IPN). 这些先进的IPN为长期的材料性能提供了更好的阻尼和机械性能.
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
- 机械工程 机械工程
背景情况:
- 相互透的聚合物网络 (IPN) 是关键的阻尼材料,但遭受长期降解,如微裂纹.
- 现有的IPN需要增强耐用性和在苛刻的应用中持续的性能.
研究的目的:
- 设计和合成具有自愈合的聚氨 (PU) /环氧 (EP) IPN,其中包含动态二硫化物键.
- 调查二硫化物键对PU/EP-IPN的阻尼,自我修复和形状记忆性能的影响.
主要方法:
- 合成PU/EP-IPN具有不同的二硫化物键密度.
- 机械,热力学,缓和和自我愈合性质的表征.
- 评估形状记忆性能,包括形状固定和恢复率.
主要成果:
- 合成的PU/EP-IPN表现出显著增强的阻尼性能,有效阻尼范围为61.4°C,损耗系数为0.859.
- 实现了高形状固定率 (高达95.0%) 和形状恢复率 (高达99.7%),显示出出色的形状记忆效果.
- 增加的二硫化物键密度与改善的阻尼性能和自我愈合能力相关.
结论:
- 结合动态二硫化物键有效地增强了PU/EP-IPN的缓和自我愈合特性.
- 这些新型IPN显示出优越的形状记忆性能和改进的机械特性.
- 开发的PU/EP-IPN作为具有内在自我修复功能的先进,耐用的缓冲材料显示出相当大的前景.
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