复合聚氨粘合剂的合成和表征,依赖于热激活的转碳胺基化
Daniel Bautista-Anguís1, Lisbeth Reiner1, Florian Röper1
1Polymer Competence Center Leoben GmbH (PCCL), Sauraugasse 1, 8700 Leoben, Austria.
Polymers
|October 16, 2024
概括
研究人员开发了动态聚氨网络,用于可反弹粘合剂. 这些材料可以修复和再加工碳纤维增强聚合物,在热再结合后恢复高达79%的原始结合强度.
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
- 粘合技术的技术 粘合技术
背景情况:
- 动态聚合物网络提供了热固性机械性能和热塑性可加工性的独特组合.
- 这些网络利用外部触发的债券交换反应进行拓重新排列和宏观流动.
- 这种动态行为使得聚合物材料具有可修复性,可性和可再加工性等特性.
研究的目的:
- 合成动态聚氨网,作为可反弹粘合剂应用的模型化合物.
- 调查以乙二二胺-N,N,N',N'-四-2-醇 (EDTP) 作为共附着的转碳化催化剂的使用.
- 评估优化的动态聚氨粘合剂在粘合碳纤维增强聚合物 (CFRP) 的性能.
主要方法:
- 动态聚氨网络的合成,具有不同的交叉连接密度和基组的可用性.
- 利用EDTP催化剂促进的热激活转碳化.
- 在CFRP标本上使用单环剪切试验评估粘合性能,并评估回弹能力.
主要成果:
- 成功合成了具有可调节债券汇率和热力学性能的动态聚氨网络.
- 证明了在高温下使用动态粘合层重新粘合脱的CFRP标本的可行性.
- 在热再结合后,可恢复高达79%的原始结合强度.
结论:
- 使用EDTP功能化的动态聚氨网络在可反弹粘合剂应用中表现出有前途的特性.
- 该研究强调了在先进的复合材料中创建可持续和可修复的粘接接头的潜力.
- 债券交换反应的热触发提供了一种有效的反和延长债券组件使用寿命的机制.
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