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基于聚乙烯-聚聚氨和环氧树脂的相互透的聚合物网络
Chao Feng1, Zhiqiang Song1, Dongdong Xu1
1School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, China.
Polymers
|January 28, 2026
概括
这项研究开发了固聚氨/环氧 (PU/EP) 相互透的聚合物网络 (IPN),以提高材料性能. 引入聚聚显著改善了机械和粘合性能,为耐用环氧复合材料提供了一个新的战略.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 复合材料 复合材料 复合材料
背景情况:
- 环氧树脂需要硬化,用于更广泛的工程应用,特别是耐久混凝土维修.
- 开发高性能硬化环氧系统对于先进的材料需求至关重要.
研究的目的:
- 合成和描述高性能聚氨/环氧 (PU/EP) 相互透的聚合物网络 (IPN).
- 研究软片段修改对环氧复合材料的机械和粘合性能的影响.
主要方法:
- 通过预聚合物和逐步方法使用聚聚 (PPG-1000),异酸盐 (MDI-50) 和E51环氧化合物合成PU/EP IPN.
- 优化了PU预聚合物含量,并通过引入聚聚 (PS-2412),调整了软部分.
- 评估的机械性能 (拉力强度,破裂时的延长,压力强度) 和粘合强度 (干燥和湿).
主要成果:
- 最佳的PU预聚合物含量 (重量15%) 在聚乙烯基IPN中产生了平衡的机械性能.
- 在30/70的比例上加入PS-2412显著提高了拉伸强度 (66.74 MPa),压力强度 (74.24 MPa) 和粘合强度 (5.68 MPa干,4.62 MPa湿).
- 改进归因于PS-2412的交叉连接密度增加和网络统一性改善.
结论:
- 该研究提出了一个有效的软段设计策略,用于硬化环氧复合材料.
- 开发的PU/EP IPN具有强大的机械和粘合性能,适合苛刻的应用.
- 这项研究通过量身定制的聚合物网络设计,为先进,耐用的环氧材料提供了一条途径.
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