制备和性能研究的-寡合物复合物-改性聚氨密封剂
Ning Li1, Feiyu Chen2, Qing Liu1
1State Grid Beijing Electric Power Cable Company, Beijing 100022, China.
Polymers
|November 27, 2025
概括
这项研究开发了一种新寡合物 (DQPSi) 来改善聚氨 (PU) 密封剂. 添加15%的DQPSi显著提高了耐候性,固化速度和水性,创造了环保,高性能密封剂.
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
- 表面科学是一门学科.
背景情况:
- 传统的聚氨 (PU) 密封剂具有较差的耐候性,缓慢固化和有限的环境性能.
- 开发具有增强性能的先进密封剂对于各种工业应用至关重要.
- 修改西兰为改善密封剂特性提供了一条途径.
研究的目的:
- 合成具有动态交叉连接和疏水性质的功能性寡合物 (DQPSi).
- 调查DQPSi结合对西兰基改性聚氨 (SPU) 密封剂性能的影响.
- 建立最佳的DQPSi负载以提高密封剂性能,并了解其增强机制.
主要方法:
- DQPSi的Sol-gel合成与动态交叉连接和疏水组.
- 将DQPSi纳入PU矩阵,以不同度 (0-20 wt%) 的方式.
- 系统评估SPU密封剂的性能,包括干燥时间,固化速率,机械强度,延长和接触角度.
- 微观分析 (SEM,纳米印记) 以阐明结构-属性关系.
主要成果:
- 添加DQPSi显著提高了密封剂的性能,在15%重量负载下获得最佳效果.
- 表面干燥时间减少了45% (至110分钟),固化速度增加了112.5% (至1.7毫米/日).
- 拉伸模量增加了14% (至0.88 MPa),破裂时的延长达到420%,接触角改善到78°.
- 形成了一个相互透的网络 (IPN) 结构,增强了刚性和疏水性.
- 过度的DQPSi (20重量%) 导致相位分离,机械降解和微裂纹.
结论:
- 通过形成强化IPN结构,DQPSi有效地提高了SPU密封剂的综合性能.
- 15重%的最佳DQPSi负载可以平衡性能改进而不会导致退化.
- 该研究为开发高性能,环保的西兰改性聚氨密封剂提供了基础.
相关概念视频
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