液体和热塑性颗粒对硬化环氧树脂的协同作用
Zhaodi Wang1, Yuanchang Lai1, Peiwen Xu1
1College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China.
Polymers
|October 16, 2024
概括
将和热塑性颗粒添加到环氧树脂 (EP) 中,可以显著提高性. 这种协同效应与甲烯聚 (乙) 颗粒 (PEK-C) 和碳酸终结布液体 (CTBN) 实现,提高了抗冲击性能,而不会损害其他性能.
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
- 复合材料 复合材料 复合材料
背景情况:
- 环氧树脂 (EP) 广泛使用,但往往患有脆性.
- 硬化剂对于提高环氧树脂的断裂阻力至关重要.
- 研究多种硬化剂的协同效应,可以提高材料的性能.
研究的目的:
- 为了研究 (碳基终结布液体,CTBN) 和热塑性颗粒 (甲聚 (乙) 颗粒,PEK-C) 对环氧树脂 (EP) 的增硬作用.
- 了解EP系统中PEK-C和CTBN的协同硬化效应背后的机制.
- 评估这些硬化剂对改性EP的固化行为,热和机械性能的影响.
主要方法:
- 制备三个环氧树脂系统:EP/PEK-C,EP/CTBN,以及一个协同作用的EP/PEK-C/CTBN系统.
- 固化行为,热性能,机械性能 (包括冲击性,屈曲强度和模量) 和相位结构的表征.
- 对硬化剂和环氧树脂基质之间的相互作用进行分析.
主要成果:
- 甲烯聚 (乙烯基) 颗粒 (PEK-C) 与环氧树脂 (EP) 没有反应,而甲基终结布液体 (CTBN) 反应形成柔性块聚合物.
- 与单元硬化系统相比,EP/PEK-C/CTBN系统的冲击性明显提高.
- 在没有显著增加粘度或减少热稳定性,屈曲强度和模量的情况下实现了协同硬化.
结论:
- PEK-C和CTBN的组合为环氧树脂提供了协同的硬化效应.
- 增强的性归因于PEK-C和CTBN的联合能量消散机制.
- 这种方法为开发高强度环氧复合材料提供了一个有希望的方法,而不会影响其他关键性能特征.
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