对聚乙烯硫硬化环氧玻璃剂的研究:固化和动态性能
Xiang Liu1, Mei Fang1, Yuezhan Feng1
1State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002, China.
Macromolecular rapid communications
|October 7, 2024
概括
将聚硫 (PES) 添加到环氧树脂玻璃剂中,可以加速固化和应激放松. 这种修改增强了材料性能,如强度和性,提高了可加工性,并使形状记忆效应成为可能.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
背景情况:
- 传统的环氧树脂由于粘度低而面临加工挑战.
- 共价自适应网络 (vitrimers) 提供动态交联,但需要优化处理能力.
研究的目的:
- 调查聚乙硫 (PES) 对双A/氨酸无水化玻璃体二甲醇乙烯的固化动力学和应激放松的影响.
- 了解 PES 如何影响反应机制和材料特性.
主要方法:
- 异热固化研究分析反应动力学.
- 动态机械分析来评估压力放松行为.
- 交联密度的表征,玻璃过渡温度,抗拉强度和断裂性.
主要成果:
- 添加PES加快了固化速度的峰值,并将机制从化学控制转移到扩散控制.
- PES显著增强了应力放松,特别是在较低的温度下,减少粘性流动激活能量.
- 修改后的玻璃体表现出更好的交联密度,玻璃过渡温度,抗拉强度和断裂性.
结论:
- PES作为加工辅助而没有参与交叉连接反应.
- 纳入PES优化了环氧树脂玻璃制品的性能和可加工性.
- 经过修改的材料显示出出色的形状记忆和再处理能力.
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