作为环氧/混合物的兼容剂,块共聚物的组成的影响
Christelle Delaite1, Sophie Bistac1, Daniela Rusu1
1Laboratoire de Photochimie et d'Ingenierie Macromoleculaires (LPIM EA 4567), Université de Haute-Alsace, F-68100 Mulhouse, France.
Molecules (Basel, Switzerland)
|September 9, 2023
概括
研究人员通过结合液态颗粒开发了改进的环氧材料. 定制的共聚物作为兼容剂,降低脆性和增强最终环氧/混合物的机械性能.
科学领域:
- 聚合物科学与工程 聚合物科学与工程
- 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:
- 环氧树脂被广泛使用,但往往由于脆性而受损,限制了它们的机械应用.
- 提高环氧网的性和灵活性对于先进的材料开发至关重要.
- 结合二相颗粒,如,可以提高机械性能,但需要有效的兼容性.
研究的目的:
- 用于用分散的液颗粒制备交联环氧网.
- 研究共聚合物兼容剂对环氧/混合物形态和特性的影响.
- 为了实现增强的机械特性,特别是减少脆性,在环氧材料.
主要方法:
- 具有不同液含量的环氧网的合成.
- 使用具有疏水性 (多甲基) 和疏水性细分的共聚物作为兼容剂.
- 使用扫描电子显微镜 (SEM) 进行形态分析.
- 通过差分扫描热量计 (DSC) 进行热特性测定,以确定玻璃过渡温度 (Tg) 和固化行为.
主要成果:
- 聚合物结构和架构显著影响了颗粒的大小和分布.
- 一种特定的共聚合物表现出卓越的性能,产生更小的颗粒和更好的机械性能.
- 这项研究成功地在环氧基质中创建了in situ囊.
- 在优化的配方中观察到增强的曲特性和减少的脆性.
结论:
- 量身定制的共聚合物兼容剂有效地控制了环氧基质中散相的形态.
- 选择合适的兼容剂是实现环氧/混合物所需的机械增强的关键.
- 这种方法可以在现场形成微囊,为坚固易碎的环氧网络提供了一条途径.
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