下一代结构粘合剂由环氧树脂和结合的烯基块聚合物基热塑性弹性体组成
Saya Yamada1, Takato Kajita1, Mio Nishimoto1
1Department of Molecular & Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
更坚固的环氧粘合剂是使用聚乙烯块-聚二烯块-聚乙烯 (SIS) 和改性SIS (h-SIS) 开发的. 与传统环氧树脂相比,这些新型结构粘合剂的剥离和冲击强度得到了改善.
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
- 粘合技术的技术 粘合技术
背景情况:
- 环氧粘合剂具有出色的机械强度,但缺乏灵活性,导致剥离和冲击阻力较低.
- 汽车,航空航天和建筑行业当前的结构粘合剂需要增强性.
研究的目的:
- 开发强硬的固化环氧粘合剂,具有改进的机械性能.
- 研究将SIS和h-SIS等热塑性弹性体 (TPE) 纳入环氧预聚合物的效果.
主要方法:
- 混合液体环氧预聚合物 (EP) 与聚乙烯块-聚二烯块-聚乙烯 (SIS) 和与结合的SIS (h-SIS).
- 使用膝盖剪切,剥离和冲击强度测试对粘合物特性进行表征.
- 通过传输电子显微镜 (TEM) 进行微结构分析.
主要成果:
- 与整洁环氧 (EP*) 相比,使用SIS的粘合剂的剥离性 (61 N/25 mm) 和冲击强度 (7.1 kN/m) 增加.
- 使用h-SIS的粘合剂表现出卓越的性能:膝盖剪切强度为21 MPa,剥离强度为97 N/25 mm,冲击强度为14 kN/m.
- TEM揭示了影响宏观性质的独特域结构.
结论:
- 将SIS和h-SIS纳入环氧预聚合物显著提高了固化环氧粘合剂的性和灵活性.
- 与未经修改的SIS相比,h-SIS在粘合性能,特别是剥离和冲击强度方面提供了卓越的改进.
- 开发的环氧粘合剂为要求高强度和耐久性的应用提供了可行的替代方案.
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