含芳环脂肪胺在室温固化耐高温环氧胶中的应用研究

On application of aliphatic amines containing aromatic ring in RT curable and heat-resistant epoxy adhesive

研究了2种间二甲苯二胺(MXDA)缩聚物(缩胺105和G-328)在室温固化耐高温环氧胶中的应用,测试了其贮存性、固化速度、耐高温性、刚性和韧性等性能。结果表明,缩胺105反应速度较慢,G-328反应速度较快,2种缩胺均可在室温下24 h完全固化。其中缩胺105刚性较强、韧性较差,因此耐高温性能优异,适合用于提升体系的耐高温性能;G-328韧性较好、刚性较弱,在保证一定耐高温强度情况下,可提升体系的柔韧性。

The applicationoftwoMXDAcondensates（Condensed-amine 105 andG-328） in the RT curable and heat-resistant epoxy adhesive was investigated. The storage stability and curing rate of the curing agents, the heat resistance, rigidity and toughness of the cured were measured. The results show that the curing rate of Condensed-amine 105 is slower, the curing rate of G-328 is fast, and both the curing agents can be cured completely at RT for 24 h. For the products cured with Condensed-amine 105, the rigidity is better and the toughness is poor, the heat resistance is excellent, this curing agent is suitable for increasing the heat resistance of the system; for the G-328 system, the toughness is better and the rigidity is poor, so this curing agent is suitable for increasing the system flexibility in the condition of ensuring the definite high- temperature strength.