The aging behavior of a fast-curing epoxy resin (EP) was examined over three months in unidirectional carbon fiber prepregs for the first time. The semi-latent, 120 °C curing one-pot formulation was developed based on industry-grade diglycidyl ether of bisphenol A (DGEBA) resins without the necessity of B-staging, to fully monitor the property change by aging without any post-processing influence. To extend the shelf-life compared to standard wet EP systems, the latent dicyandiamide (DICY) and a semi-latent urea-based catalyst were used, leading to full conversion within 15 min. The conversion was monitored by increasing T_g0 and rheology. High quality unidirectional carbon prepregs were manufactured and then investigated over three months regarding tackiness and resin flow. In parallel, laminates were autoclave-manufactured to evaluate the aging influence on the interlaminar properties. Thus, a correlation between decreasing gel-time, interlaminar adhesion and resulting multiple crack growth was observed via G_IC and interlaminar shear strength (ILSS) testing. The investigations show a clear influence of the consolidation quality of the prepregs based on ILSS values and G_IC values. A decrease of 19% in ILSS and combined with an erroneous increase of 63% of the G_IC due to multiple delamination was observed in the worst case.

快速固化环氧树脂 (EP) 的老化行为首次在单向碳纤维预浸料中进行了三个月以上的测试。基于工业级双酚 A 缩水甘油醚 (DGEBA) 树脂开发的半潜伏、120 °C 固化一锅配方，无需进行 B 阶段，完全监控老化导致的性能变化，无需任何后处理影响。与标准湿 EP 系统相比，为了延长保质期，使用了潜伏双氰胺 (DICY) 和半潜伏尿素基催化剂，从而在 15 分钟内实现完全转化。通过增加_Tg0监测转化率和流变学。制造了高质量的单向碳预浸料，然后在三个月内对粘性和树脂流动性进行了调查。同时，通过高压釜制造层压板以评估老化对层间性能的影响。因此，通过G _IC和层间剪切强度 (ILSS) 测试观察到凝胶时间减少、层间粘附和由此产生的多裂纹扩展之间的相关性。研究表明基于 ILSS 值和G _IC值的预浸料固结质量有明显影响。在最坏的情况下，观察到ILSS 下降 19%，同时由于多次分层导致G _IC错误增加 63% 。