Abstract This paper reports the results obtained after carrying out tests on specimens of two types of composite materials. These materials have the same polyetherimide (PEI) thermoplastic matrix, but a different type of reinforcement. In both cases, the reinforcement is fabric, one being made of carbon fibre and the other, of fibreglass. The specimens were tested after various periods of exposure to an outdoor environmental aging up to a maximum period of 20 years. Following static characterization tests, a significant decrease in mechanical properties was observed during the first eight years of exposure. From that time onwards, once what could be called the aging limit has been reached, these properties were maintained. From the fractographic point of view, there is a substantial loss of surface resin. This loss of resin is much more pronounced in the fibreglass composite, even being accompanied by fibre breakage.

中文翻译：

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玻璃纤维和碳纤维增强聚醚酰亚胺在希洪市（西班牙）户外环境老化 20 年后的机械性能

摘要 本文报道了对两种复合材料试样进行试验后获得的结果。这些材料具有相同的聚醚酰亚胺 (PEI) 热塑性基质，但具有不同类型的增强材料。在这两种情况下，增强材料都是织物，一种由碳纤维制成，另一种由玻璃纤维制成。在暴露于户外环境老化长达 20 年的不同时间后，对样品进行了测试。在静态表征测试之后，在暴露的前八年中观察到机械性能显着下降。从那时起，一旦达到所谓的老化极限，这些特性就会保持不变。从断口来看，表面树脂有大量损失。