海南地区T700/5288炭纤维复合材料自然老化性能研究

Study of Environmental Aging of T700/5288 CFRP in Hainan

针对南海地域的自然环境,将T700/5288炭纤维增强环氧树脂复合材料放置于海南省万宁市,经过自然老化3年后,研究其微观形貌、力学性能与热性能等。研究表明,由于热氧老化与光氧老化的存在,复合材料表层环氧树脂出现了化学降解,表面纤维发生裸露,起毛等现象,老化试样纵向压缩强度降低19%,横向压缩强度降低14%,其他表征力学性能基本不变,玻璃化转变温度降低了27℃。

The experiment of natural aging durability of T700/5288 carbon fiber reinforced plastic in the Wanning（Hainan Province） under the South China Sea environmental condition was carried out.The specimens were placed in natural environment for three years.Microscopic morphology,mechanical properties and thermal properties were researched.The result showed that the presence of thermo-oxidative aging and photo-oxidative aging caused the composite surface epoxy chemical degradation,surface fibers exposed,the specimen longitudinal compressive strength decreased by 19%,transverse compressive strength decreased by 14%.The other mechanical properties remained basically unchanged.The glass transition temperature was reduced by 27℃.