玻璃纤维/溴化环氧乙烯基酯复合材料的加速光老化研究

Accelerated Light Aging of Glass Fiber /Brominated Epoxy Vinyl Ester Composites

研究了玻璃纤维增强溴化环氧乙烯基酯树脂复合材料(GFRC)光老化前后力学性能及其变化规律;用SEM和XPS对GFRC的表面微观形貌及元素变化进行检测分析;FTIR和同步热分析用来研究树脂光老化过程中的分子结构的变化规律和高温分解情况。结果表明,加速光老化之后GFRC的力学性能变化不大,有较好的拉伸强度、弯曲强度和压缩强度保留率;加速光老化过程中GFRC表面的树脂发生较明显的变化,出现了颜色变深,树脂脱落等老化现象;由于玻璃纤维的存在阻止了GFRC内部树脂基体的进一步老化。

Mechinical properties of glass fiber/brominated epoxy vinyl ester composites （ GFRC） were studied af-ter the accelerated light agingtest.Surface Micromorphology and Elements changes of GFRC in the aging process were researched by scanning electron microscope （ SEM） and X-ray photoelectron spectroscopy （ XPS） ,respectively.The results showed that the GFRC keeped perfect mechinical properties ,such as perfect retention in tensil ,bend, and compressive strength ,after being exposed under the light a period of time.The color of the GFRC surface be-came darker and a small section of the ester falled off from the GFRC surface.Fourier transform infraed spectrsco-py（ FTIR） and themo analysis showed that the continued aging of the internal ester was prevented by the surface glass fiber.