Effect of vacuum ultraviolet radiation on properties of carbon/epoxy composite

The simulation of vacuum ultraviolet (VUV) and the working mechanism, technical parameters as well as characters of the gas-jet device for simulating vacuum ultraviolet were introduced. The outgas, mass loss ratio (fSAML), interlayer shear strength (δILSS), and variation in surface state of epoxy cast ingot (EP648) and carbon/epoxy composites (C/E648) under VUV were studied using the above device as well as other analysis means. Results show that VUV exposure resulted in obvious outgas effect, while mass loss ratio shows a trend of ascending followed by leveling off; the mass loss of EP648 is 3.4 times of that of C/E648 under dose of 17 280 esh; δILSS of C/E648 after exposure is decreased to 13.3% of that before the exposure; the epoxy is damaged greatly, while the surface of carbon fibe