Degradation of Carbon Fiber-Reinforced Epoxy Composites by Ultraviolet Radiation and Condensation

By B. G. Kumar, Raman P. Singh, Toshio Nakamura. 2002

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Durability and prediction models of fiber-reinforced polymer composites under various environmental conditions: A critical review (2016, neutral): “Optical micrographs of CFRP/epoxy composite specimens after 1000 h of cyclic exposure to both UV radiation and condensation.(110) Wang et al.”
Cracks, microcracks and fracture in polymer structures: Formation, detection, autonomic repair (2016, background): “Similarly, after exposure to 500 h of UV radiation, formation of microcracks has also been found in the epoxy matrix in carbon fibre reinforced epoxy composites [118].”
Environmental degradation of epoxy–organoclay nanocomposites due to UV exposure. Part I: Photo-degradation (2007, background): “There are two major mechanisms that are responsible for the aggravated photo-degradation of polymer in the presence of absorbed moisture: (i) the water molecules enhance the photo-oxidative reactions due to the increased OH and H ions [22]; and (ii) the water molecules can be located on the free vol”
Crack Damage in Polymers and Composites: A Review (2016, background): “Upon UV exposure, UV photons are absorbed by polymers and these give rise to photo-oxidative reactions, which causes molecular chain scission and/or chain crosslinking.(104,105) The molecular chain scission process generates polymer radicals and lowers the molecular weight of polymers.”