| Aviation perspex had been studied within135days in different conditionsincluding thermo-oxidative, NaCl solution, UV irradiation and Xenon irradiation. Thequality, morphology, infrared absorption spectroscopy, molecular weight, mechanicalproperties (tensile strength and impact strength), optical properties (transmittance andhaze) and thermal properties of aviation perspex in different aging time were measured.The aging behavior of aviation perspex was researched in order to analysis the maineffect factor of aging. According to aging test date, the performance change of aviationperspex has been trained and simulated by artificial neural network and the life ofaviation perspe was forecasted.The results showed that the molecular chains of aviation perspex have broken, andthe molecular chain had not generated new group during4different testing conditions.And the thermal properties of aviation perspex were not change after aging test. Thesurface of aviation perspex appeared defect in NaCl solution, UV irradiation and xenonirradiation conditions, and the surface emerged micro-crack in xenon irradiation for135days. With xenon irradiation time increased, the tensile strength and impact strengthdecreased and haze increased. The surface of aviation perspex was aging after xenonirradiation for135days.Xenon irradiation had great influence on the performance of aviation perspex in4different environment, which shows that light and temperature are the primary factorcaused to aviation perspex aging. It was determined to be aviation perspex invalidconditions when half of the initial value of the tensile strength or that of less90%oftransmittance was reached. The tensile strength and transmittance of Xenon acceleratedaging different time has been trained and simulated by artificial neural network. TheXenon accelerated aging lifespan of the aviation perspex was195days. According tothe predictability results of the accelerated aging, it could be calculated that the servicelife of aviation perspex is8years. |
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