Abstract
Antioxidants were applied to a dual-luminophore pressure-sensitive paint (PSP), and those effects on photodegradation were studied. Three types of antioxidants that are commonly used for photostability enhancement of polymers were added to a dual-luminophore PSP, and changes in the luminescence intensity and pressure/temperature sensitivities due to photodegradation were investigated by coupon-based tests. One-hour-long aging tests were performed in a pressure chamber with a continuous excitation light source under dry air and argon atmospheres at 100 kPa and 20℃. As the result of the aging tests, a singlet oxygen quencher type antioxidant suppressed the intensity change by 91% compared with the dual-luminophore PSP without antioxidants. This indicates that singlet oxygen has an important role in the photodegradation mechanism of the dual-luminophore PSP.
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