One light Accelerated aging test has a different light source to simulate the actual aging process of plastic parts, such as xenon lamp, carbon arc lamp and UV, etc., A Jun said it is difficult to understand, in fact, the purpose of these light source design is mainly to simulate different application environments, such as UV, etc. can be configured daylinght Fliter and window glass Fliter, respectively, to simulate the aging process of exterior and interior, different filters can achieve different wavelengths of light, and different polymers of its sensitive wavelength is different, so the same light source under the same material The aging results may vary widely. The shorter the sensitive wavelength, the greater the energy required for molecular structural damage, the less difficult to interrupt the molecular bond, but this does not mean that the better weather resistance, such as PC and PP, light is important but not the only factor.

Second, the temperature. Black than the white material surface temperature 15 ℃, although the temperature will not directly lead to material discoloration or molecular chain breakage, but the temperature will accelerate the process of light aging, the current interior standards of the depot standard black mark temperature of 89 ℃, exterior requirements of 70 ℃, so the photo-aging process is actually accompanied by long-term high temperature heat aging. According to the Arrhenius equation, the photoaging rate is exponentially increasing, and the weathering agent means that it is incapable of heat aging.