In the process of using automotive materials, especially non-metallic materials, due to the influence of the climatic environment, different degrees of aging will inevitably occur. In order to delay the aging of auto parts and materials, the outdoor life test is used to predict the service life. The natural environment test period is long, and the manufacturer recommends using a xenon lamp aging test chamber. What is the effect of temperature on the dashboard material of the xenon lamp aging test chamber? The following one explains for you:
1. The heat generated by the temperature causes the chemical bond of the polymer material to break, resulting in degradation of the material. At higher temperatures, the activity of the molecule is larger, which tends to cause a heat aging reaction; at lower temperatures, the reaction rate is slow or does not occur at all.
2. The temperature in the aging test chamber of the xenon lamp affects the speed of the chemical reaction. The high temperature will accelerate the effect of light on the aging of the car. It is generally believed that for every 10 °C increase in the temperature of the material, the rate of chemical reaction doubles.
3, thermal cycle can accelerate the aging process of automotive non-metallic materials, the cyclical changes in temperature will cause mechanical internal stress of the material, resulting in different degrees of dimensional changes in automotive non-metallic parts, extreme high and low temperature cycles will expand the original Defective, resulting in defects such as deformation or cracking.
The temperature of automotive interior materials tends to be higher than that of automotive exterior materials, and the instrument panel material is the part of the interior parts that is more strongly affected by sunlight. The extreme temperature sometimes exceeds 100 °C. Therefore, temperature is an important factor affecting the photoaging of automotive dashboard materials.
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