关键词: 汽车高分子材料；光老化试验方法；光老化试验原则；光老化评估方法

Abstract: Sunlight irradiation is one of the main reasons for damaging automotive polymer materials. This paper adopts the method of comparative research, and compares the advantages, disadvantages and applicability of four light aging test methods: carbon arc lamp test method, fluorescent ultraviolet lamp test method, xenon arc lamp test method and metal halogen lamp test method, so that testers can adopt appropriate methods for light aging test, so as to shorten the test cycle, accurately evaluate product quality and quickly screen problem products. In order to ensure the accuracy of the test, this study also proposed the principles of spectral similarity, suitable temperature and humidity and how to evaluate the aging results from the aspects of appearance, color, physical properties and so on.Finally, it is concluded that xenon arc lamp test is becoming the mainstream light aging test method.

Key words: Automotive polymer materials; Test method of photoaging; Principle of photoaging test; Assessment method of photoaging