先说一下概念,老化本身是一个综合的塑料性能的退化过程,老化也有很多种.所以说防老化剂概念比较大, 抗氧剂、紫外线吸收剂都是抗老化剂的一种.   塑料的各个不同种类,耐老化性能也不同,老化方式也不同,其中,氧化导致老化比较多见,比如PP,易于被氧化,所以PP的抗老化剂中一定会有抗氧剂的存在.   紫外线UV通常指在室外的情况,阳光中的UV是高能粒子,会导致塑料分子长链断裂,使塑料性能下降.
First of all, the concept of aging itself is a comprehensive degradation process of plastic properties. There are many kinds of aging. So the concept of anti-aging agent is relatively large. Antioxidants and ultraviolet absorbents are one kind of anti-aging agent. Different kinds of plastics have different aging properties and aging methods. Among them, oxidation leads to aging. More common, such as PP, is easy to be oxidized, so there must be antioxidants in PP anti-aging agent. Ultraviolet UV usually refers to the outdoor situation. UV in the sunlight is a high-energy particle, which will lead to long chain breakage of plastic molecules and reduce the performance of plastics.