Polystyrene is one of the most popular plastic material.The modified polystyrene samples were exposed in outdoor at Lasa and Mohe natural environment test stations.

• 摘要聚苯乙烯是目前用量最大的通用塑料之一，研究其在典型自然环境下的老化机制，对材料改性和提高产品耐候性具有重要意义。