中文摘要：

对聚苯乙烯（PS）、聚碳酸酯（PC）、聚乙烯（PE）、共聚聚丙烯（PPl）和均聚聚丙烯（PP2）这5种常见高分子材料开展模拟干热环境条件的人工加速老化试验，发现PC的色差在老化过程中同时具备稳定及显著的环境响应性，且与辐照量成线性关系；不同温度的人工加速老化试验证明PC的色差及黄色指数具有相对稳定的环境响应性。不同湿度的人工加速老化试验表明，PC对湿度敏感，不推荐作为湿热环境相关性的评价材料。基于PC的色差性能，对模拟干热环境的人工加速老化试验方法及自然干热环境（吐鲁番）的相关性进行了探讨。分析结果显示，二者具有良好的相关性，加速因子约为12．75。

英文摘要：

Five common polymer materials including polystyrene （PS）, polycarbonate （PC）, polyethylene （ PE）, copolymerization polypropylene （ PP1 ） and homopolymerization polypropylene （ PP2 ） were subjected to artificial accelerated weathering tests simulated dry-hot environment. PC was proposed to evaluate the correlation of different dry-hot weathering tests because its＇ color shift showed a steady and significant linear relationship with the cumulated UV doses. However, artificial accelerated weathering tests with different relative humidity revealed that PC was not suitable for hot-hot environment due to its sensitivity to humidity. Based on the color shift of PC, the correlation between artificial accelerated weathering method simulated dry-hot environment and natural dry-hot environment （Turpan） was discussed. Result indicated that they showed a nice correlation, and the accelerated factor was about 12. 75.