exposure duration

This article gives a detailed presentation of the exposure test process of polystyrene specimens in Chinese and American natural exposure test sites.

详细介绍了聚苯乙烯塑料样品在中美两国四个典型自然气候曝露试验场的曝露试验情况,测量了样品曝露试验前后的黄色指数变化,并对这些数据进行了统计分析,研究了不同曝露开始时间造成的曝露季节变化对试验结果的影响,比较了这四个气候曝露试验场对聚苯乙烯的气候严酷性,结果为:海南琼海曝露试验场>佛罗里达曝露试验场>亚利桑那曝露试验场>广州花都曝露试验场。

The 16,year exposure testing results of several types protective and decorative electroplated coatings were introduced.

介绍了几种不同组合的防护装饰性镀层经16年大气曝露试验后的情况。

The change of mechanical properties and micro-structure of PE-HD during Hainan natural exposure and xenon lamp weathering was studied.

研究了高密度聚乙烯在海南自然曝露和氙灯人工老化后的结构和力学性能变化。