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The oxidative degradation of styrenic copolymers: A comparison of photoproducts formation under natural and accelerated conditions

机译:苯乙烯共聚物的氧化降解:自然和加速条件下光产物形成的比较

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摘要

Natural and accelerated weathering of polystyrene and high-impact polystyrene were carried out in the present investigation. The structural changes in the polymer samples were characterized by using FTIR spectroscopy, tensile strength testing, and SEM spectroscopy. The natural exposure was conducted throughout the year. Rates of photooxidation were determined by measuring the evaluation in hydroxyl and carbonyl regions. The surface deterioration was revealed from SEM micrographs. The drop in tensile strength was also monitored. A correlation between natural and artificial weathering was considered for lifetime prediction in a short exposure time. (C) 2002 Wiley Periodicals, Inc. [References: 17]
机译:在本研究中,对聚苯乙烯和高抗冲聚苯乙烯进行了自然和加速的风化处理。通过使用FTIR光谱,拉伸强度测试和SEM光谱来表征聚合物样品中的结构变化。全年进行自然暴露。通过测量在羟基和羰基区域中的评估来确定光氧化速率。从SEM显微照片可以看出表面变质。还监测抗张强度的下降。为了在较短的暴露时间内进行寿命预测,考虑了自然和人工风化之间的相关性。 (C)2002 Wiley Periodicals,Inc. [参考:17]

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