| PVC—U管材日晒变黑问题的分析 |
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| 引用本文： | 陈浩,陈炽可,简杰玲. PVC—U管材日晒变黑问题的分析[J]. 聚氯乙烯, 2012, 40(3): 20-22 |
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| 作者姓名： | 陈浩 陈炽可 简杰玲 |
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| 作者单位： | 梧州五一塑料制品有限公司,广西梧州,543004 |
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| 摘 要： | 叙述了TiO2表面发生光催化反应的反应过程，对PVC—U管材进行了紫外灯照射试验。结果表明：①TiO2在表面发生光催化反应过程中与样品含有的铅化合物发生氧化还原反应生成了黑色的单质铅，从而产生灰黑色斑；②金红石型钛白粉只能减缓变色速度，不能完全避免问题的发生；③采用PVC收缩膜包装PVC—U管材时会促进灰黑色斑的产生。
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| 关 键 词： | PVC—U管材 质量问题 紫外线 钛白粉 光催化反应 |
Analysis on the problem of becoming black of PVC-U tubes under sunshine |
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| CHEN Hao,CHEN Chike,JIAN Jieling. Analysis on the problem of becoming black of PVC-U tubes under sunshine[J]. Polyvinyl Chloride, 2012, 40(3): 20-22 |
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| Authors: | CHEN Hao CHEN Chike JIAN Jieling |
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| Affiliation: | (Wuzhou Wuyi Plastic Products Co.,Ltd.,Wuzhou 543004,China) |
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| Abstract: | The photocatalytic reaction process on surface of TiO2 is described.PVC-U tubes were experimented on exposure to a UV lamp.The results showed that(1) black elemental lead is generated from the redoxreaction between TiO2 and lead compounds contained in samples during the photocatalytic reaction of TiO2 on surface,and thus forming gray-black spots;(2) rutile type of titanium white powder can only slow the rate of discoloration and can not completely prevent discoloration;(3) wrapping PVC-U tubes with shrinkable PVC films will prompt the formation of gray-black spots. |
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| Keywords: | PVC-U tube quality problem ultraviolet ray titanium white powder photocatalytic reaction |
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