| 聚碳酸酯自然老化行为研究 |
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| 引用本文： | 张晓东,彭坚,王俊,冯皓.聚碳酸酯自然老化行为研究[J].中国塑料,2012(7):39-42. |
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| 作者姓名： | 张晓东 彭坚 王俊 冯皓 |
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| 作者单位： | 中国电器科学研究院有限公司,工业产品环境适应性国家重点实验室 |
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| 基金项目： | 973基金项目(2010CB735804) |
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| 摘 要： | 研究了在海南万宁自然曝露试验后的聚碳酸酯(PC)结构和性能的变化。结果表明,老化后,PC的拉伸强度下降,由韧性断裂逐渐转变为脆性断裂;老化过程中,PC试样表面产生裂纹等缺陷,导致透光率下降,而碳碳偶合双键的产生则是黄变的主要原因;傅里叶变换衰减全反射红外光谱分析显示,曝露面同时发生了氟利斯(Fries)重排和光氧老化反应,而背面仅发生氟利斯重排反应。
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| 关 键 词： | 聚碳酸酯 自然老化 光氧老化 氟利斯重排反应 |
Research on Polycarbonate Weathering |
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| ZHANG Xiaodong,PENG Jian,WANG Jun,FENG Hao.Research on Polycarbonate Weathering[J].China Plastics,2012(7):39-42. |
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| Authors: | ZHANG Xiaodong PENG Jian WANG Jun FENG Hao |
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| Affiliation: | (State Key Laboratory of Environmental Adaptability for Industrial Products,China National Electric Apparatus Research Institute Ltd,Guangzhou 510663,China) |
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| Abstract: | Structure and properties of polycarbonate before and after weathering at Wanning,Hainan province were investigated.Mechanical testing showed that,after weathering,the tensile strength of PC slowly reduced,and stiffness increased remarkably.During weathering,craze or crack appearing on the exposed surface resulted in decreasing light transmittance and generating carbon-carbon coupling double bond resulted in increasing yellowness;ATR-FTIR of exposed and back surface showed that,the possible degradation mechanism of exposed surface was Fries-rearrangement and photo-oxidation,but only Fries-rearrangement for back surface. |
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| Keywords: | polycarbonate weathering photo-oxidation degradation Fries-rearrangement reaction |
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