PEG改性天然钠基蒙脱土及其与PET纳米复合材料的结构与性能 |
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引用本文: | 陈立恒,陈英红,郑怡磊.PEG改性天然钠基蒙脱土及其与PET纳米复合材料的结构与性能[J].塑料科技,2009,37(5). |
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作者姓名: | 陈立恒 陈英红 郑怡磊 |
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作者单位: | 四川大学高分子研究所高分子材料工程国家重点实验室,四川成都610065 |
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摘 要: | 采用环境友好、热稳定性较高且与聚对苯二甲酸乙二醇酯(PET)有良好相容性的聚乙二醇(PEG)改性天然钠基蒙脱土(Na+-MMT)与PET熔融共混制备了PET/Na+-MMT纳米复合材料。结果表明,经PEG改性的Na+-MMT的层间距增加,与PET熔融共混后其层间距进一步加大,TEM分析证实了MMT片层存在插层型纳米结构。相对传统的有机蒙脱土,PEG改性Na+-MMT的热稳定性有显著改善,满足了PET的高温加工要求。此外,PEG改性的Na+-MMT比未处理Na+-MMT对PET有更低的冷结晶温度和更高的熔融结晶温度,显著改善了PET的结晶能力。所制的纳米复合材料具有良好的力学性能,其拉伸强度可达59.8MPa,缺口冲击强度可达3.13kJ/m2。
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关 键 词: | 聚对苯二甲酸乙二醇酯 钠基蒙脱土 纳米复合材料 |
Structure and Properties of Nanocomposite of PET/Natural Na~+- Montmorillonite Modified by PEG |
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Abstract: | PET/Na+-MMT nanocomposite was prepared by melt blending PET with Na+-MMT modified by PEG.The results show that:the interlayer distance of Na+-MMT modified by PEG increases,after melt blending with PET,the interlayer distance increases further,TEM analysis proves intercalated nanostructure exist in MMT;compared with traditional organic MMT,the thermal stability of Na+-MMT modified by PEG is improved obviously,which could satisfy the requirement of high temperature processing for PET.Compared with untreated Na+-MMT,Na+-MMT modified by PEG could improve the crystallization property of PET obviously.The mechanical properties of modified Na+-MMT/PET composite are excellent,the tensile strength is up to 59.8MPa,the notched impact property is up to 3.13kJ/m2. |
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Keywords: | PET Na+-montmorillonite Nanocomposite |
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