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  

Structure and Properties of Nanocomposite of PET/Natural Na^+- Montmorillonite Modified by PEG

作　　者：陈立恒[1] 陈英红[1] 郑怡磊[1] 

机构地区：[1]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

出　　处：《塑料科技》2009年第5期40-44,共5页Plastics Science and Technology

基　　金：国家重点基础研究发展计划(973)项目(2003CB615600)

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。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 tensUe strength is up to 59.8MPa, the notched impact property is up to 3.13k J/m^2.

关 键 词：聚对苯二甲酸乙二醇酯 钠基蒙脱土 纳米复合材料 

分 类 号：TB383.1[一般工业技术—材料科学与工程]