含柔性链EP/SiO_2-TiO_2纳米复合材料的制备  

STUDIES ON THE PREPARATION OF EP/SiO_2-TiO_2 NANOCOMPOSITES CONTAINING THE FLEXIBLE CHAIN

作　　者：陆绍荣[1] 张海良[2] 赵才贤[2] 王霞瑜[2] 

机构地区：[1]湘潭大学高分子材料研究所,湖南湘潭411105 [2]教育部重点实验室桂林工学院有色金属材料及其加工新工艺实验室,广西桂林541004

出　　处：《高分子材料科学与工程》2005年第3期253-257,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金项目(20374042);广西自然科学青年基金项目(0447053)

摘　　要：以聚乙二醇(PEG-2000)、甲苯二异氰酸酯(TDI)为原料合成预聚体,然后以3-氨基丙烷乙氧基硅烷(WD-50)对其封端,合成含有柔性链的硅烷偶联剂。并以其为改性剂,用溶胶-凝胶方法制备了EP/SiO2-TiO2纳米复合材料,利用红外光谱、动态粘弹谱仪、X射线衍射、冲击实验机、扫描电镜和原子力显微镜等手段研究了这种材料的结构与性能。结果表明,与纯环氧树脂相比,改性材料的冲击强度提高了2～3倍,并具有较高的模量和热性能,玻璃化转变温度仅发生微小的变化。Siloxane coupling agent was synthesized by 3-aminopropyl triethyloxysiliane(WD-50) and prepolymer, which was synthesized from polyethylene glycol (PEG-2000) and toluene disocyanate. EP/SiO_2-TiO_2 nanocomposite has been prepared by a sol-gel method using prepolymer as modifier. The structure and properties of the nanocomposite was characterized by FT-IR spectroscopy, measurement viscoelasticity, XRD diffraction patterns, impact property, scanning electron microscope and atomic force microscope etc. The results show that the impact strength of the modified systems are 2~3 times higher than that of the unmodified systems, while the high modulus and good thermal properties are maintained, and the glass transition temperatures are little altered.

关 键 词：环氧树脂 溶胶-凝胶 柔性链 纳米复合材料 

分 类 号：TB383[一般工业技术—材料科学与工程]