【作者】 金士九；

【Author】 Jin Shijiu (Institute of Chemistry,Chinese Academy of Sciences,Beijing,100080)

【机构】 中国科学院化学研究所；

【摘要】 添加一种分相的橡胶粒子到环氧树脂中可增加其破坏韧性。已知的这些改性剂有CTBN、微凝胶和核壳粒子等。这些橡胶增韧环氧树脂体系形成海岛结构,增韧的原因是橡胶粒子的撕裂并诱发母体的塑性变形。另一类替代反应性橡胶用于改性环氧的是多种强韧的热塑性塑料,环氧树脂变韧是形成了双连接相结构。综合讨论了改性剂和母体的性质对环氧树脂共混物韧性的影响以及增韧机理。更多还原

【Abstract】 Addition of a rubbery particle phase to epoxy often enhances fracture toughness.These rubbers are well known as liquid rubbers,microgels and core/shell particles etc.The mechanism proposed for rubber toughened epoxies(sea/island structure) is based on cavitation of rubber particles followed by plastic deformation of the matrix.The various types of ductile thermoplastics have been studied as alternatives to reactive rubber for improving the toughness of epoxy resins.The toughness of epoxies could be achieved based on the cocontinuous phase structure.更多还原