摘要
合成端异氰酸酯聚醚 (ITPE) ,使其在不同条件下与环氧树脂 (ER)进行反应 ,得到分子链中含氨基甲酸酯和口恶唑烷酮结构的环氧树脂预反应物 ,考察了聚醚种类、相对分子质量和用量及固化条件对改性环氧胶胶接件拉伸剪切强度和浇铸件断裂韧性的影响 。
Isocyanate terminated polyethers were synthesized by reacting polyether with diisocyanate. They were prereacted with epoxy resin under different conditions. The pre reactants which contained the structure of isocyanurate and oxazolidone rings in molecular chain were obtained. The effects of the varieties, such as molecular weight and content of polythers and the curing conditions on the lap shear strength of the epoxy adhesive and the fracture toughness were investigated. Furthermore, the fractured surfaces of the modified epoxy resin have been observed by the use of SEM.
出处
《南京化工大学学报》
2000年第3期6-10,共5页
Journal of Nanjing University of Chemical Technology(Natural Science Edition)
基金
石油与化学工业局资助项目
关键词
端异氰酸酯聚醚
环氧树脂
增韧
改性
isocyanate terminated polyethers\ epoxy resin\ toughening effect
