耐高温聚氨酯改性TDE-85/E-51环氧树脂胶粘剂的制备和性能  

Structure Adhesive of TDE-85/E-51 Epoxy Resin Modified by Polyurethane

作　　者：李芝华[1,2] 卢健体[1,2] 丑纪能[1,2] 郑子樵[1,2] 

机构地区：[1]有色金属材料科学与工程教育部重点实验室 [2]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《高分子材料科学与工程》2009年第8期159-161,166,共4页Polymer Materials Science & Engineering

基　　金：国家新材料科技攻关项目(MKPT-04-388)

摘　　要：以混合芳胺为固化剂,通过聚氨酯(PU)对4,5-环氧环己烷-1,2-二甲酸二缩水甘油酯(TDE-85)与二酚基丙烷缩水甘油醚(E-51)环氧树脂的改性,制备了一种高强高韧的耐高温环氧树脂结构胶粘剂。通过改变E-51、TDE-85、PU及固化剂之间的配比,探讨了各个组分对胶粘剂力学性能的影响。通过SEM分析,研究了PU增韧环氧树脂的机理。结果表明,TDE-85和E-51的配比为1∶1,PU添加量为环氧树脂的19%,芳胺固化剂添加量为20%时,胶粘剂具有最佳的耐热性和力学性能。制备的PU改性TDE-85/E-51结构胶粘剂室温拉伸剪切强度达到25.81 MPa,160℃高温拉伸剪切强度为12.85 MPa,剥离强度达到51.68 N/cm。With polyurethane（PU） modification of the blend of phenol-based epoxy propane （E-51 ） and diglycidyl- 4,5-epoxycyclohexane-1, 2-diearboxylate （TDE-85）, the high performance TDE-85/E-51 epoxy resin structure adhesive was prepared with the mixed aromatic amine as curing agent. The influences of raw material ratio on the mechanical properties of the adhesive were discussed, and the PU toughen mechanism of the adhesive was also investigated by scanning electron microscope（SEM）. The results indicate that when the TDE-85/E-51 ratio is 1：1, and the amount of PU and aromatic amine reaches to 19% and 20% respectively, the adhesive obtains the best mechanical properties, and it＇s most shear strength achieves 25.81 MPa and 12.85 MPa under room temperature and 160 ℃, and the peel strength of the adhesive is 51.68 N/cm.

关 键 词：聚氨酯 环氧树脂 结构胶粘剂 力学性能 

分 类 号：TQ433.437[化学工程]