新型改性环氧增韧稀释剂的制备与性能  

Preparation and performance of a new modified epoxy toughening diluent

作　　者：陈松林 杨朝钧 刘少扬 鲁程 王勇 CHEN Songlin;YANG Chaojun;LIU Shaoyang;LU Cheng;WANG Yong(Wuhan University of Science and Technology,Faculty of Resources and Environmental Engineering,Wuhan 430081,China;Naval University of Engineering,Foundation Department,Wuhan 430033,China;Xianning Haiwei Composite Products Co.,Ltd,Xianning 437099,China)

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081 [2]海军工程大学基础部,湖北武汉430033 [3]咸宁海威复合材料制品有限公司,湖北咸宁437099

出　　处：《弹性体》2024年第5期1-7,共7页China Elastomerics

基　　金：海军后勤部重点研发项目(BHJ22C044)。

摘　　要：将聚硫橡胶封端改性甲苯二异氰酸酯(TDI)与丁二醇二缩水甘油醚(622)反应得到聚硫代氨酯改性环氧稀释剂(U622LP30)。研究了U622LP30含量对环氧树脂共混体系黏度的影响及固化体系的相结构和微观形貌。结果表明,U622LP30可显著降低环氧树脂(E51)的黏度,当U622LP30在E51/U622LP30共混体系中的质量分数为20%~30%时对体系黏度影响最大;固化物中存在“海岛结构”,当U622LP30在实验配方组分A的质量分数为40%和50%时,拉伸强度、弯曲强度及剪切强度最大分别可达67.54 MPa、167.01 MPa和20.46 MPa,当实验配方组分A中U622LP30的质量分数达到60%时,其固化物的冲击强度高达354.61 J/m,增韧效果明显。Polythiocarbamate modified epoxy diluent(U622LP30) was prepared by the reaction between polysulfide rubber terminated modified toluene diisocyanate(TDI) and butanediol diglycidyl ether(622).The effects of U622LP30 content on the viscosity of epoxy resin blends and the phase structure and microstructure of cured systems were investigated.The results showed that U622LP30 could significantly reduce the viscosity of epoxy resin(E51).The viscosity of epoxy resin(E51/U622LP30) was most affected when the mass fraction of U622LP30 in E51/U622LP30 blends was 20%~30%,and there was “island structure” in the cured material.When the mass fraction of U622LP30 in component A of the experimental formula was 40% and 50%,the maximum tensile strength,bending strength and shear strength could reach 67.54 MPa,167.06 MPa and 20.46 MPa,respectively.When the mass fraction of U622LP30 in component A of the experimental formula reached 60%,the impact strength of the cured material was 354.61 J/m,and the toughening effect was good.

关 键 词：甲苯二异氰酸酯 聚硫橡胶 环氧活性稀释剂 增韧改性 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]