EP-g-PU IPN结构阻尼材料  

Structural Damping Materials of EP-g-PU IPN

作　　者：陈世杰[1] 毛闯[1] 许海燕[1] 劳元[1] 郭卫红[1] 吴驰飞[1] 

机构地区：[1]华东理工大学材料科学与工程学院,上海200237

出　　处：《功能高分子学报》2011年第2期125-130,共6页Journal of Functional Polymers

基　　金：国家科技支撑计划重点项目(2008BAC46B10);西南科技大学生物质材料教育部工程研究中心的开放基金

摘　　要：采用—NCO封端的聚氧酯(PU)预聚物,制备了环氧树脂-聚氨酯互穿网络(EP-g-PUIPN);通过添加受阻酚四[β-(3,5-二叔丁基-4-羟基苯基)丙酸]季戊四醇(AO-60)制备了AO-60/EP-g-PU IPN。通过FT-IR、DMA、SEM分别研究了改性分子链的基团变化、改性体系的动态性能及断裂面的形态,对其力学性能进行了表征,并对制备的工艺过程进行了研究。由于AO-60与PU链段间存在强烈的氢键作用,制备的AO-60/EP-g-PU IPN体系具有优异的阻尼性能;但是添加AO-60后,由于增韧效果及粒子的团聚,使得体系的力学性能有所降低,并且当m(AO-60)/m(EP)=0.4时,体系的阻尼性能及力学强度达到平衡,并且可以作为结构阻尼材料来使用。EP-g-PU IPN was prepared by isocyanate terminated PU.AO-60/EP-g-PU IPN was prepared by adding AO-60.The processing,molecular structure,dynamic mechanical properties and morphology were studied by FT-IR,DMA and SEM,and their mechanical properties were also tested.Results showed that： the damping properties of AO-60/EP-g-PU IPN were improved due to the strong hydrogen bond between AO-60 and PU molecular chain,but the mechanical properties of composites were reduced with AO-60 content increased because of toughening effect and particle aggregation;when mass ratio of AO-60 to EP was 0.4,damping properties and mechanical properties were optimized;it could be used as struc-tural damping materials.

关 键 词：受阻酚 环氧树脂 聚氨酯 接枝 阻尼 

分 类 号：TQ172.79[化学工程—水泥工业]