一种低温固化的环氧树脂／碳纤维的制备及其性能研究

STUDY OF PREPARATION AND PROPERTIES ON LOW TEMPERATURE CURING EP/CF COMPOSITES

选用三乙烯四胺(TETA)、甲基六氢苯酐(MHHPA)、间苯二甲胺(MXDA)作为环氧树脂(EP)的固化剂,制备了一种固化温度为80℃的EP。研究表明,温度为80℃时,MHHPA不能单独固化该EP。少量的TETA或MXDA能够促进MHHPA对EP的固化,研究证明MHHPA和TETA或MXDA间生成了酰胺,TETA或MXDA起到了固化促进剂的作用。应用MHHPA-TETA(或MHHPA-MXDA)复合固化剂,以EP为基体树脂,碳纤维(CF)为增强材料制备了EP/CF复合材料,并对其力学性能进行了测试。其中MHHPA-MXDA复合固化得到的EP/CF复合材料的拉伸强度达到3644 MPa,断裂伸长率为1.493%,拉伸弹性模量为256 GPa。

TETA, MHHPA, MXDA was chosen as curing agents of EP. The EP which was cured at 80℃ was prepared. Research results showed that when the temperature was 80℃, MHHPA could not cure the epoxy resin, small TETA or MXDA MHHPA could promote MHHPA curing epoxy resin. Studies showed that, MHHPA and TETA or MXDA could react to obtain amide, TETA or MXDA played the role of curing accelerants. Taking epoxy resin as matrix resin, carbon fiber as reinforced materials and useing composite curing agent, the EP/CF composite material was prepared and it＇s mechanical properties was measured. When the EP/CF composite material was cured by MHHPA/MXDA, the tensile strength, elongation at break, and elasticity modulus was 3 644 MPa, 1. 443%, and 256 GPa, respectively.