玻璃纤维/环氧树脂复合材料的微波固化行为及力学性能  

Curing Behavior and Mechanical Properties of Glass Fiber Epoxy Composites Cured by Microwaves

作　　者：马仁利 常新龙[1] 张晓军[1] 方鹏亚 

机构地区：[1]第二炮兵工程大学动力工程系,陕西西安710025

出　　处：《高分子材料科学与工程》2015年第3期54-58,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(11302249)

摘　　要：采用微波固化技术,对玻璃纤维/环氧树脂复合材料进行固化试验研究,运用红外测温方法、差示扫描量热仪、力学拉伸试验机和扫描电子显微镜等试验手段分析其固化行为及微观形态,对固化试样进行了力学性能测试,并与热固化试样进行了对比。研究结果表明,微波固化能显著提高固化反应速率,相比热固化缩短了78%的固化时间;微波固化复合材料具有比热固化复合材料高的玻璃化转变温度(Tg);微波固化试样的拉伸强度能达到热固化试样的85%,而面内剪切强度却要高于热固化试样约5%。扫描电镜分析表明微波固化试样树脂基体与纤维的粘接情况要稍好于热固化试样。Experimental study was carried out on the glass fiber epoxy composites subjected to microwave(MW) curing technique.Curing behavior and microstructure combined with mechanical properties of the glass fiber epoxy composites were investigated through a series of methods and equipments including infrared temperature testing method,differential scanning calorimeter(DSC),mechanical tension test machine and SEM.The obtained results were compared with those of conventional thermally cured composites.The study shows that MW curing could dramatically enhance the curing rate and a 78% cure cycle time reduction is achieved.DSC analysis reveals higher glass transition temperature(Tg) of MW cured composites compared with thermally cured counterparts.Moreover,mechanical testing shows that the tensile strength of MW cured composites is 85% of the tensile strength for thermally cured composites,whereas a 5% increase of the in-plane shear strength is observed for MW cured composites.SEM analysis indicates that the adhension between the fiber and resin is slightly better for MW cured composites compared with thermally cured composites.

关 键 词：微波固化 玻璃纤维 环氧树脂 固化行为 力学性能 

分 类 号：TQ327.1[化学工程—合成树脂塑料工业]