分别采用热固化、微波固化及微波和热组合固化3种方式对双酚A环氧树脂/4,4'二氨基二苯甲烷(DDM)体系进行了固化试验研究,用红外光谱法(FT-IR)、差示扫描量热仪(DSC)、扫描电镜(SEM)等分析其固化行为及微观形态表征,对固化试样进行了力学性能测试.研究结果表明,微波固化能显著提高体系的固化反应速率,缩短凝胶化时间,微波固化及微波和热组合固化达到完全的时间仅分别为0.9h和1.5h,微波固化产物具有比热固化产物高的玻璃化转变温度(Tg)；组合固化试样的拉伸强度能达到热固化试样的95％以上,但微波固化试样拉伸强度仅为热固化试样的80％,扫描电镜分析表明微波固化产物在微观形态上与热固化及组合固化产物有较大差别.%Curing of the epoxy resin system of di-glycidyl ether of bisphenol-A( DGEBA) with curing agent of 4,4' diamino-di-phenyl-methane(DDM) was studied using three methods,i. e. microwave, conventional oven and combined method. Curing behaviors and mechanical properties of epoxy resin system were investigated through a number of techniques including differential scanning calorimetry (DSC) , fourier transform infrared spectrometer (FTIR) and scanning electron microscope (SEM). Results show that polymerization reaction occurs at a faster rate during microwave heating than that in conventional oven heating thus reduces the gelation and cure time, the completely cure time of the microwave and the combined method is 0.9 h and 1.5 h respectively. Analysis of DSC reveals higher glass transition temperature( Tg) in microwave processing compared with conventional oven heating. The tensile strength of specimens cured by combined method is similar to that of conventional thermal, while microwave-cured specimens owns lower mechanical properties. Finally, scanning electron microscope was used to analyze the morphology of cured specimens and it is found that the microstructure of microwave-cured materials differs obviously from thermal-cured materials.
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