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采用微波固化技术,对玻璃纤维缠绕复合材料进行了固化试验研究。综合运用DSC、FT-IR、SEM和力学性能测试等方法手段,分析了材料的固化行为、微观形态及力学性能,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81%的固化周期;微波固化过程中并未引入新的化学反应,且两种固化方式下,复合材料具有相似的玻璃化转变温度(Tg);微波固化试样的拉伸强度要高于热固化试样约5%,而层间剪切强度及纤维-基体界面粘接情况与热固化试样相当;相比于热固化复合材料,微波固化复合材料的力学性能离散程度较低。
Using microwave curing technology, the glass fiber wound composite material was cured experiment. The curing behavior, microstructure and mechanical properties of the materials were analyzed by means of DSC, FT-IR, SEM and mechanical properties testing. The results were compared with the thermosetting specimens. The results show that microwave curing can significantly increase the curing reaction rate, shortening the curing cycle by 81% compared with the thermal curing; the microwave curing process does not introduce new chemical reactions, and the two curing methods, the composite material has a similar glass (Tg). The tensile strength of the microwave-cured samples is about 5% higher than that of the thermoset samples, while the interlaminar shear strength and fiber-matrix interface adhesion are comparable to those of the thermoset samples. Thermosetting composites, microwave-cured composites have lower mechanical properties.