PMI泡沫夹芯复合材料湿热老化性能研究  

STUDY ON HYGROTHERMAL AGEING OF PMI FOAM CORED SANDWICH COMPOSITE

作　　者：尹亮[1] 郑国栋[1] 丁常方 朱元喆 林琳[1] 

机构地区：[1]航天材料及工艺研究所,北京100076

出　　处：《玻璃钢／复合材料》2015年第8期5-9,共5页Fiber Reinforced Plastics/Composites

摘　　要：通过对夹芯结构复合材料湿热老化性能的研究,探究环境对夹芯结构复合材料性能的影响。实验中采用了聚甲基丙烯酰亚胺(PMI)、玻璃纤维增强环氧树脂(SW110C/608)复合材料面板制备了PMI泡沫夹芯结构复合材料,研究了PMI泡沫夹芯结构复合材料的耐湿热老化特性,并讨论了湿热对PMI泡沫夹芯结构复合材料的压缩性能以及弯曲性能的影响。结果发现,PMI泡沫夹芯结构复合材料浸泡在水中时的饱和吸湿时间为30d,饱和吸水率为4.08%,通过Fick第二扩散定律发现水分子在PMI泡沫中的扩散系数为水分子在面板扩散系数的29.29倍,由于水分子的增塑作用以及浓度梯度扩散的影响,湿热处理后的PMI泡沫夹芯复合材料的平压强度下降了32.86%,侧压强度下降了16.73%,弯曲强度下降了23.94%。An experimental study was performed to investigate the hygrothermal ageing mechanisms of PMI foam cored sandwich composite. To determine the effects of marine environment on the properties of sandwich composites. The polymethacrylimide （PMI） foam cored sandwich structure was prepared by using PMI foam, E-glass/epoxy resin （SW110C/608） composite panel. The moisture absorption of PMI foam cored sandwich structure, composite panel and PMI foam were investigated, and the effect of the hydrothermal condition on the compressive and flexural properties of the PMI foam cored sandwich structure was also determined. The results indicate that the saturated hy- groscopic time of PMI foam cored sandwich structure is 30 days and its absorption ratio is 4. 08%. The absorption behavior follows Fickian diffusion behavior and the diffusion constant for foam is about 30 times greater than those for the composite panel. Due to concentration gradient and the plasticization of water, the decrease of flatwise compression strength, edgewise compression strength and flexural strength is 32. 86%, 16. 73% and 23.94%, respectively.

关 键 词：PMI泡沫 夹层复合材料 湿热老化 压缩性能 弯曲性能 

分 类 号：TB332[一般工业技术—材料科学与工程]