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用热压罐法制备了单向碳纤维增强双马来酰亚胺树脂基(T700/5429)复合材料层压板。在45、85℃水浴的湿热环境下,对层压板进行了90 d的浸泡,测试了浸泡前后的红外吸收光谱、吸湿率、弯曲和面内压缩强度。结果表明:浸泡90 d后树脂基体未出现新的吸收峰;其吸湿率变化是扩散行为并可用菲克扩散定律描述;其弯曲和面内压缩强度随浸泡时间的变化是非线性的,即分形的,其中弯曲强度变化的分形维数45℃时为1.10、85℃时为1.07,面内压缩强度变化的分形维数45℃时为1.04、85℃时为1.05,说明复合材料弯曲强度和面内压缩强度随浸泡时间的变化具有一定的复杂性。
Unidirectional carbon fiber reinforced bismaleimide resin (T700 / 5429) composite laminates were prepared by autoclave method. The laminate was immersed for 90 d in a hot and humid environment of 45 and 85 ° C water bath. Infrared absorption spectra, moisture absorption, bending and in-plane compressive strength before and after immersion were tested. The results show that no new absorption peak appears on the resin matrix after soaking for 90 days. The change of moisture absorption rate is diffusion behavior and can be described by Fick’s diffusion law. The bending and in-plane compressive strength are nonlinear with the change of immersion time, , In which the fractal dimension change of bending strength is 1.10 at 45 ℃, 1.07 at 55 ℃, 1.04 at 45 ℃, 1.05 at 45 ℃, 1.05 at 45 ℃, which shows that the flexural strength and in-plane Compressive strength changes with immersion time has some complexity.