【摘要】 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。更多还原

【Abstract】 The hydrothermal properties of unidirectional reinforcement composite laminates T700/5429 are presented in this paper.T700/5429 laminate are made by autoclave,the specimens were soaked at temperature of 45℃ and 85℃ in water bath for a period of 90 days.FT-IR,moisture absorption rate,the flexural and in-plane compressive strengths were measured and analyzed before and after immersed.The results showed that the new absorption peaks of resin matrix did not appear for their FT-IR,the moisture absorption of composite belongs to diffusion behavior and could be described by Fick’s Law.The relations of the flexural and in-plane compressive strength of the composites with immersion time is not linear,that is fractal.The fractal dimension of flexural strength is 1.10(45℃),1.07(85℃),and the fractal dimension of in-plane compressive strength is 1.04(45℃),1.05(85℃).It is showed that the changes of flexural and in-plane compressive strength of composite between immersion time have some degree of complexity.更多还原