Effect of cyclic hygrothermal aging and drying temperature on the interfacial properties of BMI/Carbon fiber composite

摘要

In aerospace and other applications, fiber-reinforced polymer matrix composites' performance in 'hot-wet' environments is an important assessment indexes. Polymer-based materials are often exposed to hygrothermal environments, where water molecules can easily migrate into the polymeric matrix and reached at the interface between fiber and matrix resin. Some physical and chemical variations generate with immersing of water. Physical changes such as micro-cracks propagation and swelling, as well as chemical changes such as hydrolysis and chemical scission can degrade properties of the materials. Also, the fiber/matrix interface can be damaged by moisture absorption because resin is easy to absorb water which leads to volume expansion, while carbon fiber is hard to absorb water, and the resin's swelling generates stress and can cause interface debonding.