Abstract
The purpose of this work is to improve the interfacial bonding performance of traditional sandwich damping composite. The glass fiber reinforced damping composites with four different damping film thickness were prepared by introducing the interface reaction between damping polymer and resin matrix. The co-cured damping composite specimen is composed of sandwich damping film (0.1 mm–0.4 mm) and upper and lower skin (1 mm). The outstanding characteristic of the co-cured damping composite is that the resin matrix and damping material maintain the same reaction process. The interface bonding behaviors were experimentally investigated using interfacial shear strength test and microstructure analysis. The interfacial shear strength of specimens with the damping layer thickness of 0.1, 0.2, 0.3, and 0.4 mm was increased by 72.55%, 51.29%, 47.30% and 36.39% compared with traditional damping sandwich composite. It was found that the interfacial shear strength was significantly enhanced by interleaving the tailored damping material. The analysis exhibited that sandwich damping layer and lamina were well combined. The FTIR and XPS characterization showed that rubber and resin were chemically bonded at the interface, which further explained the interface bonding mechanism. The results reveal that the novel damping composites show a broad application prospect.
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