Efficient joining of hybrid thermoset/thermoplastic composite joints is critical to produce high performance lightweight structures while keeping the cost low. Herein, a high-power UV-irradiation technique was proposed to rapidly active the surfaces of PEEK and PPS composites for the following co-cure joining with epoxy composites. A single lap-shear joint test and a double cantilever beam test were used to evaluate the mechanical and fracture performance of the hybrid joints. The experimental results revealed that high structural integrity of the hybrid joints was achieved upon applying a 6 s UV-treatment to the thermoplastic composites. For example, the lap-shear strength and fracture energy of the adhesive bonded hybrid joints were above 25 MPa and 800 J/m2, respectively. Overall, high-power UV-irradiation proved a highly efficient, rapid and low-cost method to treat thermoplastic composites for the co-cure joining with epoxy composites, and hence it demonstrated significant promise in industrial mass production.

中文翻译：

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环氧树脂复合材料与快速紫外线照射的 PEEK 和 PPS 复合材料的共固化连接，以实现高结构完整性

混合热固性/热塑性复合材料接头的有效连接对于生产高性能轻质结构同时保持低成本至关重要。在本文中，提出了一种高功率紫外线照射技术来快速活化 PEEK 和 PPS 复合材料的表面，用于随后与环氧树脂复合材料的共固化连接。使用单搭接剪切接头试验和双悬臂梁试验来评估混合接头的机械和断裂性能。实验结果表明，在对热塑性复合材料进行 6 s 紫外线处理后，混合接头的结构完整性很高。例如，胶粘混合接头的搭接剪切强度和断裂能分别高于 25 MPa 和 800 J/m2。总的来说，高功率紫外线照射被证明是一种高效、