Abstract: In this paper, the surface sizing agent was removed by ablation method, and the surface grafting coupling agent was used to treat the quartz fiber with different surface treatment. Composite laminates were fabricated using different quartz fiber/PAA resin systems. The bending, interlaminar shear and compression properties were tested. The fiber infiltration, mechanical properties and cross-section morphology were compared by comparing different surface treatments. The effects of different surface treatment methods on the interfacial bonding properties of quartz fiber and PAA resin were investigated. The results show that the fiber of the sizing agent is removed, the capillary pressure value is reduced, the wetting ability of the resin to the fiber is reduced, and the wetting angle of the PAA resin and the quartz fiber is increased. The interface bonding force is lowered, and the mechanical properties of the composite material are lowered after curing. Moreover, the fiber on the fracture surface of the composite material is smooth and the resin has less adhesion. With the Wolla modified fiber, the capillary pressure value increases and the resin′s ability to infiltrate the fiber increases. At the same time, the wetting angle of PAA resin and quartz fiber is reduced, the interfacial bonding performance of quartz fiber and PAA resin is effectively improved, the mechanical properties of the composite material are improved, and the resin adhering to the fracture surface of the composite material is obviously increased.

Key words: polyarylacetylene resin, composites, modification of quartz fibers, infiltration, capillary pressur