Preparation of Medium-temperature Epoxy/S6 Grade High-strength Glass Fiber Thin Layer Fabric Prepreg and Study on its Composite Material Properties
A new type of medium temperature epoxy toughened resin system ACTECH®1213 has been developed,and its rheological properties,curing reaction characteristics,and heat resistance have been studied.Using domestically produced S6 grade high-strength glass fiber thin layer fabric as the reinforcing material,a thin layer fabric prepreg was successfully prepared by a two-step hot melt method.The prepared prepreg has good process performance,indicating that the resin system has good compatibility with S6 grade high-strength glass fiber thin layer fabric.Composite laminates were prepared using autoclave molding,and the cured ply thickness can reach 0.048 mm.In addition,the mechanical properties of the composite laminates were studied.The composite materials exhibited good room temperature mechanical properties and compression after impact properties,with a longitudinal tensile strength of 705 MPa and CAI of 275 MPa.Compared with the existing medium temperature epoxy composite materials which are reinforced by electric glass fiber thin layer fabric,the static strength of high-strength glass fiber thin layer fabric composite materials is more than 60%higher.Finally,we successfully achieved the domestic development of medium temperature epoxy/S6 grade high-strength glass fiber thin layer fabric prepreg.
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