Continuous fiber reinforced thermosetting resin matrix composite material and preparation method thereof
A composite material and continuous fiber technology, applied in the field of thermosetting polymer composite materials, can solve the problems of inability to melt and plasticize, waste of resources, difficult recycling of composite materials, etc., and achieve the effect of excellent mechanical and heat resistance properties
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Embodiment 1
[0034] 120mmol of paraformaldehyde and 30ml of N-methylpyrrolidone / water mixed solvent were prepared into a suspension, stirred and reacted at 80°C for 30 minutes for depolymerization, and cooled to room temperature to obtain a formaldehyde reaction liquid. Dissolve 60 mmol of aromatic diamine ODA in 70 ml of N-methylpyrrolidone to obtain an aromatic amine reaction liquid. Mix the formaldehyde reaction solution and the aromatic amine reaction solution evenly (the volume content of water in the mixed solvent of the final reaction system is 5%), stir and react at 50° C. for 30 minutes for prepolymerization, and obtain a prepolymer solution. Pour the prepolymer solution into the dipping tank, impregnate the continuous carbon fiber plain cloth (T300-1k) through the glue tank, wind it on the metal frame, put it in an oven at 100°C for 6 hours, remove the solvent, and cool naturally to room temperature. Cut according to mold size. According to the required thickness of the materia...
Embodiment 2
[0036]100mmol of paraformaldehyde and 25ml of dimethylformamide / water mixed solvent were prepared into a suspension, stirred and reacted at 100°C for 10 minutes for depolymerization, and cooled to room temperature to obtain a formaldehyde reaction liquid. Dissolve 50 mmol of aromatic diamine MDA in 75 ml of dimethylformamide to obtain an aromatic amine reaction solution. Mix the formaldehyde reaction solution and the aromatic amine reaction solution evenly (the volume content of water in the mixed solvent of the final reaction system is 10%), stir and react at 80° C. for 3 minutes for prepolymerization, and obtain a prepolymer solution. Pour the prepolymer solution into the dipping tank, impregnate the continuous carbon fiber plain cloth (T700S-12k) through the glue tank, wind it on the metal frame, put it in an oven at 80°C for 12 hours, remove the solvent, and cool naturally to room temperature. Cut according to mold size. According to the required thickness of the materia...
Embodiment 3
[0038] 200mmol of paraformaldehyde and 50ml of 2,5-dimethylfuran / water mixed solvent were prepared into a suspension, stirred and reacted at 70°C for 60 minutes for depolymerization, and cooled to room temperature to obtain a formaldehyde reaction liquid. Dissolve 100 mmol of aromatic diamine SDA in 130 ml of 2,5-dimethylfuran to obtain an aromatic amine reaction liquid. Mix the formaldehyde reaction liquid and the aromatic amine reaction liquid evenly (the volume content of water in the mixed solvent of the final reaction system is 20%), stir and react at 50° C. for 8 minutes for prepolymerization, and obtain a prepolymer solution. Pour the prepolymer solution into the dipping tank, impregnate the continuous carbon fiber unidirectional fabric (T700SC) through the glue tank, wind it on the metal frame, put it in an oven at 150°C for 0.5 hours, remove the solvent, and cool naturally to room temperature. Cut according to mold size. According to the required thickness of the ma...
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