Organic fiber cloth filled polymethylmethacrylate composite plate material and its preparation method
A technology of polymethyl methacrylate and methyl methacrylate, applied in the field of composite materials, can solve the problems of poor impact resistance, low hardness, general strength of polymethyl methacrylate, etc. improved effect
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Embodiment 1
[0019] Add 15g of benzoyl peroxide to 1000g of methyl methacrylate and mix evenly, keep warm at 80°C for 10 minutes, vacuum degassing to obtain a prepolymer with moderate viscosity; cut 200g of PA6 fiber cloth and fix it on In the mold, seal the mold. Draw the prepolymer into the mold with negative pressure, feed the material slowly, and keep it warm at 50°C for 10 hours to obtain a semi-finished product after the infiltration is complete; take the semi-finished product out of the mold and put it on a flat vulcanizing machine, and control the pressure at 1MPa to make the PA6 fiber The content of the cloth is kept at about 10%, the temperature is kept at 120° C. for 1 hour, and it is cooled to room temperature to obtain the PA6 fiber cloth-filled polymethyl methacrylate composite sheet.
Embodiment 2
[0021] Add 15g of benzoyl peroxide to 1000g of methyl methacrylate and mix evenly, keep warm at 80°C for 2 minutes, vacuum degassing to obtain a prepolymer with moderate viscosity; cut 300g of PA66 fiber cloth and fix it on In the mold, seal the mold. Draw the prepolymer into the mold by using negative pressure, slowly feed the material, after the infiltration is complete, keep it warm at 50°C for 8 hours to obtain a semi-finished product; take the semi-finished product out of the mold, put it on a flat vulcanizing machine, control the pressure at 5MPa, and make the PA66 fiber cloth The content of polymethyl methacrylate is kept at about 50%, heat preservation at 120°C for 2 hours, and cool to room temperature to obtain PA66 fiber cloth filled polymethyl methacrylate composite board.
Embodiment 3
[0023] Add 15g of benzoyl peroxide to 1000g of methyl methacrylate and mix evenly, keep warm at 80°C for 10 minutes, vacuum degassing to obtain a prepolymer with moderate viscosity; cut 200g of PET fiber cloth and fix it on In the mold, seal the mold. Draw the prepolymer into the mold by using negative pressure, slowly feed the material, after the infiltration is complete, keep it warm at 50°C for 5 hours to obtain a semi-finished product; take the semi-finished product out of the mold, put it on a flat vulcanizing machine, control the pressure at 5MPa, and make the PET fiber cloth The content is kept at about 40%, heat-preserved at 120° C. for 2 hours, and cooled to room temperature to obtain a PET fiber cloth-filled polymethyl methacrylate composite board.
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