A kind of polyhexahydrotriazine thermosetting resin containing aromatic amide structure and preparation method thereof
A polyhexahydrotriazine and aromatic amide technology, which is applied in the field of intrinsically thermally conductive polyhexahydrotriazine resin and its preparation, can solve the problems of restricting development, high thermal conductivity, high heat resistance temperature of thermosetting resin, recyclable recycling, and inability to two problems such as sub-molding or recycling, to achieve excellent thermal conductivity
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Embodiment 1
[0033] 120mmol of paraformaldehyde and 20ml of N-methylpyrrolidone / water mixed solvent were prepared into a suspension, stirred and reacted at 80°C for 0.5 hour for depolymerization, and cooled to room temperature to obtain a formaldehyde reaction liquid. 60mmol 4,4'-diaminobenzanilide Dissolve in 60ml of N-methylpyrrolidone to obtain an aromatic amine reaction solution. Mix the above-mentioned formaldehyde reaction solution (containing 120mmol formaldehyde) with 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 50°C for 30 minutes for pre-polymerization, and further place the mixture on a horizontal glass plate coated on top, and dried at 100°C for 6 hours to obtain a sheet-like prepolymer. The prepolymer was put into a mold and hot-pressed at 200°C and 3MPa for 2 hours to obtain the light yellow and transparent target product. figure 1 It is the infrared spectrum of polyhex...
Embodiment 2
[0035] 120mmol of paraformaldehyde and 20ml of N-methylpyrrolidone / water mixed solvent were prepared into a suspension, stirred and reacted at 80°C for 0.5 hour for depolymerization, and cooled to room temperature to obtain a formaldehyde reaction liquid. 60mmol 3,3′-diaminobenzanilide Dissolve in 60ml of N-methylpyrrolidone to obtain an aromatic amine reaction liquid. Mix the above-mentioned formaldehyde reaction solution (containing 120mmol formaldehyde) with 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 50°C for 30 minutes for pre-polymerization, and further place the mixture on a horizontal glass plate coated on top, and dried at 100°C for 6 hours to obtain a sheet-like prepolymer. The prepolymer was put into a mold and hot-pressed at 200°C and 3MPa for 2 hours to obtain the light yellow and transparent target product. The thermal conductivity is 0.42W / (m K), the tens...
Embodiment 3
[0037] 120mmol of paraformaldehyde and 20ml of N-methylpyrrolidone / water mixed solvent were prepared into a suspension, stirred and reacted at 80°C for 0.5 hour for depolymerization, and cooled to room temperature to obtain a formaldehyde reaction liquid. 60mmol N,N'-bis(4-aminophenyl)terephthalamide Dissolve in 60ml of N-methylpyrrolidone to obtain an aromatic amine reaction solution. Mix the above-mentioned formaldehyde reaction solution (containing 120mmol formaldehyde) with 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 50°C for 30 minutes for pre-polymerization, and further place the mixture on a horizontal glass plate coated on top, and dried at 100°C for 6 hours to obtain a sheet-like prepolymer. The prepolymer was put into a mold and hot-pressed at 200°C and 3MPa for 2 hours to obtain the light yellow and transparent target product. The thermal conductivity is 0.53...
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