Bismaleimide composite material based on disulfide bond and Diels-Alder reaction and preparation method thereof
A technology of bismaleimide and composite material is applied in the field of bismaleimide composite material and its preparation, and can solve the problem of not being able to achieve both self-healing properties and mechanical properties of thermosetting resins and the like
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Embodiment 1
[0035] A kind of preparation method based on the bismaleimide composite material of disulfide bond and Diels-Alder reaction, comprises the following steps:
[0036] Step 1: Disperse 22 parts of 1,2-bis(maleimide)ethane and 5 parts of 4,4'-diaminodiphenyl disulfide in acetone, react at 130°C for 60 minutes, and remove Solvent, obtains bismaleimide prepolymer;
[0037] Step 2: Mix bismaleimide prepolymer, 4 parts of furroin and 14 parts of diallyl bisphenol A for polymerization reaction, and react at 130°C for 90 minutes to obtain bismaleimide copolymer ;
[0038] Step 3: Pour the bismaleimide copolymer into a preheated mold at 150°C, place it in a vacuum drying oven at 150°C, vacuumize to remove air bubbles, and take it out until there are no air bubbles; then, place it in a Blast drying oven for stage temperature rise curing. The curing process is 150°C / 2h+180°C / 2h+220°C / 2h+80°C / 8h, and finally, after natural cooling, the bismaleimide composite material based on the disulfi...
Embodiment 2
[0041] A kind of preparation method based on the bismaleimide composite material of disulfide bond and Diels-Alder reaction, comprises the following steps:
[0042] Step 1: 54 parts of N,N'-1,3-phenylene bismaleimide and 9 parts of 3,3'-dithiodipropionic acid dihydrazide in N,N-dimethylformamide Disperse evenly in the medium, react at 140°C for 40 minutes, and remove the solvent to obtain a bismaleimide prepolymer;
[0043] Step 2: Bismaleimide prepolymer, 26 parts of ethane-1,2-diylbis(3-((furan-2-ylmethyl)thio)-2-methylpropionate ) and 25 parts of diallyl bisphenol A were mixed for polymerization, and reacted at 140° C. for 45 minutes to obtain a bismaleimide copolymer;
[0044] Step 3: Pour the bismaleimide copolymer into a preheated mold at 150°C, place it in a vacuum drying oven at 150°C, vacuumize to remove air bubbles, and take it out until there are no air bubbles; then, place it in a Blast drying oven for stage temperature rise curing. The curing process is 150°C / 2...
Embodiment 3
[0047] A kind of preparation method based on the bismaleimide composite material of disulfide bond and Diels-Alder reaction, comprises the following steps:
[0048] Step 1: Disperse 72 parts of 4,4'-bismaleimidodiphenylmethane and 14 parts of 3,3'-dithiodipropionic acid dihydrazide in chloroform and react at 150°C for 20 minutes , and remove the solvent to obtain a bismaleimide prepolymer;
[0049] Step 2: Bismaleimide prepolymer, 26 parts of ethane-1,2-diylbis(3-((furan-2-ylmethyl)thio)-2-methylpropionate ) and 16 parts of diallyl bisphenol A were mixed for polymerization, and reacted at 150°C for 50 minutes to obtain a bismaleimide copolymer;
[0050] Step 3: Pour the bismaleimide copolymer into a preheated mold at 150°C, place it in a vacuum drying oven at 150°C, vacuumize to remove air bubbles, and take it out until there are no air bubbles; then, place it in a Blast drying oven for stage temperature rise curing. The curing process is 150°C / 2h+180°C / 2h+220°C / 2h+80°C / 8h,...
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