A kind of polymer containing sulfoxide group and its preparation method
A technology of sulfoxide groups and polymers, which is applied in the field of polymers containing sulfoxide groups and its preparation, can solve the problems of high crosslink density, poor toughness of polymers, and insufficient toughness of products, and achieve good heat resistance , High thermal stability, excellent heat resistance effect
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[0041] The present invention provides the preparation method of the polymer containing sulfoxide group described in above-mentioned technical scheme, comprises the following steps:
[0042] Mix the dihalogen monomer, bisphenol monomer, organic solvent, water-carrying agent and salt-forming agent, and perform a salt-forming reaction to obtain a salt-forming reaction system;
[0043] Carrying out polycondensation reaction of the salt-forming reaction system to obtain a polycondensation polymer;
[0044] Heat-treating the polycondensation polymer to obtain a polymer with a structure shown in formula I;
[0045] When n=1-400 in formula I, the bisphenol monomer is a mixture of the first bisphenol monomer and the second bisphenol monomer, and the first bisphenol monomer is 4,4'-dihydroxy Diphenylsulfoxide, the second bisphenol monomer is 4,4'-dihydroxydiphenylpropane, 4,4'-dihydroxybenzophenone, 2,2-bis(4-hydroxyphenyl)hexa Fluoropropane, 2,2'-dihydroxybiphenyl, 4,4'-dihydroxybiph...
Embodiment 1
[0056] Add 0.075mol 4,4'-dihydroxydiphenyl sulfoxide, 0.075mol 4,4'-difluorobenzophenone, 0.1125mol of potassium carbonate, 25mL of toluene, and 92.745g of sulfolane make the solid content of the reaction system 25%. Under the protection of nitrogen, the temperature of the reaction system is raised to 130°C at a rate of 3°C / min for a salt-forming reaction. During the process, water was slowly carried out from the system, and the whole process lasted for 5 hours to obtain a salt-forming reaction system; when no water was carried out from the water separator, the temperature was raised to 190°C at a rate of 2°C / min for 6 hours of polymerization. After the polymerization reaction is finished, discharge the material into deionized water while it is hot, and obtain white silk strands after fully cooling, and obtain white powder after pulverizing with a high-speed pulverizer, and boil 8 times with deionized water to remove excess solvent and solvent. salt in water, and then washed 4...
Embodiment 2
[0062] Add 0.075mol 4,4'-dihydroxydiphenylsulfoxide, 0.075mol 4,4'-dichlorodiphenylsulfone, 0.1125mol of potassium carbonate, 25mL of toluene, and 102.1281g of sulfolane make the solid content of the reaction system 25%. Under the protection of nitrogen, the reaction system is heated up to 140°C at a rate of 4°C / min for a salt-forming reaction. During the process, water was slowly carried out from the system, and the whole process lasted for 4 hours to obtain a salt-forming reaction system; when no water was carried out from the water separator, the temperature was raised to 195°C at a rate of 3°C / min for 7 hours of polymerization. After the polymerization reaction is over, take it out in deionized water while it is hot, and obtain white filaments after fully cooling, grind it with a high-speed pulverizer to obtain a white powder, and boil it 8 times with deionized water to remove excess solvent and dissolve in salt of water, and then washed 3 times with ethanol to remove unre...
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