Polyetheretherketone oligomer, and preparation method and application thereof
A polyetheretherketone and oligomer technology, which is applied in the field of liquid crystal display device related materials, can solve the problems of inconvenience and safety in operation, and achieve the effects of convenient and flexible temperature control, wide temperature range, and improved operability.
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Embodiment 1
[0045] 4,4'-dihydroxy-(4,4'-diphenoxy)benzophenone (3.98g, 0.01mol), 4-nitrophthalonitrile (3.64g, 0.02mol), anhydrous carbonic acid Potassium (5.52g, 0.04mol) and N,N-dimethylformamide (DMF) (25ml) were put into a 100ml three-necked flask equipped with nitrogen vent, magnetic stirring, and drying tube, and reacted at room temperature for 24 hours . Then it is discharged into 0.1 mol / L hydrochloric acid aqueous solution, boiled in hot water, washed repeatedly with ethanol and deionized water, and dried to obtain a nitrile group-terminated monomer in the form of a white powdery solid with a yield of 90%. Its melting point is 234°C.
[0046] The chemical structural formula of the product obtained is as follows:
[0047]
[0048] The infrared spectrum of the obtained product is as figure 1 shown. 2235cm in the infrared spectrum -1 The characteristic absorption peak at proves the existence of -CN, and the 3000cm -1 There is no characteristic absorption peak representing -...
Embodiment 2
[0051]4,4'-dihydroxybenzophenone (3.21g, 0.015mol), 4-nitrophthalonitrile (5.71g, 0.033mol), anhydrous potassium carbonate (4.14g, 0.03mol), N,N -Dimethylformamide (DMF) (20ml) was put into a 100ml three-necked flask equipped with a nitrogen vent, magnetic stirring, and a drying tube, and reacted at room temperature for 24 hours. Then discharge into 0.1mol / L hydrochloric acid aqueous solution, after boiling in hot water, wash and dry repeatedly with ethanol and deionized water, obtain crosslinkable nitrile group-terminated monomers, which are white powdery solids, yield 95%. Its melting point is 186°C.
[0052] The chemical structural formula of the product obtained is as follows:
[0053]
[0054] The obtained monomer is heat-cured at 250±5° C. for 4 hours, and a cross-linking curing agent is added to obtain a polyetheretherketone oligomer through cross-linking.
Embodiment 3
[0056] 4-fluoro-4-hydroxybenzophenone (2.16g, 0.01mol), 4-nitrophthalonitrile (5.71g, 0.033mol), anhydrous potassium carbonate (4.14g, 0.03mol), dimethyl Sulfoxide (DMSO) (20ml) was put into a 100ml three-necked flask equipped with a nitrogen vent, a magnetic stirrer, and a drying tube, and reacted at room temperature for 24 hours. Then it is discharged into 0.1mol / L hydrochloric acid aqueous solution, after being boiled in hot water, washed repeatedly with ethanol and deionized water, and dried to obtain a cross-linkable monomer terminated by fluorine and nitrile groups, which is a white powdery solid. Yield 90%. Its melting point is 143°C.
[0057] The chemical structural formula of the product obtained is as follows:
[0058]
[0059] The obtained monomer is heat-cured at 270±5° C. for 4 hours, and a cross-linking curing agent is added to obtain a polyetheretherketone oligomer through cross-linking.
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