A composite material with low dielectric constant and low dielectric loss, its preparation method and application
A technology of low dielectric constant and composite materials, which is applied in composite materials and its preparation, and the application field of preparing 5G mobile phone antenna materials, which can solve the problems affecting the application of 5G mobile phone antennas, the difficulty of optimal moisture absorption performance, and the environmental pollution of organic solvents, etc. problems, to achieve the effect of controllable product structure, simple and feasible reaction process, and suppress hygroscopicity
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Embodiment 1
[0052]Before the polymerization reaction, place a 10mL high-pressure reactor in an oven at 110°C for 4 hours to remove moisture, then place it in a glove box and cool it to room temperature; add zinc-cobalt double metal cyanide complex (Zn-Co( III) DMCC), trifluoropropylene oxide (TFPO), maleic anhydride (MA) (the molar ratio of TFPO to MA is 1:2) and 2 mL of tetrahydrofuran, and the molar ratio of catalyst to TFPO is 1:100. After the reactor was closed and taken out from the glove box, it was filled with carbon oxysulfide (COS) at room temperature, the molar ratio of COS to TFPO was 1.2:1, and placed in an oil bath at 30°C for 2 hours. After the reaction, the product was taken out from the reaction kettle and dissolved in dichloromethane, and then the polymer was precipitated in a mixed solvent of ethanol / deionized water, washed three times, dried in vacuum to constant weight, and then hot-pressed at 120°C for 15 minutes , the sulfur-containing polymer can be obtained.
Embodiment 2
[0054] Before the polymerization reaction, put the 10mL autoclave in an oven at 110°C for 4h to remove moisture, then place it in a glove box and cool it to room temperature; add salicylaldehyde diimide chromium chloride complex (salen. CrCl), 3-(2,2,3,3-tetrafluoropropoxy)-1,2-propylene oxide (TFPP), maleic anhydride (MA) (the molar ratio of TFPP to MA is 1:2) and 2mL tetrahydrofuran, the molar ratio of catalyst to TFPP is 1:200. After the reactor was closed and taken out from the glove box, it was filled with carbon oxysulfide (COS) at room temperature, the molar ratio of COS to TFPP was 1.2:1, and placed in an oil bath at 40°C for 6 hours. After the reaction, the product was taken out from the reaction kettle and dissolved in dichloromethane, and then the polymer was precipitated in a mixed solvent of ethanol / deionized water, washed three times, dried in vacuum to constant weight, and then hot-pressed at 120°C for 15 minutes , the sulfur-containing polymer can be obtained....
Embodiment 3
[0056] Before the polymerization reaction, put the 10mL autoclave in an oven at 110°C for 4h to remove moisture, then place it in a glove box and cool it to room temperature; add salicylaldehyde diimide cobalt chloride complex (salen. CoCl), hexafluoropropylene oxide (TFTO), maleic anhydride (MA) (the molar ratio of TFTO to MA is 1:2), and 2 mL of tetrahydrofuran, and the molar ratio of catalyst to TFTO is 1:300. After closing the reactor and taking it out from the glove box, it was filled with carbon oxysulfide (COS) at room temperature, the molar ratio of COS to TFTO was 1.2:1, and placed in an oil bath at 50°C for 10 h. After the reaction, the product was taken out from the reaction kettle and dissolved in dichloromethane, and then the polymer was precipitated in a mixed solvent of ethanol / deionized water, washed three times, dried in vacuum to constant weight, and then hot-pressed at 120°C for 15 minutes , the sulfur-containing polymer can be obtained.
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