Preparation method of powdered acrylonitrile-butadiene rubber with high performance
A powdered nitrile rubber, high-performance technology, applied in the field of preparation of high-performance powdered nitrile rubber, can solve the problems of high ash content of powdered rubber and inactivation of the surface of carbon nanotubes, and achieves easy powder formation and shortened polymerization time. , the effect of the simple method
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Embodiment 1
[0035] ① Dispersion of carbon nanotubes: Add 100 parts of carbon nanotubes into the high-speed disperser, add 500 parts of water, start stirring for 30 minutes, so that the carbon nanotubes are evenly dispersed. ②Preparation of rapid polymerization latex: Add 100 parts of water, 30 parts of acrylonitrile, and 5 parts of emulsifier into the polymerization kettle, and pass nitrogen gas to test the pressure. After confirming that there is no leakage in the polymerization kettle, replace it with nitrogen several times, and then add butadiene 70 parts, 0.1 parts of cross-linking agent, start the polymerization tank to stir, then pass cold water into the polymerization tank to cool down, when the temperature of the polymerization tank drops to 10°C, add 0.2 parts of initiator and 0.4 parts of molecular weight regulator, and the polymerization reaction temperature is controlled At 10°C, the polymerization reaction time was controlled at 10 hours, and when the monomer conversion rate w...
Embodiment 2
[0039] ① Dispersion of carbon nanotubes: Add 100 parts of carbon nanotubes into the high-speed disperser, add 1500 parts of water, start stirring for 40 minutes, so that the carbon nanotubes are evenly dispersed. ②Preparation of rapid polymerization latex: add 200 parts of water, 35 parts of acrylonitrile, and 10 parts of emulsifier into the polymerization kettle, and pass nitrogen gas to test the pressure. After confirming that there is no leakage in the polymerization kettle, replace it with nitrogen several times, and then add butadiene 65 parts, 0.2 parts of cross-linking agent, start the polymerization tank to stir, then pass cold water into the polymerization tank to cool down, when the temperature of the polymerization tank drops to 20°C, add 0.3 parts of initiator and 0.5 parts of molecular weight regulator, and the polymerization reaction temperature is controlled At 20°C, the polymerization reaction time was controlled at 5 hours, and when the monomer conversion rate ...
Embodiment 3
[0043] ① Dispersion of carbon nanotubes: Add 100 parts of carbon nanotubes into the high-speed disperser, add 2000 parts of water, start stirring for 20 minutes, so that the carbon nanotubes are evenly dispersed. ②Preparation of rapid polymerization latex: Add 300 parts of water, 45 parts of acrylonitrile, and 15 parts of emulsifier into the polymerization kettle, and pass nitrogen gas to test the pressure. After confirming that there is no leakage in the polymerization kettle, replace it with nitrogen several times, and then add butadiene 55 parts, 0.5 parts of cross-linking agent, start the polymerization tank to stir, then pass cold water into the polymerization tank to cool down, when the temperature of the polymerization tank drops to 25°C, add 0.5 parts of initiator and 0.8 parts of molecular weight regulator, and the polymerization reaction temperature is controlled At 25° C., the polymerization reaction time was controlled at 8 hours, and when the monomer conversion rat...
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