Halogen-free catalytic polyphenylene sulfide and preparation method thereof
A technology of polyphenylene sulfide and sodium sulfide, which is applied in the field of organic matter processing, and can solve problems such as secondary pollution, threats to health, and the environment
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Embodiment 1
[0027] A halogen-free catalytic polyphenylene sulfide is prepared from hydrogen sulfide, sodium hydroxide, dichlorobenzene, caprolactam, 6-aminocaproic acid, N-methylpyrrolidone, glycerol and antioxidants.
[0028] The preparation method of the halogen-free catalytic polyphenylene sulfide includes the following steps:
[0029] (1) Preparation of sodium sulfide
[0030] The hydrogen sulfide was passed into the reactor containing the sodium hydroxide solution with a concentration of 380 g / mL.
[0031] (2) Vacuum dehydration
[0032] The solution obtained by the reaction (1) is naturally volatilized to obtain sodium sulfide with crystal water, and the sodium sulfide with crystal water is put into the polymerization kettle, sealed and then evacuated, the vacuum degree is 0.096MPa, and then in the nitrogen gas It is heated and dehydrated under protection. The heating and dehydration is heating in sections. The temperature of the first section is 80°C and the time is 1.0h, and the temperatur...
Embodiment 2
[0044] A halogen-free catalytic polyphenylene sulfide is prepared from hydrogen sulfide, sodium hydroxide, dichlorobenzene, caprolactam, 6-aminocaproic acid, N-methylpyrrolidone, glycerol and antioxidants.
[0045] The preparation method of the halogen-free catalytic polyphenylene sulfide includes the following steps:
[0046] (1) Preparation of sodium sulfide
[0047] Pass hydrogen sulfide into a reactor containing a sodium hydroxide solution with a concentration of 400 g / mL.
[0048] (2) Vacuum dehydration
[0049] The solution obtained by the reaction (1) is naturally volatilized to obtain sodium sulfide with crystal water, and the sodium sulfide with crystal water is put into the polymerization kettle, sealed and then evacuated, the vacuum degree is 0.098MPa, and then it is protected by nitrogen It is heated and dehydrated under heating and dehydration is segmented heating. The temperature of the first stage is 82.5℃ and the time is 1.5h, and the temperature of the second stage is ...
Embodiment 3
[0061] A halogen-free catalytic polyphenylene sulfide is prepared from hydrogen sulfide, sodium hydroxide, dichlorobenzene, caprolactam, 6-aminocaproic acid, N-methylpyrrolidone, glycerol and antioxidants.
[0062] The preparation method of the halogen-free catalytic polyphenylene sulfide includes the following steps:
[0063] (1) Preparation of sodium sulfide
[0064] Pass hydrogen sulfide into a reactor containing a sodium hydroxide solution with a concentration of 420g / mL;
[0065] (2) Vacuum dehydration
[0066] The solution obtained by the reaction (1) is naturally volatilized to obtain sodium sulfide with crystal water, and the sodium sulfide with crystal water is put into the polymerization kettle, sealed and then evacuated, the vacuum degree is 0.1MPa, and then it is protected by nitrogen It is heated and dehydrated under heating and dehydration is heating in sections. The temperature of the first section is 85°C and the time is 2.0h, and the temperature of the second section i...
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