Preparation method of 1,2-polybutadiene rubber containing multiple ionic bond network
A polybutadiene rubber and ionic bond technology, which is applied in the field of preparation of 1,2-polybutadiene rubber, can solve the problems of single type of internal ionic bond, single type of ionic bond, high price of graphene, etc. The effect of easy aggregation, improved compatibility, and simple modification method
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[0053] Preparation of organomontmorillonite OMMT:
[0054] Montmorillonite MMT (20 g) was dispersed in 1 L of deionized water, heated to 80° C. and stirred for 2 hours. Slowly add 18mmol organic modifier aqueous solution into the MMT suspension and stir for 3 hours, and adjust the pH value to 3-5. After the reaction was terminated, the suspension was filtered and washed with deionized water until the concentration of AgNO was 0.1M 3 Bromide ions were not detected. The product was vacuum-dried at 80°C to constant weight and ground into powder for further use. Wherein the montmorillonite can be one or more of calcium base, sodium base, sodium-calcium base and magnesium base montmorillonite, and the organic modifier is hexadecyltrimethylammonium bromide, cetyl trimethyl ammonium bromide, One or more of octadecyltrimethylammonium chloride, cetylpyridinium chloride, and dodecyltrimethylammonium bromide.
Embodiment 1
[0056] Under a nitrogen atmosphere, the prepared OMMT and 2.6M butadiene n-hexane solution were added into the reactor and heated to 60° C., wherein the mass of OMMT was 4% of the mass of butadiene. Then, the molybdenum-based catalyst was injected into the reactor, and the molar ratio of butadiene, molybdenum pentachloride, trimethylaluminum and triethyl phosphate was 5000:1:10:2. At the beginning of the reaction, because OMMT is insoluble in n-hexane, OMMT will sink to the bottom of the reactor. At this time, the reactor is placed in a water bath at 60° C. for 0.5 h. After 0.5h, the magnetic stirring was turned on to 300rpm and the reaction was continued for 5.5h. After the polymerization was terminated, the resulting nanocomposite was poured into boiling water to obtain a precipitate, which was vacuum-dried at 80 °C to constant weight.
[0057] The obtained in-situ polymerized 100phr OMMT / HVBR nanocomposites were blended with 25phr zinc methacrylate (ZDMA) and 1phr dicumyl ...
Embodiment 2
[0059] Prepared by the same method as in Example 1, the difference is that the solvent of the butadiene solution is selected from n-pentane, the quality of OMMT is 0.5% of the butadiene quality, and the molybdenum compound is molybdenum tetrachloride, aluminum alkyl and phosphate are tripropylaluminum, bis(2-ethylhexyl) phosphate, butadiene, molybdenum compound, alkylaluminum and phosphate in a molar ratio of 5000:1:14:2, the obtained in situ Polymerized 100phr OMMT / HVBR nanocomposite.
[0060] ZDMA is 30phr, and in-situ-NC / ZDMA30 is prepared according to the above method.
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