Oil-extended styrene-butadiene rubber containing nano silicon dioxide on the surface, composition and preparation method thereof
A technology of nano-silica and oil-extended styrene-butadiene rubber, which is applied in the field of oil-extended rubber and its preparation, can solve the problems of narrow PSN molecular weight distribution, difficulty in processing and application, and quality loss, and achieve a good balance of physical properties, molecular weight and molecular weight The effect of proper distribution and loss factor reduction
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Embodiment 1
[0052] Surface functional modification of nano-silica: Weigh 150g of nano-silica and dry it in an oven for use, then mix it with 1500g of toluene and ultrasonically disperse fully, add 300g of hydrolyzed VTES, stir and heat to 82°C for 3 hours to reflux, It is then filtered, washed and dried in vacuum.
[0053] (1) Preparation of functional emulsion
[0054] The first step is the preparation of monomer pre-emulsion. 1,200 g of 1,3-butadiene, 120 g of sodium dodecylbenzenesulfonate, 1,800 g of deionized water, 12 g of sodium hydroxide, and 2.4 g of potassium persulfate were mixed and pre-emulsified for 20 minutes to prepare a pre-emulsion.
[0055] In the second step, the functional emulsion is prepared with the modified nano-silica as the core. Take 3.6g of nano-silica modified by surface functionalization and add it to a reactor containing 60g sodium dodecylbenzenesulfonate and 480g deionized water, stir and heat up to 60°C, and then take 313g monomer pre-emulsion Add it i...
Embodiment 2
[0065] According to the method disclosed in "Journal of Radiation Research and Radiation Technology", Volume 25, No. 5, "Study on Surface Modification of Nano-Silicon Dioxide and Radiation-Initiated Grafting GMA" in 2007, the nano-silicon dioxide method for surface functional modification: Weigh 10g of nano-silica and dry it in an oven at 50°C for 5 hours, add the dried nano-silica to an aqueous solution in which 98g of coupling agent MPS is dissolved, and ultrasonically disperse for 1 hour. After dispersion, the mixture was stirred at 110°C for 8h. After filtration, the modified silicon dioxide was washed with toluene, and the obtained product was vacuum filtered, extracted by Soxhlet, and finally dried in an oven.
[0066] (1) Preparation of functional emulsion
[0067] The first step is the preparation of monomer pre-emulsion. 1200 g of isoprene, 72 g of sodium lauryl sulfate, 1200 g of deionized water, 6 g of ammonia water, and 9.6 g of ammonium persulfate were mixed and...
Embodiment 3
[0078] Surface functional modification of nano-silica: Weigh 240g of nano-silica and dry it in an oven for use, then mix it with 4800g of xylene and ultrasonically disperse fully, add 312g of hydrolyzed VTMS, stir and heat to 93°C for 4 hours to reflux , then filtered, washed, and dried in vacuum.
[0079] (1) Preparation of functional emulsion
[0080] The first step is the preparation of monomer pre-emulsion. Prepare by mixing 1200g of 1,3-pentadiene, 40g of sodium dodecylbenzenesulfonate, 200g of alkylphenol polyoxyethylene ether, 1920g of deionized water, 9.6g of sodium carbonate and 9.8g of sodium persulfate for 30 minutes into a pre-emulsion.
[0081] In the second step, the functional emulsion is prepared with the modified nano-silica as the core. Get 54g of surface-functionalized modified nano-silica and add it to a reactor equipped with 54g fatty acid soap and 456g deionized water, stir and heat up to 68°C, then get 676g monomer pre-emulsion and add it to the react...
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