Block copolymer and block copolymer composition and its preparation method and vulcanized rubber and application and tire tread and tire
A technology of block copolymer and composition, applied in the field of tires and tire treads, can solve the problems of rubber with poor wet skid resistance, large rolling resistance, and poor wet skid resistance.
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Embodiment 1
[0130] (1) Under the protection of high-purity nitrogen, add 2200g cyclohexane and 121g butadiene to a 5L batch polymerization reactor equipped with an anchor stirrer in sequence, start stirring, heat the circulating water bath to 55°C, and add 2.4mL of n-butyllithium solution (1.0M hexane solution, the same below) initiates the polymerization reaction, and reacts at 70°C for 30min (monomer conversion rate is more than 99% by weight), and the first polymerization mixture containing butadiene block is obtained. liquid.
[0131] (2) Add 4.8mL divinylbenzene hexane solution (mass concentration is 80.32%, wherein, the mass concentration of p-DVB is 26.2%, the mass concentration of m-DVB is 54.12% in the reactor, purchased from Bailingwei Reagent Co., Ltd., dilute the commercially available solution to 0.4M for use, the same below), and react at 60°C for 30 minutes to obtain the second polymerization mixture.
[0132] (3) Add 2.4mL tetrahydrofuran (THF) and 1.4mL potassium tert-am...
Embodiment 2
[0136] (1) Under the protection of high-purity nitrogen, add 2200g cyclohexane and 147g butadiene to a 5L batch polymerization reactor equipped with an anchor stirrer in sequence, start stirring, heat the circulating water bath to 60°C, and add 2.7 mL of n-butyllithium solution initiated the polymerization reaction, reacted at 70° C. for 30 min (the conversion rate of the monomer was above 99% by weight), and obtained the first polymerization mixed liquid containing butadiene block.
[0137] (2) Add 5.4 mL of a hexane solution of divinylbenzene into the reactor, and react at 60° C. for 30 min to obtain a second polymerization mixture.
[0138] (3) Add 2.9mL THF and 1.8mL t-AmOK hexane solution in the reactor, then add 227g butadiene, isoprene and styrene mixed monomer (wherein, butadiene 70g, isoprene 100g, styrene 57g, use butyl lithium solution to break impurities outside the kettle); polymerize at 80°C for 90min (monomer conversion rate is more than 99% by weight) to obtain...
Embodiment 3
[0142] (1) Add 2200g of cyclohexane, 0.2mL of tetrahydrofuran and 147g of butadiene to a 5L batch polymerization reactor equipped with an anchor stirrer under the protection of high-purity nitrogen, start stirring, and heat to 60°C in a circulating water bath. Add 2.3mL of n-butyllithium solution into the reactor to initiate the polymerization reaction, and react at 70° C. for 30 minutes (monomer conversion rate is above 99% by weight), to obtain the first polymerization mixed solution containing butadiene block.
[0143] (2) Add 4.6 mL of a hexane solution of divinylbenzene into the reactor, and react at 70° C. for 30 min to obtain a second polymerization mixture.
[0144] (3) Add 2.3mL tetrahydrofuran and 1.9mL SDBS hexane solution (concentration is 0.3M, purchased from Bailingwei Reagent Company, the same below) into the reactor, then add 226g butadiene, isoprene and styrene mixed single (among them, 90g of butadiene, 80g of isoprene, and 56g of styrene were used to break i...
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