Preparation method of high trans-1,4-isoprene-butadiene copolymer

Abstract

The invention discloses a preparation method of a high trans-1,4-isoprene-butadiene copolymer. By adopting a solution slurry method, isoprene and butadiene are catalyzed to be polymerized by a supported titanium catalyst and further the high trans-1,4-isoprene-butadiene copolymer is synthesized. The copolymer consists of an isoprene unit with the mole fraction of 42.8 to 89.9 percent and a butadiene unit with the mole fraction of 10.1 to 57.2 percent; the mole contents of trans-1,4-configurations of the isoprene unit and the butadiene unit are both greater than 97 percent. Compared with high trans-1,4-polyisoprene and high trans-1,4-polybutadiene, the copolymer as a novel trans-1,4-polydiolefin has the advantage that processing and blending properties are remarkably improved; meanwhile, the copolymer has excellent dynamic properties such as small rolling resistance, good flexural fatigue resistance and low dynamic heat build-up and provides an ideal sizing material for high-performancegreen tires.

Description

technical field [0001] The invention belongs to the technical field of polymer synthesis, in particular to a method for preparing a high trans-1,4-isoprene-butadiene copolymer and a high trans-1,4-isoprene prepared by the method ene-butadiene copolymers. Background technique [0002] Due to its special structure and properties, high trans-1,4-diene polymer occupies a special position in the spectrum of rubber-plastic materials. Compared with cis-1,4-structured polymers, it has Relatively strong crystallization ability, it behaves as a hard material with high hardness at room temperature, so the processing and blending properties are poor. After long-term practice, relevant researchers have summed up the ideal model of low rolling resistance, high wear resistance, high fatigue resistance and environmental friendliness. Recently, high trans-1,4-diene polymers have attracted more and more attention from the industry because of their excellent dynamic properties, such as excel...

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Problems solved by technology

The catalyst efficiency and orientation of the solution polymerization are not high, the viscosity of the synthesized glue is very high, it is difficult to discharge the material from the reaction vessel, and the production process is complicated, requiring post-processing, resulting in high cost, which is not conducive to large-scale industrial production

The catalyst efficiency and orientation of bulk polymerization are relatively high, and the cost is relatively low, but there are also many unavoidable shortcomings, such as large stirring power and long polymerization time; it is not easy to dissipate heat, and it is easy to explode, which makes the quality of the product difficult to control ; Residual ash such as Ti, Al and other metal ions will cause aging

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