Sulfur-containing high-trans elastomers with adjustable content of trans-1,4-structure and preparation method of elastomers

A high-trans, elastomer technology, applied to a class of sulfur-containing high-trans elastomers with adjustable trans-1,4-structure content and its preparation field, which can solve the problem of limited applications and low glass transition temperature Tg , It is difficult to form alternate chain links, etc., to achieve the effect of good dynamics and mild reaction conditions

Active Publication Date: 2019-06-07
辽宁科之镁新材料研究有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] On the other hand, the copolymerization of conventional types of DPE and conjugated dienes usually shows a high reactivity ratio, that is, conjugated dienes tend to be homopolymerized, and it is difficult to achieve efficient and quantitative introduction of functionalization in conjugated diene polymer chains. Alternate chain link formation in DPE unit
Moreover, the glass transition temperature Tg of polyconjugated diene flexible chains is low, which greatly limits its application in high temperature scenarios.

Method used

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  • Sulfur-containing high-trans elastomers with adjustable content of trans-1,4-structure and preparation method of elastomers
  • Sulfur-containing high-trans elastomers with adjustable content of trans-1,4-structure and preparation method of elastomers
  • Sulfur-containing high-trans elastomers with adjustable content of trans-1,4-structure and preparation method of elastomers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1 (No. 1)

[0036] Under the protection of argon, add 260mL of solvent toluene and 1.82g of MTAE to the 1L polymerization reactor that has been dried and deoxygenated, raise the temperature to 70°C, turn on the stirring, add the initiator n-butyl lithium according to the design molecular weight of 50kg / mol, and react for 30min Add THF 0g (THF / Li=0), butadiene (1.85M toluene solution) 500mL, styrene 8.82g successively, continue the reaction for 7h, add isopropanol to terminate, and the reaction mixture is precipitated in excess anhydrous methanol , and the resulting polymer was dried in a vacuum oven to constant weight. The product structure analysis results are as follows: in terms of mass percentage, the styrene content in the terpolymer is 14.5%, the MTAE content is 3.1%, and the rest is butadiene; the number average molecular weight is 55kg / mol, and the molecular weight distribution is 1.05; Based on 100% of the total mass of dienes, the content of 1,2-po...

Embodiment 2

[0037] Embodiment 2 (No. 1)

[0038] Under the protection of argon, add 260mL of solvent toluene and 3.75g of MTAE to the 1L polymerization reactor that has been dried and deoxygenated, raise the temperature to 30°C, turn on the stirring, add the initiator n-butyllithium according to the designed molecular weight of 300kg / mol, and react for 20min Then add tetrahydrofuran THF 4.33g (THF / Li=50 equivalent), butadiene (1.85M toluene solution) 500mL, styrene 8.82g, continue reaction 10h, add isopropanol to terminate, reaction mixture is in excess anhydrous methanol The resulting polymer was dried in a vacuum oven to constant weight. The product structure analysis results are as follows: in terms of mass percentage, the styrene content in the terpolymer is 14.1%, the MTAE content is 6.2%, and the rest is butadiene; the number average molecular weight is 283kg / mol, and the molecular weight distribution is 1.04; Based on 100% of the total mass of dienes, the content of 1,2-polybutadi...

Embodiment 3

[0039] Embodiment 3 (No. 1)

[0040] Under the protection of argon, add 260mL of solvent xylene and 6.53g of MTAE to the 1L polymerization reactor that has been dried and deoxygenated, raise the temperature to 80°C, turn on the stirring, add the initiator n-butyllithium according to the design molecular weight of 500kg / mol, and react 10min; then add tetrahydrofuran THF 4.33g (THF / Li = 100 equivalents), butadiene (1.85M toluene solution) 500mL, styrene 8.82g, continue the reaction for 3h, add isopropanol to terminate, the reaction mixture in excess anhydrous The resulting polymer was precipitated in methanol and dried in a vacuum oven to constant weight. The product structure analysis results are as follows: in terms of mass percentage, the styrene content in the terpolymer is 13.6%, the MTAE content is 9.8%, and the rest is butadiene; the number average molecular weight is 487kg / mol, and the molecular weight distribution is 1.04; Based on 100% of the total mass of diene, the ...

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Abstract

The invention provides sulfur-containing high-trans elastomers with an adjustable content of a trans-1,4-structure and a preparation method of the elastomers, and belongs to the technical field of functional polymer materials. The elastomers comprise a series of sulfur-containing functionalized high-trans solution-polymerized styrene-butadiene, styrene-isoprene and styrene-isoprene-butadiene rubber with an adjustable content of the trans-1,4-structure. The method provided by the invention is based on an anionic system and has mild reaction conditions, the elastomers can be conveniently synthesized in a hydrocarbon solvent, a partially-alternated multi-block copolymer can be synthesized by adjusting a dosing amount of MTAE and the usage amounts of comonomer styrene, butadiene and isoprene without adding a metal regulating agent, and therefore regulation and control of a content of a diene trans-1,4-structure and the glass transition temperature Tg of the copolymer can be realized; and the high-trans-structural diene polymer has very dynamic properties, such as low rolling resistance and compression heat generation and excellent flexing resistance, and is an ideal rubber compound fordeveloping high-performance tires.

Description

technical field [0001] The invention belongs to the technical field of functional polymer materials, and relates to a class of sulfur-containing high-trans elastomers with adjustable trans-1,4-structure content and a preparation method thereof, in particular to a class of 9-methylene-9H- Sulfur-functionalized solution polystyrene butadiene (SBR), pentylbenzene (SIR) and integrated rubber (SIBR) elastomers with adjustable trans-1,4-structure content of thiodiphenylethylene (MTAE), and give Its specific synthetic method is shown. Background technique [0002] Due to its long service life, low rolling resistance, fuel saving, large load-carrying capacity, good adhesion, low tire temperature, fast heat dissipation, hard puncture, and hard tire blowout, radial tires have become the mainstream tire products in the world. For the use of radial tires, the main concerns are as follows: (1) Good traction, that is, the grip of the tire. It is related to the grip on dry, wet, ice and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F236/10C08F236/06C08F236/08C08F228/06
Inventor 马红卫韩丽常爽李克秋王军晓
Owner 辽宁科之镁新材料研究有限公司
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