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Dilithium-initiated double-end functionalized triblock styrene-diene-styrene polymer and preparation method thereof

A styrene polymer, double-end functional technology, applied in the field of functional polymer materials, can solve the problem of less anion end groups, and achieve the effects of improving compatibility, increasing polarity, and high-efficiency reaction sites

Inactive Publication Date: 2019-12-20
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few studies on the functionalization of anionic end groups in my country, and only a small amount of research has been carried out by Dalian University of Technology and Yanshan Research Institute of Sinopec

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In the first step, under the protection of nitrogen or argon, 0.3g of 1,3-bis[1-(p-methylphenyl)vinyl]benzene, 20.0ml of cyclohexane, 7.6 ml 0.256M sec-butyllithium. After mixing evenly, stir at room temperature for 24 hours to obtain a dilithium initiator. In the second step, under the protection of nitrogen or argon, 50 ml of cyclohexane and 1.0 ml of the dilithium initiator solution in the reactor A were successively added to the polymerization reactor B at room temperature. After stirring and mixing evenly, 3.5 g of diene and 0.5 ml of 0.64M tert-butyloxylithium were added. After stirring, the temperature was raised to a polymerization temperature of 40° C., and a Li-PD-Li reaction solution was obtained after 24 hours of reaction. In the third step, under the protection of nitrogen or argon, 0.1 ml of anhydrous tetrahydrofuran and 1.5 g of styrene were successively added to polymerization reactor B at room temperature. After stirring, the temperature was raised t...

Embodiment 2

[0027] In the first step, under the protection of nitrogen or argon, 0.3g of 1,3-bis[1-(p-methylphenyl)vinyl]benzene, 20.0ml of cyclohexane, 7.6 ml 0.256M sec-butyllithium. After mixing evenly, stir at room temperature for 24 hours to obtain a dilithium initiator. In the second step, under the protection of nitrogen or argon, 50 ml of cyclohexane and 0.5 ml of the dilithium initiator solution in the reactor A were successively added to the polymerization reactor B at room temperature. After stirring and mixing evenly, 3.5 g of diene and 0.5 ml of 0.64M tert-butyloxylithium were added. After stirring, the temperature was raised to a polymerization temperature of 50° C., and a Li-PD-Li reaction solution was obtained after 24 hours of reaction. In the third step, under the protection of nitrogen or argon, 0.1 ml of anhydrous tetrahydrofuran and 1.5 g of styrene were successively added to polymerization reactor B at room temperature. After stirring, the temperature was raised t...

Embodiment 3

[0030] In the first step, under the protection of nitrogen or argon, 0.3g of 1,3-bis[1-(p-methylphenyl)vinyl]benzene, 10.0ml of cyclohexane, 7.6 ml 0.256M sec-butyllithium. After mixing evenly, stir at room temperature for 24 hours to obtain a dilithium initiator. In the second step, under the protection of nitrogen or argon, 50 ml of cyclohexane and 0.3 ml of the dilithium initiator solution in the reactor A were successively added to the polymerization reactor B at room temperature. After stirring and mixing evenly, 3.5 g of diene and 0.5 ml of 0.64M tert-butyloxylithium were added. After stirring, the temperature was raised to a polymerization temperature of 60° C., and a Li-PD-Li reaction solution was obtained after 24 hours of reaction. In the third step, under the protection of nitrogen or argon, 0.1 ml of anhydrous tetrahydrofuran and 1.5 g of styrene were successively added to polymerization reactor B at room temperature. After stirring, the temperature was raised t...

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Abstract

The invention relates to a dilithium-initiated double-end functionalized triblock styrene-diene-styrene polymer and a preparation method thereof. The polymer comprises the following components in percentages by mass calculated under the condition that the total amount of the triblock styrene-diene-styrene polymer is 100%: 20%-40% of styrene and the balance of diene; and the microstructure of polydiolefin comprises the following components in percentages by content calculated under the condition that the total mole amount of the diene is 100%: 7%-60% of a vinyl structure and the balance of a 1,4-structure. A bifunctional initiator method is adopted in the invention, and the production process of a traditional triblock styrene-diene-styrene polymer is simplified; an alkynyl functionalized 1,1-diphenylethylene derivative or an amino functionalized 1, 1-diphenylethylene derivative are simultaneously and efficiently introduced at two ends of a polymer chain; and by the introduced amine functional group, the defect of weak polarity of a traditional thermoplastic elastomer can be overcome, the compatibility between the amine functional group and the other components is improved, and thealkyne functional group provides an efficient reaction site for post-functionalization, so that preparation of a high-performance thermoplastic elastomer material can be finally realized.

Description

technical field [0001] The invention belongs to the technical field of functional polymer materials, and relates to a dilithium-initiated double-end functionalized triblock styrene-diene-styrene polymer and a preparation method thereof. Background technique [0002] Thermoplastic elastomers are a class of materials that have rubber elasticity at room temperature and melt plasticity at high temperatures. Because of its excellent tensile properties, good low temperature resistance, air permeability, solubility and unique skid resistance, it is widely used in shoemaking, plastic modification, asphalt modification and other fields. Among them, the styrene-butadiene-styrene (SBS) and styrene-isoprene-styrene (SIS) triblock polymers prepared by living anionic polymerization are currently the most produced thermoplastic elastomers in the world. . The number, size and composition of each polymer chain produced during polymerization is controlled by the sequence and amount of addit...

Claims

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Application Information

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IPC IPC(8): C08F297/04C08F8/32C08F8/00
CPCC08F8/00C08F8/32C08F297/04C08F297/046
Inventor 李杨杨琳燦马红卫韩丽冷雪菲王艳色
Owner DALIAN UNIV OF TECH
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