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DPE derivative, butadiene and styrene star-shaped block copolymer and preparation method thereof

A technology of block copolymers and derivatives, applied in the field of star block copolymers and preparation, can solve the problems of poor wear resistance and low strength, and achieve better effects

Inactive Publication Date: 2022-01-11
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of low strength and poor wear resistance of rubber in the prior art, the present invention provides a class of star-shaped block copolymers based on DPE derivatives, butadiene and styrene monomers and their preparation methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] [(SN-SBR)-BR]n-C star-shaped block copolymer: In a 5-liter stainless steel reactor with stirring, add 3.5 liters of benzene and 140 grams of butadiene, raise the temperature to 50 ° C, add multifunctional lithium to initiate When the polymerization reaction is carried out to 30 minutes, the butadiene polymerization reaction is completely completed; then add 157.5 grams of butadiene containing polar additive THF, 52.5 grams of styrene, 4.5 grams of 1,1-bis[4-(dimethyl Silyl) phenyl] ethylene (DPE-2SiH), THF / Li (molar ratio) is 35, continue to react for 60 minutes, when 1,1-bis [4- (dimethylsilyl) phenyl] ethylene, After the polymerization reactions of butadiene and styrene are all completed, a terminator is added to terminate the reaction. [(SN-SBR)-BR]n-C radial block copolymer: B1 is the first batch of butadiene (for the preparation of BR block); B2 is the second batch of butadiene [for the preparation of (SN-SBR ) block], styrene, 1,1-bis[4-(dimethylsilyl)phenyl]ethy...

Embodiment 2

[0045] [(SN-SBR)-BR]n-C star-shaped block copolymer: In a 5-liter stainless steel reactor with stirring, add 3.5 liters of benzene and 140 grams of butadiene, raise the temperature to 50 ° C, add multifunctional lithium to initiate When the polymerization reaction is carried out to 30 minutes, the butadiene polymerization reaction is completely completed; then add 157.5 grams of butadiene containing polar additive THF, 52.5 grams of styrene, 4.5 grams of 1,1-bis[4-(dimethyl Silyl) phenyl] ethylene (DPE-2SiH), THF / Li (molar ratio) is 35, continue to react for 60 minutes, when 1,1-bis [4- (dimethylsilyl) phenyl] ethylene, After the polymerization reactions of butadiene and styrene are all completed, a terminator is added to terminate the reaction. [(SN-SBR)-BR]n-C radial block copolymer: B1 is the first batch of butadiene (for the preparation of BR block); B2 is the second batch of butadiene [for the preparation of (SN-SBR ) block], styrene, 1,1-bis[4-(dimethylsilyl)phenyl]ethy...

Embodiment 3

[0047] [(SN-SBR)-BR]n-C star-shaped block copolymer: In a 5-liter stainless steel reactor with stirring, add 3.5 liters of benzene and 140 grams of butadiene, raise the temperature to 50 ° C, add multifunctional lithium to initiate When the polymerization reaction is carried out to 30 minutes, the butadiene polymerization reaction is all completed; add 157.5 grams of butadiene containing polar additive THF, 52.5 grams of styrene, 4.4 grams of 1 [4-(dimethylsilyl) Phenyl]-1-phenylethylene (DPE-SiH), THF / Li (molar ratio) is 35, continue to react for 60 minutes, when 1[4-(dimethylsilyl)phenyl]-1-phenyl After the polymerization reactions of ethylene, butadiene and styrene are all completed, a terminator is added to terminate the reaction. The ratio (weight ratio) of 1[4-(dimethylsilyl)phenyl]-1-phenylethylene, butadiene and styrene monomers in the (SN-SBR) block is as follows: (SN-SBR) The content of butadiene in the block is 70.1% (weight percent), the content of styrene is 24.2...

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Abstract

The invention belongs to the technical field of functional polymer materials. In order to improve the problems of insufficient performance, complex process and the like of rubber modification in the prior art, the invention provides the star-shaped block copolymer of the DPE derivative, butadiene and styrene and the preparation method thereof. The structure of the derivative is [(SN-SBR)-BR]n-C, wherein (SN-SBR) is a DPE derivative, butadiene and styrene copolymer block; the BR is a butadiene homopolymer block, C is a polyfunctionality alkyl lithium initiator residue, and n is greater than or equal to 3; the number-average molecular weight of the star-shaped block copolymer is 5 * 10<4> to 50 * 10<4>; wherein based on 100% of the mass of the (SN-SBR) block, the content of butadiene is 30-80%, the content of styrene is 5-50%, and the content of the DPE derivative is 0.5-20%; and the ratio (SN-SBR) / BR of the (SN-SBR) block to the BR block is 10 / 90 to 90 / 10.

Description

technical field [0001] The invention belongs to the technical field of polymer material synthesis and preparation, and particularly relates to a star-shaped block copolymer based on DPE derivatives, butadiene and styrene monomers and a preparation method. Background technique [0002] Due to the problems in the synthesis and refining of polylithium, it has not yet been industrialized. The multi-lithium initiation method uses organolithium containing multifunctional groups as an initiator, and directly initiates polymerization by anionic polymerization method to form a star-shaped block polymer in one step. The key problem of this method is the synthesis of multifunctional organolithium. Research Institute of Beijing Yanshan Petrochemical Company has applied for several patents on the development of multi-lithium system star-shaped block copolymers, using multi-functional organolithium initiators to initiate conjugated dienes such as styrene, isoprene and butadiene Copolymer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F297/04C08F4/48
CPCC08F297/048C08F297/042C08F4/488
Inventor 李杨冷雪菲王艳色韩丽
Owner DALIAN UNIV OF TECH
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