Functional emulsion styrene-butadiene rubber and preparation method thereof

An emulsion polystyrene-butadiene rubber and functionalization technology, which is applied in the field of functionalized emulsion polystyrene-butadiene rubber and its preparation, can solve the problem of limited number of polymer end groups, large application limitations of end-group functionalized polymers, and functional polymerization. Problems such as unsatisfactory physical structure and effect

Active Publication Date: 2013-02-27
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on the synthesis method of terminal-functionalized polymers has become mature, but due to the limited number of polymer terminal group

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 200 parts of water, 5 parts of fatty acid sodium, 18 parts of styrene, and 10 parts of p-N,N-dimethylaminostyrene into a 10L polymerization kettle, and pass in nitrogen to test the pressure. After confirming that there is no leakage in the polymerization kettle, use nitrogen Replaced several times, and then added 72 parts of butadiene. Start the polymerization tank to stir, and pass cold water into the polymerization tank to cool down. When the temperature of the polymerization tank drops to 50°C, add 0.3 parts of potassium persulfate initiator and 0.51 parts of tertiary dodecyl mercaptan, and react at 50°C for 12 hours. The monomer conversion rate was controlled at 70%, and 0.1 part of hydroquinone was added as a terminator. The rubber is condensed after being degassed, and the product of the present invention is obtained after hot air drying. The structure and properties of the sample were tested by classical methods, and the results are as follows: the content o...

Embodiment 2

[0019] The formulation and conditions of the polymerization system are the same as in Example 2, except that the ratio of styrene, p-N,N-dimethylaminostyrene, butadiene monomer and the amount of molecular weight regulator mercaptan are different. The monomer ratio of this embodiment is 20 parts of styrene, 5 parts of p-N,N-dimethylaminostyrene, 75 parts of butadiene, and 0.38 parts of molecular weight modifier tertiary dodecyl mercaptan. The structure and properties of the sample were tested by classical methods, and the results are as follows: the content of bound styrene in the copolymer is 36.5%, the content of bound p-N,N-dimethylaminostyrene is 8.7%, and the content of butadiene is 54.8%; The average molecular weight is 83,200, the weight average molecular weight is 302,000, and the molecular weight distribution index is 3.63.

Embodiment 3

[0021] The formulation and conditions of the polymerization system are the same as in Example 2, except that the ratio of styrene, p-N,N-dimethylaminostyrene, butadiene monomer and the amount of molecular weight regulator mercaptan are different. The monomer ratio of this embodiment is 5 parts of styrene, 23 parts of p-N,N-dimethylaminostyrene, 72 parts of butadiene, and 0.33 parts of molecular weight regulator tertiary dodecyl mercaptan. The structure and properties of the sample were tested by classical methods, and the results are as follows: the content of bound styrene in the copolymer is 9.3%, the content of bound p-N,N-dimethylaminostyrene is 31.4%, and the content of butadiene is 59.3%; The average molecular weight is 64,700, the weight average molecular weight is 328,600, and the molecular weight distribution index is 5.08.

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Abstract

The invention relates to a functional emulsion styrene-butadiene rubber, characterized in that: the number-average molecular weight is 3*10<4>-35*10<4>, based on 100% of total monomer, the sum of the weight percentages of bound styrene and styrene derivative is 10-50%, and the weight percentage of butadiene is 50-90%; based on 100% of the sum of the weight percentages of bound styrene and styrene derivative, the weight percentage of bound styrene is X%, and the weight percentage of styrene derivative is (100-X)%, wherein the X is no less than 0 and less than 100; the styrene derivative is selected from styrene containing nitrogen atom substituent, and at least contains one tertiary amine group substituent.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a class of functionalized emulsion polystyrene butadiene rubber and a preparation method thereof. Background technique [0002] The present invention relates to a kind of functionalized emulsion polystyrene butadiene rubber and its preparation method. This copolymer has the structural characteristics of random distribution of three monomers of styrene, styrene derivatives and butadiene, and adopts the method of emulsion polymerization Prepared. Compared with emulsion polystyrene butadiene rubber (E-SBR), the functionalized emulsion polystyrene butadiene rubber prepared by the present invention is a tread rubber with better comprehensive performance, which effectively improves the dry and wet road traction of high-performance tires Performance and heat resistance, reduce rolling resistance, improve wear resistance, wet skid resistance, cold flow resistance can achieve a g...

Claims

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Application Information

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IPC IPC(8): C08F236/10C08F236/06C08F212/08C08F212/14C08F2/30C08F2/26C08F2/42C08F4/40
Inventor 李杨申凯华王艳色王玉荣史正海王柏
Owner DALIAN UNIV OF TECH
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