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Preparation method of star poly-(methyl)acrylate long-chain ester polymer

The technology of long-chain acrylic acid and methyl group is applied in the field of star-shaped polyacrylic acid long-chain ester polymer and its preparation. The effect of high molecular weight

Inactive Publication Date: 2011-05-25
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Domestic research in this area is still relatively small, and the polymerization methods and processes used are relatively complicated.

Method used

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  • Preparation method of star poly-(methyl)acrylate long-chain ester polymer
  • Preparation method of star poly-(methyl)acrylate long-chain ester polymer
  • Preparation method of star poly-(methyl)acrylate long-chain ester polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In a refluxed 100ml three-necked flask, nitrogen was introduced to replace oxygen, and 5.1g of lauryl methacrylate and 12.4ml of cyclohexanone were added. After bubbling with high-purity nitrogen for 30 minutes, 65.2 mg CuCl and 124.8 μL PMDETA were added. And continue to stir, after the ligand is fully complexed with cuprous chloride, add 3.26mgCuCl 2 . Continue to feed nitrogen into the system and start heating. When the temperature rises to the reaction temperature of 60° C., add 97.8 μL of initiator EBriB. After reacting for 1.5 hours, 1.2 mL of EGDMA was added, the temperature was raised to 90° C., the reaction was carried out in a nitrogen atmosphere for 9 hours, and the reaction was stopped by rapid cooling. After adding 120ml of tetrahydrofuran to dissolve the reaction product, pass through 110g of alumina to remove copper ions, add to a large amount of methanol precipitant to precipitate the product, repeat twice and vacuum dry to constant weight to obtain th...

Embodiment 2

[0042] In Example 1, the temperature was raised to 60° C., the initiator EBriB was added and reacted for 2 hours, and then EGDMA was added, and the rest were the same as Example 1.

Embodiment 3

[0044] In Example 1, after adding EGDMA and raising the temperature to 90° C., the reaction was carried out in a nitrogen atmosphere for 6 hours, and the rest were the same as Example 1.

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Abstract

The invention discloses a star poly-(methyl)acrylate long-chain ester polymer and a preparation method thereof. In the method, through atom transferring radical polymerization, the poly-(methyl)acrylate long-chain ester polymer with a star molecular structure is synthesized in one step by using a simple and economical method of arm first and core later; and arm length and arm number are controlled by adjusting a ratio of a monomer (methyl) acrylates long-chain ester to a catalyst to a ligand, and the adding time and dosage of a crosslinking agent methylacrylic acid gylcol ester (EGDMA) duringa polymerization reaction so as to obtain the star polymer with high yield, adjustable and controllable molecular weight, and narrow molecular weight distribution. The preparation method can synthesize the (methyl)acrylate long-chain ester star polymer of which the weight-average molecular weight reaches up to a million and the yield reaches over 85 percent, and has important significance for theory and practical application.

Description

technical field [0001] The invention relates to a star-shaped poly(meth)acrylic acid long-chain ester polymer and a preparation method thereof. technical background [0002] In recent years, various non-linear polymers (such as star polymers, star heteroarm copolymers, star block copolymers, tree or hyperbranched polymers, etc.) due to their special structures and properties, It has aroused people's strong interest in theoretical research and practical application. Among them, the star polymer has attracted extensive attention in the field of science and application because of its simple design, unique performance and potential application prospects, and has become a hot spot in material science research. Star-shaped polymer refers to a star-shaped polymer that contains more than three chains (arms) and each chain has no main and branched chains, and is connected to the same point (core) by chemical bonds. The size of the core is much smaller than that of the entire polymer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F293/00C08F120/10
Inventor 周晓东林群芳王予锋谢玄申涛应淑妮
Owner EAST CHINA UNIV OF SCI & TECH
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