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Appropriately crosslinked biodegradable polyester-amides random block copolymer and synthesizing method thereof

A technology of biodegradation and polyester amide, which is applied in the field of polyester amide polymer materials, can solve the problems of insufficient biodegradation performance of polyester amide, insufficient degradation performance, and toxicity of raw materials, etc., and achieve good biodegradation performance and degradation performance Good, simple method and effective effect

Active Publication Date: 2008-10-29
WUHAN HUALI ENVIRONMENT PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This reaction depends largely on the operating conditions, the reproducibility is relatively poor, and the polyester amide with such a block structure does not have sufficient biodegradability
[0004] To sum up, the existing biodegradable polyester amide synthesis methods have the following problems: raw materials are toxic, reaction speed is slow, side reactions are many, the reaction is difficult to operate, reproducibility is poor, degradation performance is insufficient, the product color is dark, and the cost is high and various other problems and deficiencies

Method used

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  • Appropriately crosslinked biodegradable polyester-amides random block copolymer and synthesizing method thereof
  • Appropriately crosslinked biodegradable polyester-amides random block copolymer and synthesizing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] At room temperature, add 174g dimethyl adipate, 194g dimethyl terephthalate, 120g 1,4-butanediol, 40.7g ethanolamine, 340mg tetrabutyl titanate, 5g antioxidant 1010 into the nitrogen inlet , a stirrer, and a four-necked flask with a condenser, feed nitrogen gas, raise the temperature to 140-160° C., and stir for 1-3 hours to react. Then slowly reduce the pressure, and gradually increase the temperature to 220-260°C, control the vacuum degree within 200Pa, and react for 3-6 hours. Then add 8.4 g of melamine into the reaction system, maintain the reaction temperature at 120-200° C., and react for another 0.5-2 hours. The obtained product is white, the molecular weight Mw measured by GPC method is 91,500, and the molecular weight distribution is 6.57.

Embodiment 2

[0034] At room temperature, add 146g of adipic acid, 166g of terephthalic acid, 153g of 1,4-butanediol, 18.3g of ethanolamine, 340mg of tetrabutyl titanate, and 5g of antioxidant 1010 into a tank equipped with a nitrogen inlet, a stirrer, and a condenser in sequence. In the four-necked flask, nitrogen gas was introduced, the temperature was raised to 140-160°C, and the reaction was stirred for 1-3 hours. Then slowly reduce the pressure, and gradually increase the temperature to 220-260°C, control the vacuum degree within 200Pa, and react for 3-6 hours. Then add 8.4 g of melamine into the reaction system, maintain the reaction temperature at 120-200° C., and react for another 0.5-2 hours. The obtained product is light yellow, the molecular weight Mw determined by GPC method is 80,300, and the molecular weight distribution is 5.16.

Embodiment 3

[0036] At room temperature, 146g dimethyl succinate, 194g dimethyl terephthalate, 90g 1,4-butanediol, 63.6g diethylene glycol, 23.2g hexamethylenediamine, 340mg tetrabutyl titanate, 5g anti Oxygen agent 1010 is sequentially added to a four-neck flask equipped with a nitrogen inlet, a stirrer, and a condenser, nitrogen is passed through, the temperature is raised to 140-160°C, and the reaction is stirred for 1-3 hours. Then slowly reduce the pressure, and gradually increase the temperature to 220-260°C, control the vacuum degree within 200Pa, and react for 3-6 hours. Then add 16.8 g of melamine into the reaction system, maintain the reaction temperature at 120-200° C., and react for another 0.5-2 hours. The obtained product is white, the molecular weight Mw determined by GPC method is 137,900, and the molecular weight distribution is 6.21.

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Abstract

The invention relates to a proper cross-linking biodegradable polyester amide atactic block copolymer and a synthetic method thereof. The structure of the atactic block copolymer is shown as the figure. The copolymer has the advantages of excellent mechanical and thermal properties and good biodegradability. Additionally, the atactic block copolymer is amphiphilic and compatible to other polymer materials. The atactic block copolymer is particularly suitable for being used as a biodegradable material, alone or together with thermoplastic starch.

Description

technical field [0001] The invention relates to a biodegradable polyester amide polymer material, in particular to a moderately cross-linked biodegradable polyester amide random block copolymer and a synthesis method thereof. Background technique [0002] Aliphatic or aliphatic-aromatic copolyester amide is a new type of biodegradable polymer material in the environment, which has the advantages of both polyester and polyamide, and the aliphatic polyester amide segment makes the material have good At the same time, the presence of polyamide segments makes the material have better strength and mechanical properties than pure polyester, and the presence of ester bonds and amide bonds at the same time endows polyester amide with amphiphilicity. Therefore, such polyester amides have broad application prospects. [0003] Among the existing patented techniques for synthesizing polyester amides, there are many synthetic techniques including random type and block type polyester ami...

Claims

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Application Information

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IPC IPC(8): C08G69/44C08G69/48
Inventor 胡汉杰白娟张立斌
Owner WUHAN HUALI ENVIRONMENT PROTECTION SCI & TECH
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