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Lactic acid-amino acid copolyester amide and preparation method thereof

A polyester amide and amino acid technology, which is applied in the field of copolyester amide, can solve the problems of low material strength, poor thermal stability, and limitations, and achieve the effects of excellent physical properties, improved performance, and convenient operation

Active Publication Date: 2013-06-26
盐城创咏新能源投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some inherent disadvantages of pure PLA (such as low material strength and poor thermal stability) limit its wider application.

Method used

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  • Lactic acid-amino acid copolyester amide and preparation method thereof
  • Lactic acid-amino acid copolyester amide and preparation method thereof
  • Lactic acid-amino acid copolyester amide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of Lactic Acid-5wt% Amino Undecanoic Acid Copolyester Amide by In Situ Melt Polycondensation

[0025] First mix the weighed L-lactic acid and aminoundecanoic acid (5wt%), heat and stir at 100°C for 2 hours; then add the mixture into the reaction bottle, and the amount of addition should not exceed 2 / 3 of the volume. Replace the air in the bottle with nitrogen for 4-5 times, connect the vacuum device, heat to 130°C, depressurize to 100 Torr (Torr), stir at 400r / min, react for 3h; then raise the temperature to 150°C, depressurize to 10 Torr (Torr), reacted for 4h, obtained viscous lactic acid-aminoundecanoic acid oligomer; in the oligomer obtained before, add 0.4wt% composite binary catalyst tin protochloride (SnCl 2 ) and p-toluenesulfonic acid (TSA), SnCl 2 The molar ratio with TSA is 1:1, then gradually heated to 190°C, the pressure dropped to 10 Torr (Torr) in 1.5h, and reacted under this condition for 10h.

[0026] The reaction formula is as follows:

...

Embodiment 2

[0036] Preparation of Lactic Acid-20wt% Amino Undecanoic Acid Copolyester Amide by In Situ Melt Polycondensation

[0037] First mix the weighed L-lactic acid and aminoundecanoic acid (20wt%), heat and stir at 110°C for 2 hours; then add the mixture into the reaction bottle, and the amount of addition should not exceed 2 / 3 of the volume. Replace the air in the bottle with nitrogen for 4-5 times, connect the vacuum device, heat to 140°C, decompress to 100 Torr (Torr), stir at 400r / min, and react for 3h; then the temperature rises to 170°C, and the pressure is reduced to 10 Torr (Torr), reacted for 4h to obtain a viscous lactic acid-aminoundecanoic acid oligomer; in the oligomer obtained before, add 0.6wt% composite binary catalyst stannous chloride (SnCl2) and p-toluene Sulfonic acid (TSA), SnCl 2 The molar ratio with TSA is 1:1, then gradually heated to 200°C, the pressure dropped to 10 Torr (Torr) in 1.5h, and reacted for 10h under this condition.

[0038] The Mw of the lact...

Embodiment 3

[0040] Preparation of lactic acid-20wt% aminopropionic acid copolyesteramide by in-situ melt polycondensation

[0041]First mix the weighed L-lactic acid and aminopropionic acid (20wt%), heat and stir at 110°C for 2 hours; then add the mixture into the reaction bottle, and the amount of addition should not exceed 2 / 3 of the volume. Replace the air in the bottle with nitrogen for 4-5 times, connect the vacuum device, heat to 130°C, depressurize to 100 Torr (Torr), stir at 400r / min, react for 3h; then raise the temperature to 150°C, depressurize to 10 Torr (Torr), reacted for 4h to obtain a viscous lactic acid-alanine oligomer; in the oligomer obtained before, add 0.6wt% composite binary catalyst tin protochloride (SnCl2) and p-toluenesulfonate acid (TSA), SnCl 2 The molar ratio with TSA is 1:1, then gradually heated to 200°C, the pressure dropped to 10 Torr (Torr) in 1.5h, and reacted for 10h under this condition.

[0042] The reaction formula is as follows:

[0043]

[0...

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Abstract

The invention relates to lactic acid-amino acid copolyester amide and a preparation method thereof and relates to the technical field of the copolyester amide. The lactic acid-amino acid copolyester amide can be used for improving thermal stability and mechanical strength of a polylactic acid material, and also can be used as a compatibilizer in the blending of polylactic acid and nylon. The lactic acid-amino acid copolyester amide is prepared by copolymerization of any amino acid and lactic acid, wherein the monomer of any amino acid can be 11-amino undecanoic acid, 12-amino dodecanoic acid and 6-aminocaproic acid or caprolactam, glycine, aminopropionic acid, aminobutyric acid, 8-aminocaprylic acid or octane lactam, 9-aminononanoic acid or nonane lactam, 10-amino decenouc acid or decane lactam, dodecane lactam, 14-amino tetradecanoic acid. According to the lactic acid-amino acid copolyester amide and the preparation method thereof disclosed by the invention, the polylactic acid products are various, the thermal performances and the mechanical performances of the polylactic acid products are improved and the application range of the material is more extensive.

Description

technical field [0001] The invention relates to the technical field of copolyesteramide, in particular to a novel lactic acid-amino acid copolyesteramide and a preparation method thereof. Background technique [0002] Polylactic acid has the advantages of wide sources, good biocompatibility, and biodegradability. It has been widely used in medical fields such as surgical sutures, drug controlled release carriers, and tissue engineering materials. Polymer Materials. However, some inherent disadvantages of pure PLA (such as low material strength and poor thermal stability) limit its wider application. The Department of Polymer Science and Advanced Materials Laboratory of Fudan University successfully prepared a polyester amide copolymer based on lactic acid and alanine. The obtained product has a relatively maximum molecular weight, and the copolymer exhibits good degradation performance. Chinese patent CN1775827A discloses a method for preparing L-lactic acid and amino acid...

Claims

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Application Information

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IPC IPC(8): C08G69/44C08L67/04C08L77/00C08L77/12
Inventor 王标兵袁丁
Owner 盐城创咏新能源投资有限公司
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