A lactic acid-based aliphatic-aromatic random copolymer

A technology of random copolymer and lactic acid base grease, which is applied in the field of polymers, can solve the problems of reducing the brittleness of polylactic acid, reducing the complex viscosity, and reducing the melt strength, etc., to achieve improved compatibility, good elongation at break, high The effect of melt strength

Active Publication Date: 2017-11-28
吉林锦玉自动化设备科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In patent CN100532420C, hyperbranched polymer is used to modify polylactic acid, which improves the mechanical properties and elongation at break of polylactic acid, reduces the brittleness of polylactic acid, but the complex viscosity is greatly reduced, which also shows that the melt strength is reduced

Method used

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  • A lactic acid-based aliphatic-aromatic random copolymer
  • A lactic acid-based aliphatic-aromatic random copolymer
  • A lactic acid-based aliphatic-aromatic random copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0118] 1.1 Add 1,800g of lactic acid and 1,000g of succinic anhydride to the flask in turn, raise the temperature to 140°C, and stir the reactants. After 10 hours, raise the temperature to 180°C, and remove the unreacted monomer by vacuuming. The pressure is 200Pa, 3h Discharge, obtain double-terminal carboxyl lactic acid;

[0119] 1.2 Add 330g of terephthalic acid, 300g of adipic acid, 520g of butanediol, 10g of glycerin, 1g of tetrabutyl titanate and 200g of double-terminal carboxyl lactic acid obtained in Example 1.1 into the reaction kettle in sequence, and raise the temperature to 180°C And stir the reactant, collect the water generated by the reaction at the same time, when the reaction no longer distills out the liquid, raise the temperature to 250°C, vacuumize the polycondensation reaction, the pressure is 200Pa, and discharge the material for 5h to obtain polyhexamethylene terephthalate Butylene glycol lactic acid succinate random copolymer.

[0120] The present inve...

Embodiment 2

[0124] Add 380g of dimethyl terephthalate, 300g of adipic acid, 520g of butanediol, 1g of glycerin, 1g of tetrabutyl titanate and 100g of double-terminal carboxyl lactic acid obtained in Example 1.1 into the reaction kettle in sequence, and then heat up Stir the reactant to 150°C, and collect the water generated by the reaction at the same time. When the reaction no longer distills out liquid, raise the temperature to 270°C, vacuumize the polycondensation reaction, and the pressure is 500Pa, and the material is discharged for 4 hours to obtain polyterephthalene Butylene glycol formate adipate lactic acid succinate random copolymer.

[0125] The present invention carries out gel permeation chromatographic analysis on the obtained copolymer, and the relative number average molecular weight of the obtained polybutylene lactic adipate terephthalate random copolymer is 25.0 kg / mol.

[0126] The present invention tests the performance of the product according to the above-mentioned ...

Embodiment 3

[0128] After adding 300g of phthalic anhydride, 300g of adipic acid, 420g of butanediol, 1g of glycerol, 1g of tetrabutyl titanate and 100g of double-terminal carboxyl lactic acid obtained in Example 1.1 into the reactor, the temperature was raised to 150 ℃ and stir the reactant, and collect the water generated by the reaction at the same time. When no liquid distills out of the reaction, the temperature is raised to 250 ℃, and the vacuum polycondensation reaction is carried out. Butylene glycol lactic acid succinate random copolymer.

[0129] The present invention carries out gel permeation chromatographic analysis on the obtained copolymer, and the relative number average molecular weight of the obtained polybutylene phthalate adipate succinate random copolymer is 22.0 kg / mol.

[0130] The present invention tests the performance of the product according to the above-mentioned technical scheme, and the test results show that: the polybutylene terephthalate adipate succinate r...

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Abstract

The invention provides a lactic acid-based aliphatic-aromatic random copolymer prepared by the following preparation method: a) reacting lactic acid and dianhydride to obtain double-terminal carboxyl lactic acid; b) preparing aromatic dicarboxylic acids The compound, the aliphatic dicarboxylic acid compound, the diol compound and the double-terminal carboxyl lactic acid obtained in step a) and the polyvalent compound are subjected to an esterification reaction and a polycondensation reaction to obtain a lactic acid-based aliphatic-aromatic random copolymer; The polyvalent compound is a polyacid compound or a polyalcohol compound. The aliphatic group and aromatic group in the lactic acid-based aliphatic-aromatic random copolymer are randomly distributed, and have a long-chain branched structure, so that the copolymer has relatively high melt strength. In addition, the copolymer has aliphatic-aromatic polyester, which makes it more flexible; and improves its compatibility with polylactic acid or polyester, expanding its application field; the copolymer can be completely biodegradable, Will not cause environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of polymers, in particular to a lactic acid-based aliphatic-aromatic random copolymer. Background technique [0002] The development of the plastics industry has brought cheap and high-quality packaging to commodities, but a large number of plastic products produced by non-renewable petroleum resources have also brought serious resource shortages and environmental pollution to human beings. The best way to solve this problem is to research and develop new degradable materials. Among the degradable materials that have been developed and utilized by people, polylactic acid (PLA) has excellent biocompatibility and biodegradability, and the final degradation products are carbon dioxide and water, which will not pollute the environment. higher. However, PLA contains a large number of ester bonds, and its hydrophilicity is poor, which reduces the biocompatibility between polylactic acid and other substances; var...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/60C08G63/78
Inventor 张宝陈学思边新超李杲
Owner 吉林锦玉自动化设备科技有限公司
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