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A kind of organic nucleating agent for polylactic acid and preparation method thereof

A technology of organic nucleating agent and polylactic acid, which is applied in the field of organic nucleating agent of polylactic acid and its preparation, can solve the problems of poor compatibility between inorganic compounds and polylactic acid, loss of mechanical properties of materials, and unclear nucleation mechanism, etc. Achieve the effect of maintaining stable mechanical properties, cheap price, and simple production process

Active Publication Date: 2020-12-01
YONGKANG NANYI BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the fact that the existing inorganic nucleating agents are difficult to meet the requirements of industrialized production, which will easily lead to the loss of the mechanical properties of the material and the loss of its application value, and the compatibility between inorganic compounds and polylactic acid is poor, so it basically needs to be used before use. The functional reprocessing of inorganic nucleating agents increases the production cost. The current inorganic nucleating agents have defects such as poor structural designability and unclear nucleation mechanism. A new organic nucleating agent for polylactic acid is provided. The preparation method of the agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method for an organic nucleating agent for polylactic acid, comprising the following steps:

[0032] (1) At room temperature, take polyethylene glycol, unsaturated fatty acid, and caprolactone monomer and prepare a mixture according to the molar ratio of 1:1:1~1:2:6;

[0033] (2) Put the mixture prepared in step (1) into a reactor equipped with an electric stirrer, an electric heater, a reflux condenser, and a temperature measuring system, and gradually increase the reaction temperature in the reactor until the mixture in the reactor is completely melted ;

[0034] (3) Continue to increase the temperature in the reactor. When the temperature in the reactor rises to 120°C, add a catalyst with a mass fraction of 0.3% to 3% of the mixture into the reactor;

[0035] (4) Continue to increase the temperature in the reactor. When the temperature in the reactor rises to 160°C-170°C, keep the reaction temperature in the reactor and continue to react for 6h-8h;

[0...

Embodiment 2

[0045] A preparation method for an organic nucleating agent for polylactic acid, comprising the following steps:

[0046] (1) At room temperature, take polyethylene glycol, unsaturated fatty acid, and caprolactone monomer and prepare a mixture according to the molar ratio of 1:2:6;

[0047] (2) Put the mixture prepared in step (1) into a reactor equipped with an electric stirrer, an electric heater, a reflux condenser, and a temperature measuring system, and gradually increase the reaction temperature in the reactor until the mixture in the reactor is completely melted ;

[0048] (3) Continue to increase the temperature in the reactor. When the temperature in the reactor rises to 120°C, add a catalyst whose mass fraction is 3% of the mixture to the reactor;

[0049] (4) Continue to increase the temperature in the reactor. When the temperature in the reactor rises to 170°C, keep the reaction temperature in the reactor and continue to react for 8 hours;

[0050] (5) Reduce the...

Embodiment 3

[0057] A preparation method for an organic nucleating agent for polylactic acid, comprising the following steps:

[0058] (1) At room temperature, take polyethylene glycol, unsaturated fatty acid, and caprolactone monomers and prepare them in a molar ratio of 1:1:1 to form a mixture;

[0059] (2) Put the mixture prepared in step (1) into a reactor equipped with an electric stirrer, an electric heater, a reflux condenser, and a temperature measuring system, and gradually increase the reaction temperature in the reactor until the mixture in the reactor is completely melted ;

[0060] (3) Continue to increase the temperature in the reactor. When the temperature in the reactor rises to 120°C, add a catalyst whose mass fraction is 0.3% of the mixture to the reactor;

[0061] (4) Continue to increase the temperature in the reactor. When the temperature in the reactor rises to 160°C, keep the reaction temperature in the reactor and continue to react for 6 hours;

[0062] (5) Reduce...

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Abstract

The invention discloses a preparation method of an organic nucleating agent for polylactic acid. The method comprises the following steps: taking and mixing polyethylene glycol, unsaturated fatty acidand caprolactone monomers at room temperature to prepare a mixture; adding the mixture into a reaction vessel, and gradually raising the reaction temperature in the reaction kettle until the mixturein the reaction vessel is completely melted; continuously raising the temperature in the reaction vessel to 120 DEG C, and adding a catalyst accounting for 0.3-3% of the mass of the mixture into the reaction vessel; continuously raising the temperature in the reaction vessel to 160-170 DEG C, maintaining the reaction temperature in the reaction, and continuously performing a reaction for 6-8 h; and reducing the temperature in the reaction kettle to 80 DEG C, shutting down the reaction kettle, and pouring out the obtained reaction product to obtain the organic nucleating agent for polylactic acid. The organic nucleating agent for polylactic acid can significantly shorten the injection molding cycle of a polylactic acid product and improve the heat resistance of the polylactic acid product after being added into polylactic acid, is friendly to the environment, and meets the needs for sustainable production in the modern society.

Description

technical field [0001] The invention relates to an organic nucleating agent, in particular to an organic nucleating agent for polylactic acid and a preparation method thereof. Background technique [0002] With the advent of the era of biodegradable plastics, polylactic acid has established its position as the first variety in the field of biodegradable plastics in terms of research and development, production, and application. Polylactic acid is prepared from renewable plant resources such as corn, wheat, and cassava through chemical synthesis of lactic acid. Due to its renewable raw materials, green production process and biodegradability, it is the most potential biodegradable polymer material, and the carbon dioxide and water produced by its final degradation can be returned to nature and added to the plant In the process of photosynthesis, the carbon cycle on the earth is maintained in balance to meet the requirements of sustainable social development; in addition, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/664C08L67/04
CPCC08G63/664C08L67/04C08L2205/025C08L2205/24
Inventor 应高波余金金
Owner YONGKANG NANYI BIOLOGICAL TECH
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