2,5-furandicarboxylic-acid-based polyester foam material and preparation method thereof

A technology of furandicarboxylic acid and foaming materials, applied in the field of polymer foaming materials, can solve the problems of slow dissolution rate, low solubility, poor foaming performance, etc., and achieve improved toughness, appropriate expansion ratio, and uniform cell size Effect

Active Publication Date: 2018-08-17
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, there is no report about the foaming of 2,5-furandicarboxylic acid-based polyester
2,5-furandicarboxylic acid-based polyester has good gas barrier properties, so that the dissolution rate of gas blowing agent in this type of copolyester is slow and the solubility is low, resulting in poor foaming performance. Extremely unfavorable
By increasing the temperature in the kettle, although the dissolution rate of the blowing agent in the polyester is increased, the solubility of the blowing agent in the polyester becomes lower, so this method cannot be used to prepare 2,5-furan di Formic acid based polyester foam

Method used

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  • 2,5-furandicarboxylic-acid-based polyester foam material and preparation method thereof
  • 2,5-furandicarboxylic-acid-based polyester foam material and preparation method thereof
  • 2,5-furandicarboxylic-acid-based polyester foam material and preparation method thereof

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preparation example Construction

[0022] The preparation method of 2,5-furandicarboxylic acid base polyester foam material provided by the invention comprises the following steps:

[0023] (a) placing 2,5-furandicarboxylic acid-based polyester plastic in a mold, and pressing it into a sheet-shaped preform, and then quenching the sheet-shaped preform;

[0024] (b) placing the quenched preform and the first foaming agent in a closed container; wherein, the first foaming agent is not in contact with the preform, and the first foaming agent is At least one of chloroform, acetone, ether, pentane, and hexafluoroisopropanol;

[0025] (c) feed a second blowing agent into the airtight container again, the second blowing agent is at least one of carbon dioxide and nitrogen, and keep the temperature in the airtight container at 40°C to 65°C , so that the first foaming agent changes from a liquid state to a gaseous state, while maintaining the pressure in the airtight container at 1 MPa to 6 MPa, and the pressure holding...

Embodiment 1

[0042] The PEF plastic granules are placed in a vacuum oven, and dried at 70°C for 10 hours to remove the moisture in the PEF plastic granules, so that the water content of the PEF plastic granules is ≤0.05wt.%.

[0043] Then put the PEF plastic particles in a mould, and press it into a thin plate-shaped preform with a thickness of 1mm on a molding machine at 220 ° C. The thin plate-shaped preform is in a molten state, and then the preform in a molten state in the mold Together with the mold, place it in liquid nitrogen for quenching treatment for 5 minutes to obtain a quenched preform.

[0044] Place the quenched preform and the beaker containing ether together in the autoclave without contact, and use 1 mL of ether for every 50 g of the preform. Set the temperature in the autoclave to 45°C to vaporize the ether, and at the same time fill the autoclave with carbon dioxide gas to keep the pressure in the autoclave at 4 MPa for 5 hours.

[0045] Quickly remove the gas in the a...

Embodiment 2

[0048] The PEF plastic granules are placed in a vacuum oven, and dried at 70°C for 10 hours to remove the moisture in the PEF plastic granules, so that the water content of the PEF plastic granules is ≤0.05wt.%.

[0049] Then put the PEF plastic particles in a mould, and press it into a thin plate-shaped preform with a thickness of 1mm on a molding machine at 220 ° C. The thin plate-shaped preform is in a molten state, and then the preform in a molten state in the mold Together with the mold, place it in liquid nitrogen for quenching treatment for 6 minutes to obtain a quenched preform.

[0050] Place the quenched preform and the beaker containing ether together in the autoclave without contact, and use 1 mL of ether for every 50 g of the preform. Set the temperature inside the autoclave to 45°C to vaporize ether, and at the same time fill the autoclave with carbon dioxide gas to keep the pressure inside the autoclave at 5 MPa for 5 hours.

[0051] Quickly remove the gas in t...

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Abstract

The invention relates to a 2,5-furandicarboxylic-acid-based polyester foam material and a preparation method thereof. The preparation method comprises the following steps: (a) placing 2,5-furandicarboxylic-acid-based polyester plastic in a mold, pressing the same into a laminated preform, and quenching the laminated preform; (b) placing the quenched preform and a first foaming agent in a closed container without contact, wherein the first foaming agent is at least one of chloroform, acetone, diethyl ether, pentane and hexafluoroisopropanol; (c) introducing a second foaming agent into the closed container, wherein the second foaming agent is at least one of carbon dioxide and nitrogen, and the temperature in the closed container is maintained at 40 DEG C to 65 DEG C, so that the first foaming agent is changed into a gas state from a liquid state, the pressure in the closed container is 1 MPa to 6 MPa, and the pressure maintaining time is 4 h to 15 h; (d) removing the gas in the closed container, taking the preform out and placing in a foaming medium to be foamed, and cooling to obtain the 2,5-furandicarboxylic-acid-based polyester foam material with the cell size of 5 microns to 50microns and the expansion multiple of 2 to 15 times.

Description

technical field [0001] The invention relates to the technical field of polymer foaming materials, in particular to 2,5-furandicarboxylate polyester foaming materials and a preparation method thereof. Background technique [0002] Polymer foam material refers to a microporous material with a large number of air bubbles in the polymer matrix. It has the advantages of light weight, good impact resistance, high specific strength, heat insulation, sound absorption, and drug release. At present, polymer foaming materials have been widely used in packaging, household appliances, auto parts, sports, construction, separation membranes, oil-absorbing materials, medicine and other fields. In recent years, 2,5-furandicarboxylates have been extensively studied. The reason is due to the following two points: [0003] 1. 2,5-furandicarboxylic acid-based polyester is the same as the widely used bio-based polymers (such as polylactic acid (PLA), polybutylene succinate (PBS), polyhydroxy fa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12C08J9/14C08L67/02
CPCC08J9/122C08J9/141C08J9/142C08J9/143C08J9/145C08J2203/06C08J2203/12C08J2203/14C08J2203/142C08J2203/146C08J2203/182C08J2367/02
Inventor 庞永艳郑文革刘伟吴明辉覃康培
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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