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A kind of polyester elastomer film and preparation method thereof

A polyester elastomer and film technology, applied in the field of polyester elastomer film and its preparation, can solve the problems of refractory polymer film, waste of crop straw and waste, etc., to expand utilization, improve mechanical properties, and expand application scope Effect

Active Publication Date: 2021-11-02
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the prior art that the polymer film is difficult to degrade and the waste of crop straws is wasted, the present invention provides a polyester elastomer film and a preparation method thereof. By using straw liquefied matter as a crosslinking agent, the polyester elastomer film can be improved. The mechanical properties, thermal properties and ultraviolet absorption properties of elastomer films, etc., and can be degraded, expanding the application range of biomass liquefaction

Method used

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  • A kind of polyester elastomer film and preparation method thereof
  • A kind of polyester elastomer film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Put 20 g of polyethylene glycol (molecular weight 400) and 5 g of glycerin into a three-necked flask and mix them, place them in an oil bath at 140 °C, add 1.75 g of concentrated sulfuric acid (98%) and 5 g of straw powder ( 50 mesh), stirred and reacted for 120 min. After the reaction, the reaction mixture was diluted with absolute ethanol, washed, filtered through a Buchner funnel to remove the residue, and the filtrate was removed by rotary evaporation (0.5 mbar, 65 ℃, 1 h). water ethanol to obtain straw liquefaction;

[0025] (2) Under a nitrogen atmosphere, take 1.5 g of straw liquefaction in a reaction flask, raise the temperature to 70 °C, add 7.5 mg of the catalyst stannous isooctanoate and 4 g of hexamethylene diisocyanate dropwise into the reaction flask, and stir magnetically After reacting for 3 h, a polyurethane prepolymer was generated, and 2.96 g of polycaprolactone diol was added, and the reaction was continued for 5 h to obtain a casting solution. ...

Embodiment 2

[0027] (1) Put 20 g of polyethylene glycol (molecular weight 400) and 5 g of glycerin into a three-necked flask and mix them, place them in an oil bath at 140 °C, add 1.75 g of concentrated sulfuric acid (98%) and 5 g of straw powder ( 50 mesh), stirred and reacted for 120 min. After the reaction, the reaction mixture was diluted with absolute ethanol, washed, filtered through a Buchner funnel to remove the residue, and the filtrate was removed by rotary evaporation (0.5 mbar, 65 ℃, 1 h). water ethanol to obtain straw liquefaction;

[0028] (2) Under a nitrogen atmosphere, take 2 g of straw liquefaction in a reaction flask, raise the temperature to 70 °C, add 10 mg of the catalyst stannous isooctanoate and 4 g of hexamethylene diisocyanate dropwise into the reaction flask, and magnetically stir After reacting for 3 h, a polyurethane prepolymer was generated, and 2.96 g of polycaprolactone diol was added, and the reaction was continued for 5 h to obtain a casting solution. Pla...

Embodiment 3

[0030] (1) Put 20 g of polyethylene glycol (molecular weight 400) and 5 g of glycerin into a three-necked flask and mix them, place them in an oil bath at 140 °C, add 1.75 g of concentrated sulfuric acid (98%) and 5 g of straw powder ( 50 mesh), stirred and reacted for 120 min. After the reaction, the reaction mixture was diluted with absolute ethanol, washed, filtered through a Buchner funnel to remove the residue, and the filtrate was removed by rotary evaporation (0.5 mbar, 65 ℃, 1 h). water ethanol to obtain straw liquefaction;

[0031] (2) Under a nitrogen atmosphere, take 2.5 g of liquefied straw in a reaction flask, raise the temperature to 70 °C, add 10 mg of the catalyst stannous isooctanoate and 4 g of hexamethylene diisocyanate dropwise into the reaction flask, and magnetically stir After reacting for 3 h, a polyurethane prepolymer was generated, and 2.96 g of polycaprolactone diol was added, and the reaction was continued for 5 h to obtain a casting solution. Plac...

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Abstract

The invention relates to a polyester elastomer film and a preparation method thereof. The straw powder, an acid catalyst and a polyol liquefaction agent are liquefied at 100-150°C for 90-130 minutes, and the reaction solution is diluted, washed and filtered, and the organic solvent is removed to obtain Straw liquefaction; under nitrogen atmosphere, mix 3~8 parts of straw liquefaction, catalyst and 8~12 parts of isocyanate at a temperature of 60~100°C for 2~5 h, add 4~6 polyester diol, continue After reacting for 3-6 hours, the casting solution was obtained, and the casting solution was spread and solidified to obtain a polyester elastomer film. The invention uses the liquefied straw as a crosslinking agent to improve the mechanical performance, thermal performance and ultraviolet absorption performance of the polyester elastomer film, which can be degraded and expands the application range of biomass liquefaction.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a polyester elastomer film and a preparation method thereof. Background technique [0002] Almost all polymers produced and used in the market are non-degradable petroleum-based polymer materials. In order to alleviate the depletion of petrochemical resources and the negative impact of petroleum-based polymers on the environment, it is urgent to develop renewable and degradable bio-based polymers. material. According to statistics, about 840 million tons of crop straw waste is produced every year across the country, and most of them are piled up in the fields to rot on their own, causing waste of resources and environmental pollution. The woody biomass is converted into low molecular weight polyols through liquefaction technology, combined with the multifunctional groups of the woody biomass itself and the liquefaction solvent, the liquid product rich in hydroxyl can...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/06C08L75/08C08L97/02C08J5/18C08G18/73C08G18/66C08G18/48C08G18/32C08G18/12C08G18/42
CPCC08G18/12C08G18/3206C08G18/4277C08G18/4833C08G18/6677C08G18/73C08J5/18C08J2375/06C08J2375/08C08J2497/02C08G18/42
Inventor 孟繁蓉张玉苍孔凡功
Owner QILU UNIV OF TECH
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