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Method for improving water resistance and flexibility of polyacrylic acid films by aid of poly trimethylene carbonate and polypropylene glycol

A technology of methyl carbonate and polyacrylic acid film, applied in the field of polymer film preparation, can solve the problems of polyacrylic acid film being hydrophilic, stiff, lacking in water resistance and flexibility, etc., and achieves easy control, improved water resistance and flexibility. , the effect of simple operation

Inactive Publication Date: 2017-07-25
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyacrylic acid is a biomaterial with good biocompatibility and biodegradability. Polyacrylic acid film can be used as artificial skin, etc., but polyacrylic acid film is too hydrophilic and stiff, and lacks good water resistance. and flexibility, which limits its application to a certain extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 1) Preparation of polyacrylic acid-polytrimethylene carbonate graft copolymer

[0015] Add 19 g polyacrylic acid (molecular weight 82000) and 9.8 g hydroxyl-terminated polytrimethylene carbonate monotridecyl ether (molecular weight 2300) into the dry reactor, add 284 ml dimethyl sulfoxide, and then add 0.062 grams N,N' -Dicyclohexylcarbodiimide, under an inert atmosphere, stirred and reacted at 28°C for 2 days, terminated the reaction, obtained the target product by filtration, dialysis, and drying;

[0016] 2) Preparation of polyacrylic acid film modified by polytrimethylene carbonate and polypropylene glycol

[0017] Add 10 grams of polyacrylic acid-polytrimethylene carbonate graft copolymer and 37 ml of dimethyl sulfoxide solvent in the drying reactor, and add polypropylene glycol monobutyl ether (molecular weight: 5400), under an inert atmosphere, stirred and mixed at 46°C for 50 minutes, formed a film by casting method, and dried in a vacuum oven at 50°C to obtai...

Embodiment 2

[0020] 1) Preparation of polyacrylic acid-polytrimethylene carbonate graft copolymer

[0021] Add 21 grams of polyacrylic acid (molecular weight: 85,000) and 10.9 grams of hydroxyl-terminated polytrimethylene carbonate monotridecyl ether (molecular weight: 2,400) into the dry reactor, add 315 ml of dimethyl sulfoxide, and then add 0.039 grams N,N' -Diisopropylcarbodiimide, stirred and reacted at 30°C for 3 days under an inert atmosphere, terminated the reaction, and obtained the target product by filtration, dialysis, and drying;

[0022] 2) Preparation of polyacrylic acid film modified by polytrimethylene carbonate and polypropylene glycol

[0023] Add 9.9 grams of polyacrylic acid-polytrimethylene carbonate graft copolymer and 36.5 ml of dimethyl sulfoxide solvent in the drying reactor, and add polypropylene glycol monobutyl ether (molecular weight: 5700), under an inert atmosphere, stirred and mixed at 48°C for 55 minutes, formed a film by casting method, and dried in a v...

Embodiment 3

[0026] 1) Preparation of polyacrylic acid-polytrimethylene carbonate graft copolymer

[0027] Add 21.3 g of polyacrylic acid (molecular weight: 89,000) and 11.1 g of hydroxyl-terminated polytrimethylene carbonate monotridecyl ether (molecular weight: 2,500) into the dry reactor, add 321 ml of dimethyl sulfoxide, and then add 0.058 g of 3-ethyl-1-(3-dimethylaminopropyl) carbodiimide was stirred and reacted at 33°C for 4 days under an inert atmosphere, the reaction was terminated, and the target product was obtained by filtration, dialysis and drying;

[0028] 2) Preparation of polyacrylic acid film modified by polytrimethylene carbonate and polypropylene glycol

[0029] Add 9.6 grams of polyacrylic acid-polytrimethylene carbonate graft copolymer and 35 ml of dimethyl sulfoxide solvent in the drying reactor, and add polypropylene glycol monobutyl ether (molecular weight: 6100), under an inert atmosphere, stirred and mixed at 52°C for 60 minutes, formed a film by casting method,...

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Abstract

The invention discloses a method for improving the water resistance and the flexibility of polyacrylic acid films by the aid of poly trimethylene carbonate and polypropylene glycol. The method includes steps of 1), synthesizing polyacrylic acid-poly trimethylene carbonate graft copolymers, to be more specific, adding hydroxyl-terminated poly trimethylene carbonate mono-tridecyl ether, solvents, condensing agents and polyacrylic acid into dry reactors, carrying out stirring reaction for 2-4 days and terminating the reaction to obtain the polyacrylic acid-poly trimethylene carbonate graft copolymers which are first aimed compounds; 2), preparing poly trimethylene carbonate and polypropylene glycol modified polyacrylic acid films, to be more specific, adding the polyacrylic acid-poly trimethylene carbonate graft copolymers, polypropylene glycol mono-butyl ether and solvents into the dry reactors, stirring and mixing the polyacrylic acid-poly trimethylene carbonate graft copolymers, the polypropylene glycol mono-butyl ether and the solvents with one another for 50-60 minutes, then forming films by the aid of tape casting processes and drying the films to obtain the poly trimethylene carbonate and polypropylene glycol modified polyacrylic acid films which are second aimed compounds. The method has the advantages that processes for preparing the poly trimethylene carbonate and polypropylene glycol modified polyacrylic acid films are simple and are easy to master, and the water resistance and the flexibility of the modified films obtained by the aid of the method can be greatly improved.

Description

technical field [0001] The invention relates to a method for improving the water resistance and flexibility of polyacrylic acid films, and belongs to the technical field of polymer film preparation. Background technique [0002] Polyacrylic acid is a biomaterial with good biocompatibility and biodegradability. Polyacrylic acid film can be used as artificial skin, etc., but polyacrylic acid film is too hydrophilic and stiff, and lacks good water resistance. and flexibility, which limits its application to a certain extent. Polytrimethylene carbonate and polypropylene glycol (more than 2000 molecular weight) are biomaterials with excellent biocompatibility and biodegradability, and are hydrophobic and flexible. First, the polytrimethylene carbonate segment is introduced into the polyacrylic acid segment to form a polyacrylic acid-polytrimethylene carbonate graft copolymer, and then the polypropylene glycol segment is added to the polyacrylic acid-polytrimethylene carbonate gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L87/00C08L71/02C08J5/18C08G81/02
CPCC08L87/005C08G81/027C08J5/18C08J2387/00C08J2471/02C08L2203/16C08L71/02
Inventor 申红望朱国全
Owner SHANDONG UNIV OF TECH