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A kind of method of polytrimethylene carbonate and polydioxanone improving water resistance of polyvinyl alcohol film

A technology of polydioxanone and methyl carbonate, applied in the field of polymer film preparation, to achieve the effects of improved water resistance, simple operation, and easy mastery

Inactive Publication Date: 2016-06-29
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on improving the water resistance of polyvinyl alcohol film with polytrimethylene carbonate and polydioxanone has not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) Synthesis of polytrimethylene carbonate containing terminal -NCO groups:

[0017] Add 12 grams of polytrimethylene carbonate monododecyl ether, 16.8 grams of 2,4-toluene diisocyanate and 280 ml of dimethyl sulfoxide solvent with a molecular weight of 2000 in the dry reactor, and add the total weight of the above reactants in addition 3‰ of dibutyltin dilaurate, under an inert atmosphere, stirred and reacted at 50°C for 40 minutes, terminated the reaction, and removed excess diisocyanate by dialysis to obtain the target product;

[0018] 2) Synthesis of polyvinyl alcohol-polytrimethylene carbonate graft copolymer:

[0019] Add 10 grams of polytrimethylene carbonate containing terminal -NCO groups, 8.5 grams of polyvinyl alcohol (molecular weight: 30,000) and 200 ml of dimethyl sulfoxide solvent into the dry reactor, add 3‰ of the total weight of the above reactants Dibutyltin dilaurate, under an inert atmosphere, stirred and reacted at 50°C for 40 minutes, then termi...

Embodiment 2

[0024] 1) Synthesis of polytrimethylene carbonate containing terminal -NCO groups:

[0025] Add 12 grams of polytrimethylene carbonate monododecyl ether, 16.7 grams of 2,4-toluene diisocyanate and 290 ml of dimethyl sulfoxide solvent with a molecular weight of 2500 in the dry reactor, and add the total weight of the above reactants in addition 4‰ of dibutyltin dilaurate, under an inert atmosphere, stirred and reacted at 52°C for 50 minutes, terminated the reaction, and removed excess diisocyanate by dialysis to obtain the target product;

[0026] 2) Synthesis of polyvinyl alcohol-polytrimethylene carbonate graft copolymer:

[0027] Add 10 grams of polytrimethylene carbonate monolauryl ether containing terminal -NCO groups, 7.9 grams of polyvinyl alcohol (molecular weight: 40,000) into the dry reactor, add 210ml of dimethyl sulfoxide to dissolve, add Dibutyltin dilaurate with a total weight of 4‰ of the above-mentioned reactants was stirred and reacted at 52°C for 50 minutes u...

Embodiment 3

[0032] 1) Synthesis of polytrimethylene carbonate containing terminal -NCO groups:

[0033] Add 12 grams of polytrimethylene carbonate monododecyl ether, 15.1 grams of 2,4-toluene diisocyanate and 270 ml of dimethyl sulfoxide solvent with a molecular weight of 3000 in the dry reactor, and add the total weight of the above reactants in addition 5‰ of dibutyltin dilaurate, under an inert atmosphere, stirred and reacted at 55°C for 60 minutes, terminated the reaction, and removed excess diisocyanate by dialysis to obtain the target product;

[0034] 2) Synthesis of polyvinyl alcohol-polytrimethylene carbonate graft copolymer:

[0035] Add 10 grams of polytrimethylene carbonate containing terminal -NCO groups, 7.16 grams of polyvinyl alcohol (molecular weight: 50,000) into the dry reaction bottle, add 205 ml of dimethyl sulfoxide to dissolve, add the total weight of the above reactants 5 ‰ of dibutyltin dilaurate, under an inert atmosphere, stirred and reacted at 55°C for 60 minu...

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PUM

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Abstract

The invention discloses a method for improving the water resistance of polyvinyl alcohol film with polytrimethylene carbonate and polydioxanone. The following steps are adopted: 1) adding polytrimethylene carbonate and diisocyanate into a drying reactor , catalyst and solvent, stirred and reacted at 50-55°C to obtain polytrimethylene carbonate containing terminal-NCO groups; 2) Add polytrimethylene carbonate containing terminal-NCO groups, poly Vinyl alcohol, solvent and catalyst, stirred and reacted at 50-55°C to obtain polyvinyl alcohol-polytrimethylene carbonate graft copolymer; 3) Add polyvinyl alcohol-polytrimethylene carbonate graft copolymer into the drying reactor The branch copolymer, polydioxanone and solvent are stirred and mixed at 40-50°C, film-formed by casting method and dried to obtain the object of the present invention. The preparation process of the invention is simple and easy to master, and the water resistance of the obtained modified membrane is greatly improved.

Description

technical field [0001] The invention relates to a method for improving the water resistance of a polyvinyl alcohol film, belonging to the technical field of polymer film preparation. Background technique [0002] Polyvinyl alcohol is a biomaterial with good biocompatibility and biodegradability, and polyvinyl alcohol film can be used as artificial skin, etc., but polyvinyl alcohol is too hydrophilic, and polyvinyl alcohol film lacks good Water resistance, which limits its application to some extent. Polytrimethylene carbonate and polydioxanone are biomaterials with biocompatibility and biodegradability, excellent water resistance and good blendability with each other. First, the polytrimethylene carbonate segment is introduced into the polyvinyl alcohol segment to form a polyvinyl alcohol-polytrimethylene carbonate graft copolymer to improve the blendability of polyvinyl alcohol, and then polydioxan The ketone segment is added to polyvinyl alcohol-polytrimethylene carbonat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L87/00C08L67/04C08G81/02C08J5/18
Inventor 朱国全王发刚柳玉英
Owner SHANDONG UNIV OF TECH
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