Method for improving water resistance of polyvinyl alcohol film by using poly(trimethylene carbonate) and poly(p-dioxanone)

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: 2014-06-25
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

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 with a molecular weight of 2000, 16.8 grams of 2,4-toluene diisocyanate and 280 ml of dimethyl sulfoxide solvent into the dry reactor, and add the total amount of the above reactants Dibutyltin dilaurate with a weight of 3‰, 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, and add the total weight of the above reactants to 3‰ Dibutyltin dilaurate, under an inert atmosphere, stirred and reacted at 50°C for 40 minutes, the...

Embodiment 2

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

[0025] Add 12 grams of polytrimethylene carbonate monododecyl ether with a molecular weight of 2500, 16.7 grams of 2,4-toluene diisocyanate and 290 ml of dimethyl sulfoxide solvent into the dry reactor, and add the total amount of the above reactants Dibutyltin dilaurate with a weight of 4‰, 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 monododecyl ether containing terminal -NCO groups, 7.9 grams of polyvinyl alcohol (molecular weight: 40,000) into a dry reactor, add 210 ml of dimethyl sulfoxide to dissolve, Add dibutyltin dilaurate with a total weight of 4‰ of the above-mentioned reactants, under an inert atmosphere, stir and react a...

Embodiment 3

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

[0033] Add 12 grams of polytrimethylene carbonate monododecyl ether with a molecular weight of 3000, 15.1 grams of 2,4-toluene diisocyanate and 270 ml of dimethyl sulfoxide solvent into the dry reactor, and add the total amount of the above reactants Dibutyltin dilaurate with a weight of 5‰, 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 m...

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PUM

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Abstract

The invention discloses a method for improving water resistance of a polyvinyl alcohol film by using poly(trimethylene carbonate) and poly(p-dioxanone). The method comprises the following steps of (1) adding poly(trimethylene carbonate), diisocyanate, a catalyst and a solvent into a drying reactor, and reacting while stirring at the temperature of 50-55 DEG C to obtain end-NCO group contained poly(trimethylene carbonate); (2) adding end-NCO group contained poly(trimethylene carbonate), polyvinyl alcohol, a solvent and a catalyst into the drying reactor, and reacting while stirring at the temperature of 50-55 DEG C to obtain a polyvinyl alcohol and poly(trimethylene carbonate) grafted copolymer; (3) adding the polyvinyl alcohol and poly(trimethylene carbonate) grafted copolymer, poly(p-dioxanone) and a solvent into the drying reactor, stirring and mixing at the temperature of 40-50 DEG C, filming by using a tape casting method and drying to obtain a target product required by the invention. The method is simple in preparation process and easy to master, and the water resistance of the obtained modified film 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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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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