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Preparation method of degradable modified vinyl plastic

A polyethylene plastic, polyethylene technology, applied in the field of plastics, can solve problems such as poor water resistance of polyvinyl alcohol, and achieve the effect of improving degradable and water resistance, and improving degradable performance

Active Publication Date: 2016-01-20
贵州联创管业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyvinyl alcohol has poor water resistance and cannot meet people's needs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Step 1, preparation of modified polyethylene: in parts by weight, add 24 parts of polyethylene, 13 parts of borax, 12 parts of urea, 2 parts of glycerin, 15 parts of wood fiber and 12 parts of modified starch to make the volume fraction 10% In the ethanol aqueous solution, wherein the ethanol aqueous solution is 23 parts; under the condition that the temperature is 55°C and the pH is 8.5, the paste is obtained by stirring evenly; the paste mixture is added into the high-pressure reactor, and reacted for 35 minutes under the condition of 2.7MPa, Modified polyethylene can be prepared after the reaction is completed;

[0014] Step 2, preparation of degradable modified polyethylene plastic: by weight, add 12 parts of dialdehyde starch, 13 parts of polyvinyl alcohol, 9 parts of chitosan and 8 parts of sodium carboxymethyl cellulose into the reaction kettle , reacted for 30 minutes under sealed conditions at 88°C; 23 parts of modified polyethylene were added to the head tank,...

Embodiment 2

[0016] Step 1, preparation of modified polyethylene: by weight, 30 parts of polyethylene, 21 parts of borax, 22 parts of urea, 9 parts of glycerin, 22 parts of wood fiber and 21 parts of modified starch were added to make the volume fraction 29%. In the ethanol aqueous solution, wherein the ethanol aqueous solution is 39 parts; the temperature is 72 ° C, the pH is 9.2 under the condition of stirring to obtain a paste; the paste mixture is added to the autoclave, and reacted under the condition of 3.9MPa for 47 minutes, Modified polyethylene can be prepared after the reaction is finished.

[0017] Step 2, preparation of degradable modified polyethylene plastic: by weight, 19 parts of dialdehyde starch, 18 parts of polyvinyl alcohol, 14 parts of chitosan and 17 parts of sodium carboxymethyl cellulose are added to the reactor , reacted for 46 minutes under sealed conditions at 128°C; 31 parts of modified polyethylene were added to the head tank, the temperature of the head tank w...

Embodiment 3

[0019] Step 1, preparation of modified polyethylene: by weight, 36 parts of polyethylene, 28 parts of borax, 30 parts of urea, 13 parts of glycerin, 27 parts of wood fiber and 26 parts of modified starch were added to make the volume fraction 35%. In the ethanol aqueous solution, wherein the ethanol aqueous solution is 48 parts; under the condition that the temperature is 78°C and the pH is 10, the paste is uniformly obtained; the paste mixture is added into the high-pressure reactor, and reacted for 50 minutes under the condition of 4.3MPa, Modified polyethylene can be prepared after the reaction is completed;

[0020] Step 2, preparation of degradable modified polyethylene plastic: by weight, 23 parts of dialdehyde starch, 21 parts of polyvinyl alcohol, 18 parts of chitosan and 22 parts of sodium carboxymethyl cellulose are added to the reactor , reacted for 65 minutes at 143°C under sealed conditions; 39 parts of modified polyethylene were added to the head tank, the temper...

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PUM

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Abstract

The invention discloses a preparation method of degradable modified vinyl plastic and belongs to the field of plastic. The preparation method comprises the steps that under the high pressure condition, modified polyethylene is prepared through modified starch and wood fibers, then the modified polyethylene is added to a mixture of dialdehyde starch, polyvinyl alcohol, chitosan and sodium carboxymethylcellulose, and the degradable modified vinyl plastic is prepared and obtained under the high temperature condition. According to the preparation method of the degradable modified vinyl plastic, the synergistic effect of the modified starch and the wood fibers under the high pressure condition is utilized, and degradability of modified polyethylene is improved; the synergistic effect of polyvinyl alcohol, chitosan and modified polyvinyl is utilized, degradability and water resistance of the vinyl plastic are improved.

Description

technical field [0001] The invention belongs to the field of plastics, in particular to a preparation method of degradable modified polyethylene plastics. Background technique [0002] With the development of social economy and the advancement of science and technology, people's awareness of environmental protection is getting higher and higher, and the problem of white pollution caused by plastic waste is also getting more and more attention. Therefore, materials with biodegradability have become the development of the times. need. Polyvinyl alcohol has excellent transparency and gloss, is a non-charged material, and has a large tensile strength and tear strength, good oil resistance, gas barrier properties, heat sealing and adhesive properties, etc. Especially biodegradability has been given high priority. However, polyvinyl alcohol has poor water resistance and cannot meet people's needs. In the experiment, the composite modifier is used to modify the speed of polyvi...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L97/02C08L3/04C08L29/04C08L5/08C08L1/28C08K3/38C08K5/053C08K5/21
CPCC08L23/06C08L2201/06C08L2205/025C08L2205/035C08L2205/16C08L97/02C08L3/04C08L29/04C08L5/08C08L1/286C08K2003/387C08K5/053C08K5/21
Inventor 李康
Owner 贵州联创管业有限公司
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