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Method for polyethylene to graft glycidyl methacrylate

A technology of branching methacrylic acid and glycidyl ester, which is applied in the field of grafting, can solve the problems of cumbersome processing, harsh reaction conditions, and difficult recycling, and achieve the effects of simple processing, high grafting rate, and convenient recycling

Inactive Publication Date: 2010-08-11
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome that the existing polyethylene (PE) grafted glycidyl methacrylate (GMA) radiation method uses an organic solvent as the reaction medium, which is harmful to the human body, easily causes environmental pollution, and the post-reaction treatment is loaded down with trivial details, The GMA monomer is not easy to recycle, and the pre-radiation needs to be carried out under nitrogen protection and dry ice temperature, and the radiation dose is high, resulting in harsh reaction conditions and other defects. A kind of water is provided as the reaction medium, and no organic is used in the grafting process. Solvent, high grafting rate, simple post-reaction treatment, convenient monomer recovery, economical and environmental protection, and a method of PE grafting GMA that can be carried out in the air at room temperature with low-dose radiation

Method used

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  • Method for polyethylene to graft glycidyl methacrylate
  • Method for polyethylene to graft glycidyl methacrylate
  • Method for polyethylene to graft glycidyl methacrylate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The influence of embodiment 1 radiation dose on grafting rate

[0026] Polyethylene non-woven fabric grafted with glycidyl methacrylate, comprising the following steps:

[0027] (1) Use electron beams to irradiate PE non-woven fabrics at room temperature in air, and the radiation doses are 10kGy, 30kGy, and 70kGy;

[0028] (2) Add GMA, 0.5% Tween-20 and water by 5% by volume, the amount of water used is to make the total volume of the system 100mL, and stir for 1 hour to make the GMA disperse evenly;

[0029] (3) Add 0.2 g of pre-radiation PE non-woven fabric, add a vent valve, vent nitrogen to remove oxygen, and then seal;

[0030] (4) The above reaction system was stirred and reacted at 100 rpm in a water bath at 55°C for 15 minutes;

[0031] (5) Stop the reaction, take out the grafted non-woven fabric, extract it with acetone and put it into a vacuum drier for drying.

[0032] Calculate the grafting rate under different radiation doses, the results are as follows ...

Embodiment 2

[0033] The influence of embodiment 2 grafting reaction time on grafting rate

[0034] Polyethylene non-woven fabric grafted with glycidyl methacrylate, comprising the following steps:

[0035] (1) Use electron beams to irradiate PE non-woven fabrics at room temperature in air, and the radiation dose is 30kGy;

[0036] (2) GMA, 0.5% Tween-20 and water were added at a volume ratio of 5%, and the amount of water used was to make the total volume of the system 100 mL. Stir for 1 hour to disperse the GMA evenly;

[0037] (3) Add 0.2 g of pre-radiation PE non-woven fabric, add a vent valve, vent nitrogen to remove oxygen, and then seal;

[0038] (4) Stir the above system in a water bath at 55° C. at a speed of 100 rpm and react for a certain period of time;

[0039] (5) Stop the reaction, take out the grafted non-woven fabric, extract it with acetone and put it into a vacuum drier to dry.

[0040] Calculate the grafting rate under different grafting reaction time, the result is ...

Embodiment 3

[0041] The influence of embodiment 3 temperature on grafting rate

[0042] Polyethylene non-woven fabric grafted with glycidyl methacrylate, comprising the following steps:

[0043] (1) Use electron beams to irradiate PE non-woven fabrics at room temperature in air, and the radiation dose is 30kGy;

[0044] (2) GMA, 0.5% Tween-20 and water were added at a volume ratio of 5%, and the amount of water used was to make the total volume of the system 100 mL. Stir for 1 hour to disperse the GMA evenly;

[0045] (3) Add 0.2g of pre-irradiated PE non-woven fabric, add a vent valve, vent nitrogen to remove oxygen, and then seal;

[0046] (4) The above system was stirred and reacted at 100 rpm in a water bath at 25°C, 45°C, 55°C, and 75°C for 15 minutes;

[0047] (5) Stop the reaction, take out the grafted non-woven fabric, extract it with acetone and put it into a vacuum drier to dry.

[0048] Calculate the grafting rate at different grafting reaction temperatures, the results are as...

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Abstract

The invention discloses a method for polyethylene to graft glycidyl methacrylate. The method includes the following steps: under the condition of room temperature, polyethylene is preirradiated into the air, in water containing dispersing agent and under the condition of no oxygen and heating, and grafting reaction is carried out on the polyethylene initiated by pre-irradiation and glycidyl methacrylate, thus completing grafting. The invention takes water as reaction medium, no organic solvent is used in grafting process, grafting efficiency is high, reaction post processing is simple, monomer recovery is convenient, the method is economic and environmentally friendly, and the method can be carried out in low dosage irradiation at normal temperature in the air.

Description

technical field [0001] The invention relates to a grafting method, in particular to a method for grafting polyethylene with glycidyl methacrylate. Background technique [0002] Polyethylene (PE) non-woven fabrics have many excellent properties: good waterproof and air permeability, can isolate many chemical liquids, dry and wet particles, immersion in water will not affect its physical properties, and at the same time can allow enough air and water vapor to penetrate , and because the fibers are continuous, the sheet has excellent strength, tear resistance, puncture resistance, and burst resistance. Therefore, PE non-woven fabrics are very suitable for use as gasket materials. PE non-woven fabric is grafted with glycidyl methacrylate (GMA) to form PE-g-PGMA non-woven fabric, which can make the polyethylene polymer chain have epoxy groups, and the epoxy groups can be used in various A chemical modification to make it more widely used. [0003] The commonly used PE grafting ...

Claims

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Application Information

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IPC IPC(8): C08F255/02C08F2/54C08F2/46D06M14/28
Inventor 马红娟王敏
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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