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Self-repairing polymer

A polymer and self-repairing technology, which is applied in the field of self-repairing polymers, can solve the problems of inability to realize self-repair, limited range of matrix selection, etc., and achieve the effect of uniform distribution of repairing agents, low cost and high repairing efficiency

Inactive Publication Date: 2014-03-26
QINGDAO WINCHANCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method does not require the introduction of additional repair agents or special surface treatment, it requires the material molecules themselves to have a self-repair mechanism, which limits the range of substrates for this repair method, and it is not yet possible to achieve self-repair at room temperature.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Preparation of vinyl monomer microcapsules:

[0017] Add 11.36g of melamine and 24.3g of formaldehyde solution with a mass fraction of 37% and 30ml of deionized water into a three-neck flask, and react for 25 minutes at 65°C and pH 8 to obtain a melamine-formaldehyde prepolymer solution . After natural cooling, add 0.4 g sodium dodecylbenzene sulfonate, 0.12 g polyvinyl alcohol and 41 g glycidyl methacrylate, and emulsify for 30 minutes at a speed of 400 rpm. Slowly adjust the pH value of the reaction system to about 4.1 with 5% glacial acetic acid, and at the same time slowly raise the temperature to 65 °C, and maintain the reaction temperature for 3 hours. The reaction solution was cooled to room temperature, washed with water to leave a layer of product, and filtered.

Embodiment 2

[0019] Add 25g of methyl methacrylate and 1.055g of ethyl acetate into a three-necked flask vented with nitrogen to dissolve them fully, then continue to ventilate with nitrogen, and add 0.071g of azobisisoheptanonitrile and 0.080g of dithiobenzene The mixture of isobutyronitrile formate and cuprous chloride was stirred evenly at a speed of 400-600 r / min, and reacted at 27°C for 3 hours. Take 3 g of the microcapsules prepared in Example 1, uniformly disperse them in the above product at room temperature, mix, degas and solidify at room temperature for 72 hours.

Embodiment 3

[0021] Add 25g of methyl methacrylate and 1.055g of ethyl acetate into a three-necked flask ventilated with nitrogen to dissolve them fully, then continue to ventilate with nitrogen, and add 0.085g of styrene and 0.065g of isobutyronitrile dithiobenzoate in sequence The mixture of ester and cuprous chloride was stirred evenly at a speed of 400-600r / min, and reacted at 27°C for 3 hours. Take 3 g of the microcapsules prepared in Example 1, uniformly disperse them in the above product at room temperature, mix, degas and solidify at room temperature for 48 hours.

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PUM

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Abstract

The invention discloses a self-repairing polymer. The self-repairing polymer is characterized by comprising a polymerizable resin carrier and a capsule containing a vinyl monomer, wherein the polymerizable resin carrier is prepared from a monomer, an initiator and a catalyst; the weight percents of the monomer, the initiator, the catalyst and the capsule containing the vinyl monomer are respectively 79-90%, 0.9-1.2%, 3-7% and 5-20%. The self-repairing polymer has the positive effects that the self-repairing polymer has high repairing efficiency; chemical reaction happens between the carrier and repairing agents of a repairing system disclosed by the invention, thus improving the bonding capacity of a modified material; the self-repairing polymer completes self-repairing at room temperature; heating is not needed in the self-repairing process, and crack repairing is carried out at room temperature; the self-repairing polymer is environment-friendly and is low in cost; the repairing agents are distributed uniformly.

Description

technical field [0001] The present invention relates to a self-healing polymer. Background technique [0002] With the development of science and technology, polymer composite materials with the characteristics of light weight, high strength, corrosion resistance and good insulation properties are widely used in aviation, transportation, construction and sporting goods. However, during the processing and use of materials, affected by external conditions, microcracks and various damages inevitably occur on the surface and inside of materials. These microcracks lead to a decrease in the mechanical properties of the material, shorten the service life of the material, and eventually lead to the overall destruction of the material; in the case of being caught off guard, it will have extremely bad consequences. In polymer materials, delamination and macroscopic cracks visible to the naked eye can be repaired manually; however, for micro-damages that appear inside the material, it...

Claims

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Application Information

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IPC IPC(8): C08L33/12C08F120/14C08F220/14C08F212/08C08F265/04
Inventor 苏建丽
Owner QINGDAO WINCHANCE TECH
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