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Method for improving antioxidant efficiency of antioxidants for polymer materials

A technology of polymer materials and antioxidants, which is applied in the field of thermo-oxidative stability of polymer materials, can solve problems such as lack of anti-oxidation effect and accelerated polymer aging, so as to expand the processing temperature window, reduce degradation and aging, Environmentally friendly effect

Active Publication Date: 2014-10-15
SICHUAN UNIV
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Problems solved by technology

[0005] In addition, it is also reported that there are synergistic and antagonistic effects between different antioxidants, pointing out that if the antioxidants are properly compounded, it can not only improve product performance, enhance the antioxidant effect, but also reduce costs; but if Improper matching will not only fail to achieve anti-oxidation effect, but may also accelerate the aging of polymers
[0006] It can be seen that the antioxidant efficiency of antioxidants in the prior art can be improved through the reasonable compounding of antioxidants, but there is no related report that the effect of other substances and antioxidants can improve their antioxidant efficiency

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  • Method for improving antioxidant efficiency of antioxidants for polymer materials
  • Method for improving antioxidant efficiency of antioxidants for polymer materials
  • Method for improving antioxidant efficiency of antioxidants for polymer materials

Examples

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Effect test

Embodiment 1

[0049] Antioxidants AO and TrG are added to isotactic PP to improve the thermal oxygen stability of PP. The specific raw materials and their weight ratios are shown in Table 1.

[0050] The specific preparation method is as follows:

[0051] The first step, at first prepare raw materials by above-mentioned components;

[0052] In the second step, first place isotactic PP and thermally reduced graphene (TrG) in a 60°C oven for 12 hours;

[0053] Then, the isotactic PP, TrG and AO obtained in the second step were put into the torque rheometer and mixed for 10 minutes, and the processing temperature was 180°C, and the compound was taken out from the torque rheometer and shredded.

[0054] The obtained PP / AO / TrG composite material was pressed into a 0.5mm thick sheet by compression molding to test the barrier properties of the material. The molding temperature was 190°C and the pressure was 10MPa.

[0055] image 3 DSC degradation curves for pure PP, PP / TrG, PP / AO and PP / AO / TrG...

Embodiment 2-10

[0063] The raw material of embodiment 2-10 and its weight ratio are as shown in table 1, and its preparation method is the same as embodiment 1, and experimental result all shows: after adding antioxidant and graphene simultaneously, gained polymer / antioxidant / graphene The composite material is higher than the Ti of the polymer / antioxidant and polymer / graphene system (under the air atmosphere, the thermal decomposition temperature of the polymer / antioxidant / graphene composite is higher than that of the polymer / graphene composite). The decomposition temperature is 20°C higher, and the thermal decomposition temperature of the polymer / antioxidant / graphene composite is nearly 26°C higher than that of the polymer / antioxidant composite); and the OIT is also significantly improved, higher than The sum of the OIT of adding antioxidant alone or adding graphene alone (the OIT of polymer / antioxidant / graphene composite is close to twice the sum of OIT adding antioxidant alone and adding gr...

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Abstract

The invention belongs to the technical field of the thermal oxidation stability performance of polymer materials and particularly relates to a method for improving the antioxidant efficiency of antioxidants for the polymer materials. The method comprises adding the antioxidants and a third component into the polymer materials. The proportional ratio of the polymer materials, the antioxidants and the third component is, by weight ratio, 100: 0.1-5: 0.1-5, wherein the third component is graphene or nano clay. According to the method improving the antioxidant efficiency of the antioxidants for the polymer materials, by means of the oxygen insulation effects and the radical absorption capability of the graphene and the nano clay and due to the fact that the antioxidants are organic small molecules and can promote the dispersive characteristic of nano fillings, the simple and effective method of simultaneously adding the graphene or the nano clay and the antioxidants improves the antioxidant efficiency of the antioxidants for the polymer materials and meanwhile enhances the thermal oxidation stability performance of the polymer materials.

Description

technical field [0001] The invention belongs to the technical field of thermo-oxidative stability properties of polymer materials, and in particular relates to a method for improving the oxidation resistance efficiency of antioxidants used in polymer materials. Background technique [0002] Most polymer materials such as plastics, rubber, fibers, adhesives, etc. will inevitably undergo aging degradation due to external effects such as heat, light, oxygen, or stress during processing, storage, and use, resulting in surface becoming sticky, Discoloration, cracking and embrittlement, changes in physical and mechanical properties, and then make the material lose its use value. In industry, oxidation inhibitors, namely antioxidants, are usually used to inhibit or delay the oxidative degradation process of polymer materials and prolong the service life of materials. [0003] Antioxidants for polymer materials should generally meet the following requirements: good oxidation resist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K13/02C08K5/09C08K3/04C08K5/13C08K3/34C08K5/134C08L23/12C08L23/06C08L67/02C08L77/02C08L77/06
Inventor 黄亚江杨俊龙吕亚栋杨其李光宪
Owner SICHUAN UNIV
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