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Modified ethylene propylene terpolymer and preparation method

A modification technology of EPDM rubber, which is applied in the field of rubber, can solve the problems of poor dispersion of modified EPDM rubber, and achieve the effects of enhanced flame resistance, high reactivity, and improved polymer strength

Active Publication Date: 2017-10-10
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a modified EPDM rubber and a preparation method to solve the problem of poor dispersibility of graphene oxide modified EPDM rubber prepared by existing methods

Method used

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  • Modified ethylene propylene terpolymer and preparation method
  • Modified ethylene propylene terpolymer and preparation method

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Embodiment 1

[0041] The embodiment of the present invention provides a modified EPDM rubber, the modified EPDM rubber includes:

[0042] 100 parts of raw EPDM rubber, 6 parts of accelerator, 40 parts of reinforcing agent, 1.5 parts of antiaging agent, 15 parts of softener, 5 parts of hyperbranched phosphoramide modified graphene oxide, and 1 part of vulcanizing agent.

[0043] The embodiment of the present invention also provides a preparation method of the modified EPDM rubber. In the specific description of the method, the usage content of each raw material is as shown above. The method provided by the embodiment of the present invention specifically includes:

[0044] S101: Weigh graphene oxide, and dissolve graphene oxide in chloroform. The mixture of graphene oxide and chloroform was ultrasonically exfoliated for 2 hours at a temperature of 30° C. and an ultrasonic power of 400 W to obtain a graphene oxide suspension. Phosphorus oxychloride, ethylenediamine and anhydrous ferric chl...

Embodiment 2

[0051] The embodiment of the present invention provides a modified EPDM rubber, the modified EPDM rubber includes:

[0052] 100 parts of raw EPDM rubber, 6 parts of accelerator, 40 parts of reinforcing agent, 1.5 parts of antiaging agent, 15 parts of softener, 8 parts of hyperbranched phosphoramide modified graphene oxide, and 1 part of vulcanizing agent.

[0053] The embodiment of the present invention also provides a preparation method of the modified EPDM rubber. In the specific description of the method, the usage content of each raw material is as shown above. The specific steps of the method provided in the embodiment of the present invention are the same as in embodiment 1, except that the mass fraction of the hyperbranched phosphoramide-modified graphene oxide is 8 parts.

[0054] After testing, the modified EPDM rubber prepared in the embodiment of the present invention has a tensile strength of 11.8 MPa, an elongation at break of 617%, a Shore hardness of 54, a maxi...

Embodiment 3

[0056] The embodiment of the present invention provides a modified EPDM rubber, the modified EPDM rubber includes:

[0057] 100 parts of raw EPDM rubber, 6 parts of accelerator, 40 parts of reinforcing agent, 1.5 parts of antiaging agent, 15 parts of softener, 3 parts of hyperbranched phosphoramide modified graphene oxide, and 1 part of vulcanizing agent.

[0058] The embodiment of the present invention also provides a preparation method of the modified EPDM rubber. In the specific description of the method, the usage content of each raw material is as shown above. The specific steps of the method provided in the embodiment of the present invention are the same as in embodiment 1, except that the mass fraction of the hyperbranched phosphoramide-modified graphene oxide is 3 parts, and the vulcanizing agent is benzoyl peroxide.

[0059] After testing, the modified EPDM rubber prepared in the embodiment of the present invention has a tensile strength of 12.25MPa, an elongation a...

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Abstract

The invention provides a modified ethylene propylene terpolymer and a preparation method. According to the invention, easily dispersed hyperbranched phosphoramide modified graphene oxide is obtained in the manner of in situ synthesis of hyperbranched phosphoramide on the surface of the graphene oxide; the modified ethylene propylene terpolymer master batch is obtained in the manner of blending the hyperbranched phosphoramide modified graphene oxide with a softener, an accelerant, a reinforcing agent and an anti-ageing agent; and the modified ethylene propylene terpolymer is obtained in the manner of blending and vulcanizing the modified ethylene propylene terpolymer master batch with a vulcanizing agent. The hyperbranched phosphoramide modified graphene oxide in the modified ethylene propylene terpolymer provided by the invention is uniformly dispersed; and the modified ethylene propylene terpolymer has higher mechanical property, flame retardant property and heat-conducting property, and the limit oxygen index can reach up to 25%. The preparation method for the modified ethylene propylene terpolymer, provided by the invention, is simple and easy to realize, is suitable for large-scale production and is beneficial to industrial popularization.

Description

technical field [0001] The invention relates to the technical field of rubber, in particular to a modified EPDM rubber and a preparation method thereof. Background technique [0002] Ethylene Propylene Diene Monomer (EPDM for short) is a copolymer of ethylene, propylene and a small amount of non-conjugated diene, and is one of the ethylene propylene rubbers. The main chain of EPDM is composed of chemically stable saturated hydrocarbons, and the side chain contains unsaturated double bonds, so EPDM has aging resistance such as ozone resistance, heat resistance, and weather resistance. Due to the aging resistance of EPDM, EPDM is used in automotive parts, waterproof materials for construction, heat-resistant rubber hoses and other fields. However, due to the effect of hot air aging, the side groups of the EPDM polymer chain will still be oxidized, and the main chain will also undergo thermal rearrangement and degradation, making EPDM lose its physical and mechanical propertie...

Claims

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Application Information

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IPC IPC(8): C08L23/16C08K13/02C08K9/04C08K3/04C08K3/22C08K5/09C08K5/18C08K3/36C09K5/14
CPCC08K3/04C08K3/22C08K3/36C08K5/09C08K5/18C08K9/04C08K13/02C08K2003/2296C08L2201/02C09K5/14C08L23/16
Inventor 杨俊坤何程赵明周年荣常亚东熊浩仝子靖
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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