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High-mechanical-property self-repairing halogenated butyl rubber material and preparation method thereof

The technology of halogenated butyl rubber and bromobutyl rubber is applied in the field of self-healing halogenated butyl rubber material with high mechanical properties and its preparation, and achieves the effects of high mechanical properties, avoiding molecular structure design and prolonging service life.

Active Publication Date: 2019-12-17
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few simple and practical methods for the high performance and high self-healing efficiency of commercial halobutyl rubber materials. Therefore, in order to meet the requirements of high performance and high self-healing efficiency for commercial halobutyl rubber materials, research and development are urgently needed A Novel, Practical and Simple Crosslinking System

Method used

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  • High-mechanical-property self-repairing halogenated butyl rubber material and preparation method thereof
  • High-mechanical-property self-repairing halogenated butyl rubber material and preparation method thereof
  • High-mechanical-property self-repairing halogenated butyl rubber material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Using the mechanical blending method, first blend 2.5g (3-methyl-4-amino)pyridine, 2.5g 4-carboxypyridine and 100g bromobutyl rubber, and then mold it at 135°C after thinning on the open mill forming. The tensile strength of the obtained sheet is 20.5 MPa, the elastic modulus is 1.7 MPa, the elongation at break is 1510%, and the self-repairing efficiency at 100° C. is 91%.

Embodiment 2

[0027] Using the solution blending method, first dissolve 10g of bromobutyl rubber in 100ml of tetrahydrofuran solution, then add 0.25g of (3-methyl-4-amino)pyridine and 0.25g of 4-carboxypyridine and stir evenly, then add 0.2g magnesium oxide, 0.3g zinc oxide and 0.3g anti-aging agent and other additives were stirred for 1 hour, then poured into a polytetrafluoroethylene mold, and after the solvent was completely evaporated, put it in an oven for vulcanization at 135°C. The tensile strength of the prepared film material is 20.4MPa, the elastic modulus is 1.6MPa, the elongation at break is 1350%, and the self-repairing efficiency at 100°C is 91%.

Embodiment 3

[0029] Using mechanical blending method, first blend 2.5g (3-methyl-4-amino)pyridine, 2.5g 4-carboxypyridine and 100g bromobutyl rubber, then add 2g magnesium oxide, 3g zinc oxide and 3g anti-aging Auxiliaries such as additives are mixed evenly, and molded at 135°C after being thinly passed on the open mill. The tensile strength of the prepared sheet is 21 MPa, the elastic modulus is 1.8 MPa, the elongation at break is 1460%, and the self-repairing efficiency at 100° C. is 87%.

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Abstract

The invention discloses a high-mechanical-property self-repairing halogenated butyl rubber material and a preparation method thereof. According to the invention, pyridine derivatives and halogen atomson brominated or / and chlorinated butyl rubber are subjected to a nucleophilic substitution reaction so as to form a dynamic ion cross bond; the bonding strength of ionic aggregate is regulated and controlled by utilizing the electron withdrawing / donating characteristic and the steric hindrance effect of substituents on the pyridine derivatives; so the mechanical property, the self-repairing temperature and the self-repairing efficiency of the material can be regulated in a very wide range. The preparation method comprises the following steps: carrying out solution blending or mechanical blending on the pyridine derivatives, the brominated or / and chlorinated butyl rubber and other assistants to obtain uniform blended rubber, and carrying out high-temperature vulcanization molding. According to the high-mechanical-property self-repairing halogenated butyl rubber material provided by the invention, the high-strength ionic aggregate endows the halogenated butyl rubber material with high mechanical property, and the ionic aggregate is dissociated and recombined at high temperature to perform self-repairing on the material.

Description

technical field [0001] The invention relates to the technical field of rubber materials, in particular to a self-repairing halogenated butyl rubber material with high mechanical properties and a preparation method thereof. Background technique [0002] As a low modulus, large deformation and reversible polymer, rubber has a wide range of applications in daily life and military industry. Current rubber products are usually vulcanized by irreversible covalent bonds, which makes it difficult for materials to self-repair and recycle after damage, and waste, incineration or landfill treatment cause serious "black pollution". Therefore, seeking a class of new materials that can replace traditional rubber has become a research hotspot around the world. Self-healing rubber materials can heal and restore their mechanical properties when they are damaged by force. At the same time, they have the characteristics of reprocessing and recycling. They are a new material with broad develop...

Claims

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Application Information

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IPC IPC(8): C08L23/28C08K5/3432C08J5/18C08J3/21
CPCC08J3/21C08J5/18C08J2323/28C08K5/3432C08L23/283
Inventor 吴锦荣张林军黄光速熊慧郑静
Owner SICHUAN UNIV
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