Method for reinforcing silicone rubber by applying liquid crystal polymer microfibrillation

A technology of liquid crystal polymer and silicone rubber, which is applied in the field of rubber reinforcement, can solve the problems of low mechanical properties and achieve the effects of low thermal expansion coefficient, low density and enhanced mechanical properties

Inactive Publication Date: 2018-03-27
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical properties of pure silicone rubber are not high, so the bulk silicone rubber can only use it as a matrix, and adopt appropriate methods to improve its performance.

Method used

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  • Method for reinforcing silicone rubber by applying liquid crystal polymer microfibrillation
  • Method for reinforcing silicone rubber by applying liquid crystal polymer microfibrillation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The liquid crystal macromolecule microfibrillation reinforced silicone rubber composite material of the present embodiment comprises 50 parts by mass of methyl vinyl silicone rubber, 50 parts by mass of methylphenyl vinyl silicone rubber, 30 parts by mass of fumed silica, Composed of 5 parts by mass of liquid crystal polymer and 2 parts by mass of dicumyl peroxide, the tensile strength of the molded product is 2.40 MPa, and the elongation at break is 251.06%. The SEM picture is as follows figure 1 shown, from figure 1 It can be seen that there is a fiber structure on the fracture surface of the liquid crystal polymer microfibrillated reinforced silicone rubber composite.

[0027] The preparation method of the liquid crystal polymer microfibrillation reinforced silicone rubber composite material in this embodiment is carried out according to the following steps:

[0028] (1) According to silicone rubber methyl vinyl silicone rubber, methyl phenyl vinyl silicone rubber, ...

Embodiment 2

[0034] The liquid crystal polymer microfibrillation reinforced silicone rubber composite material of the present embodiment comprises 50 parts by mass of methyl vinyl silicone rubber, 50 parts by mass of methylphenyl vinyl silicone rubber, 25 parts by mass of fumed silica, Composed of 10 parts by mass of liquid crystal polymer and 2 parts by mass of dicumyl peroxide, the tensile strength of the molded product is 2.29MPa, and the elongation at break is 218.92%.

[0035] The preparation method of the liquid crystal polymer microfibrillation reinforced silicone rubber composite material in this embodiment is carried out according to the following steps:

[0036] (1) According to silicone rubber methyl vinyl silicone rubber, methyl phenyl vinyl silicone rubber, fumed silica, benzoxazine resin, zirconium boride, carbon fiber and dicumyl peroxide;

[0037] (2) Firstly, masticate methyl vinyl silicone rubber and methyl phenyl vinyl silicone rubber to form wrapped rolls, add fumed whi...

Embodiment 3

[0042] The liquid crystal polymer microfibrillation reinforced silicone rubber composite material of the present embodiment comprises 50 parts by mass of methyl vinyl silicone rubber, 50 parts by mass of methylphenyl vinyl silicone rubber, 25 parts by mass of fumed silica, Composed of 15 parts by mass of liquid crystal polymer and 2 parts by mass of dicumyl peroxide, the tensile strength of the molded product is 2.07 MPa, and the elongation at break is 205.89%.

[0043] The preparation method of the liquid crystal polymer microfibrillation reinforced silicone rubber composite material in this embodiment is carried out according to the following steps:

[0044] (1) According to silicone rubber methyl vinyl silicone rubber, methyl phenyl vinyl silicone rubber, fumed silica, benzoxazine resin, zirconium boride, carbon fiber and dicumyl peroxide;

[0045](2) Firstly, masticate methyl vinyl silicone rubber and methyl phenyl vinyl silicone rubber to form wrapped rolls, add fumed whi...

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Abstract

The invention belongs to the field of silicone rubber reinforcement and in particular relates to a method for reinforcing silicone rubber by applying liquid crystal polymer microfibrillation. Ingredients of a composite material comprise high temperature vulcanized silicone rubber, white carbon black and liquid crystal polymers. A preparation method comprises the following steps: firstly preparingmaterials according to the ingredients, uniformly mixing on a mixer by adopting a melting and heat mixing method, and then vulcanizing, so that the silicone rubber-based composite material is obtained. the method provided by the invention has the advantages that the liquid crystal polymers can be fibrillated into a fibrous structure in a processing process, anchoring effect is achieved, mechanicalproperties of the silicone rubber-based composite material are improved, and the development requirement that the future silicone rubber-based composite material gives consideration to flame retardance, heat resistance, low density and high strength at the same time.

Description

technical field [0001] The invention belongs to the field of rubber reinforcement, and in particular relates to a method for reinforcing silicon rubber by microfibrillation of liquid crystal polymers. Background technique [0002] Silicone rubber material is an important material for the development of my country's national economy. It not only provides daily life and medical supplies for residents, but also has a very wide range of applications in construction, transportation, aerospace, electronics and military. In recent years, with the development of my country's overall economy and the improvement of science and technology, traditional rubber materials have been difficult to meet the needs of modern social development due to the limitation of production level and insufficient performance. Silicone rubber has the characteristics of low residue, low smoke and low characteristic signal, excellent weather resistance and erosion resistance. Compared with other silicone rubb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/07C08L101/12C08K3/36C08K5/14B29C35/02
CPCB29C35/02C08L83/04C08L2201/02C08L2201/08C08L2205/025C08L2205/03C08L101/12C08K3/36C08K5/14
Inventor 李勇李佳怡张冬恒
Owner NORTHEASTERN UNIV
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