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High-strength rubber composite material with excellent processability and preparation method thereof

A technology of rubber materials and composite materials, applied in the field of composite materials, can solve the problems of reduced mechanical properties, reduced dynamic properties and fatigue properties, limited application fields and consumption, etc.

Active Publication Date: 2021-07-06
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the application, there is a common problem that the tensile strength and tear strength of the vulcanized rubber decrease significantly with the increase of the amount of liquid isoprene rubber. Limit its application field and consumption
Especially for products that are subjected to dynamic stress and strain during use, such as tires, pressure hoses, etc., the reduction in mechanical properties will also lead to a reduction in the dynamic performance and fatigue performance of the product

Method used

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  • High-strength rubber composite material with excellent processability and preparation method thereof
  • High-strength rubber composite material with excellent processability and preparation method thereof
  • High-strength rubber composite material with excellent processability and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Example 1 and Comparative Example 1-3 were mixed by method 1, and Example 2-3 was mixed by method 2 to prepare the mixed rubber.

[0041] The formula system of each embodiment and comparative example, by weight, is as shown in the following table:

[0042]

[0043]

[0044] S1: Replace the air in the clean polymerization bottle with high-purity nitrogen under the condition of high-temperature baking, and replace it at least three times. After it cools down, introduce 148g of refined anhydrous and oxygen-free hexane under the protection of nitrogen, and then Add 41 g of polymer grade isoprene monomer and mix well.

[0045] S2: Add a total of 4.2ml of n-BuLi for polymerization and mistericide into the polymerization bottle with a syringe, and polymerize at 50°C for 4 hours while stirring.

[0046] S3: transfer out 95.32 g of the polymerization liquid after S2 polymerization, stop coagulation with methanol, and dry to constant weight to obtain low molecular weight p...

Embodiment 2

[0050] In Example 2 and Example 3, the modified polyisoprene is prepared by anionic polymerization, and the structure regulator tetrahydrofuran is added to the polymerization solvent, and the preparation process is the same as that of Example 1. The specific input amount of materials is: 22.4g of polymerization-grade isoprene monomer, 67.2g of hexane, 5.8g of tetrahydrofuran, 2.6ml of 0.99mol / L n-BuLi initiator, and 0.86ml of silane coupling agent KH561 was added in the later stage of polymerization. The molecular weight of the obtained modified polyisoprene is 1.36×10 4 g / mol, molecular weight distribution index is 1.52, microstructure content: 3,4-structure content accounts for 68.65%, 1,2-structure content accounts for 12.10%, 1,4-structure content accounts for 19.25%.

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Abstract

The invention relates to the field of composite materials, and particularly provides a high-strength rubber composite material with excellent processability and a preparation method thereof. According to the rubber composition, siloxane-terminated and modified low-molecular-weight polyisoprene is mainly used to replace oils in a diene and white carbon black formula system, so that the processability of the rubber composite material is improved, the tensile strength and tear strength of the composite material vulcanized rubber are remarkably improved, and the anti-fatigue performance of the material is further improved.

Description

technical field [0001] The invention relates to the field of composite materials, and in particular provides a high-strength rubber composite material with excellent processability and a preparation method thereof. Background technique [0002] Reactive plasticizer is a kind of polymer rubber material that can be vulcanized with the base material (such as: NR, IR, IIR, SBR, BR, NBR, CR, EPDM and other polymer rubber materials) with sulfur or peroxide liquid material. Most of the common reactive plasticizers are low molecular weight diolefin polymers, which are high-viscosity liquids at room temperature. The unsaturated bonds in the molecular structure provide co-crosslinking reactive groups for them, and there is no trace in the product after vulcanization. Migration and products are not extracted in the solvent, which improves the aging resistance and chemical resistance of the products. Now, as an environmentally friendly plasticizing material, it has gradually replaced t...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08L9/06C08L9/00C08K13/04C08K3/06C08K7/26C08K3/04C08K3/22C08K5/09
CPCC08L7/00C08L9/06C08K2003/265C08L2205/025C08L2205/03C08L9/00C08K13/04C08K3/06C08K7/26C08K3/04C08K3/22C08K5/09
Inventor 何丽霞孙立水刘莉严志轩马骥刘光烨
Owner QINGDAO UNIV OF SCI & TECH
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