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Fatigue-resisting natural rubber nano composite material and preparation method thereof

A technology of nano-composite materials and natural rubber, which is applied in the field of fatigue-resistant natural rubber nano-composites and its preparation, and can solve the problems that rubber materials are difficult to achieve fatigue resistance.

Active Publication Date: 2010-06-16
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To meet such requirements in traditional methods, it is necessary to add part of high-structure carbon black to ensure the mechanical properties of the material while adding large particle size carbon black. It is difficult for the rubber material prepared in this way to achieve a high level of fatigue resistance.

Method used

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  • Fatigue-resisting natural rubber nano composite material and preparation method thereof
  • Fatigue-resisting natural rubber nano composite material and preparation method thereof
  • Fatigue-resisting natural rubber nano composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 100 parts of natural rubber and 5 parts of nano-montmorillonite were mechanically intercalated on a double-roller mixer, and then 2 parts of stearic acid, 5 parts of zinc oxide, N-isopropyl-N'-phenyl-p-phenyl 1 part of diamine, 1 part of 2,2,4-trimethyl-1,2-dihydroquinoline polymer, 20 parts of carbon black filler, 1 part of N-cyclohexyl-2-benzothiazole sulfenamide and 2 parts of sulfur, and then mold the rubber material with a flat vulcanizing machine at a temperature of 143° C. and a pressure of 12 MPa for 13 minutes to obtain a fatigue-resistant natural rubber nanocomposite material test piece. The tested tensile strength at break was 26.21Mpa, the elongation at break was 551.0%, the hardness (Shore A) was 52, and the 58% compression fatigue life was 1.554 million times, as shown in Table 3 for details.

Embodiment 2

[0051] 100 parts of natural rubber and 1 part of nano-montmorillonite are mechanically intercalated on a double-roller mixer, and then 2 parts of stearic acid, 5 parts of zinc oxide, N-isopropyl-N'-phenyl-p-phenyl 1 part of diamine, 1 part of 2,2,4-trimethyl-1,2-dihydroquinoline polymer, 26 parts of carbon black filler, 1 part of N-cyclohexyl-2-benzothiazole sulfenamide and 2 parts of sulfur, and then mold the rubber material with a flat vulcanizer at a temperature of 143°C and a pressure of 12 MPa for 13 minutes to obtain a fatigue-resistant natural rubber nanocomposite material test piece. The tested tensile strength at break was 25.76Mpa, the elongation at break was 542.2%, the hardness (Shore A) was 52, and the 58% compression fatigue life was 1.336 million times, as shown in Table 3 for details.

Embodiment 3

[0053] 100 parts of natural rubber and 7 parts of nano-montmorillonite were mechanically intercalated on a double-roller mixer, and then 3 parts of stearic acid, 5 parts of zinc oxide, 2, 2, 4-trimethyl-1, 2 -1 part of dihydroquinoline polymer, 15 parts of carbon black filler, 1.5 parts of mercaptobenzothiazole, 1 part of N-cyclohexyl-2-benzothiazole sulfenamide, 0.5 part of tetramethylthiuram disulfide part and 0.5 part of sulfur, and then the rubber material was molded with a flat vulcanizing machine at a temperature of 135 ° C and a pressure of 15 MPa for 30 minutes to obtain a fatigue-resistant natural rubber nanocomposite test piece. The tested tensile strength at break was 25.18Mpa, the elongation at break was 549.2%, the hardness (Shore A) was 51, and the 58% compression fatigue life was 1.291 million times. See Table 3 for details.

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Abstract

The invention discloses a fatigue-resisting natural rubber nano composite material and a preparation method thereof. The preparation method is characterized by comprising the following steps of: carrying out mechanical intercalation on 100 parts of natural rubber and 1-7 parts of nano montmorillonoid, then adding 4-8 parts of vulcanizing activator, 1-4 parts of anti-aging agent, 15-50 parts of carbon black packing, 0.5-3 parts of vulcanizing accelerator and 0.5-3 parts of vulcanizing agent, then adding gelatine into a flat-plate vulcanizing machine, and carrying out mould pressing for 10-30 minutes with the temperature of 135-155 DEG C and the pressure of 10-15MPa to obtain the fatigue-resisting natural rubber nano composite material. The invention substitutes the traditional high-structure carbon black packing by adopting the organic nano montmorillonoid, reduces the thermogenesis of the material under the dynamic loading effect and the same hardness by adopting less packing usage amounts, effectively prevents internal cracks of the material from generating and expanding by utilizing the layered structure of the nano montmorillonoid, and obtains a series of natural rubber materials with excellent fatigue-resisting performance without sacrificing the tensile breaking strength and the breaking elongation ratio of the material at the same time.

Description

technical field [0001] The patent relates to a fatigue-resistant natural rubber nanocomposite material and a preparation method thereof, belonging to the field of high polymer molding processing. Background technique [0002] Vulcanized natural rubber is widely used in automobiles, railway locomotives, Various engineering fields such as aerospace and machinery manufacturing. However, the polyisoprene that constitutes natural rubber is linked by covalent bonds. In the service environment, it is easy to cause thermal oxygen aging due to internal heat generation under cyclic stress, and cracks and degradation due to cross-linking and hardening. Loss of strength or fatigue failure due to creep and rapid crack growth. In June 1998, the German ICE-884 high-speed train derailment accident caused 101 deaths, which was caused by the fatigue failure of rubber elastic components. Therefore, improving the fatigue life of rubber materials and preparing natural rubber materials with ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08K13/06C08K9/04C08K3/34C08K3/04C08K3/06
Inventor 黄光速曲亮靓翁更生聂仪晶吴锦荣
Owner SICHUAN UNIV
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