Rotational molding grade cross-linked polyethylene wear-resistant composite and preparation method thereof

A technology for cross-linking polyethylene and composite materials, applied in the field of composite materials and their preparation, to achieve the effects of low material cost, excellent processing performance, and wide application space

Active Publication Date: 2012-06-13
江苏广鼎管业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A rotomolding grade cross-linked polyethylene wear-resistant composite material, its raw material ratio is as follows:

[0036] component ratio / %

[0037] LLDPE 89.63

[0038] UHMWPE 4.48

[0039] DCP 0.3

[0040] TAIC 0.17

[0041] Antioxidant 1010 0.94

[0042] MoS 2 4.48

[0043] First, carry out surface treatment on molybdenum disulfide: weigh a certain amount of coupling agent according to the experimental plan, and add a small amount of ethanol aqueous solution. Weigh the inorganic filler, place it in a high-speed mixer, raise the temperature to 60°C while stirring at a high speed, and add the coupling agent solution dropwise with a dropper. Continue to mix at high speed for 20 minutes after the dropwise addition is completed. After the mixing is completed, take out the treated filler and dry it in a blast drying oven at 120°C for 1 hour to obtain the surface-treated inorganic filler; then prepare the wear-resistant composite material:...

Embodiment 2

[0061] A rotomolding grade cross-linked polyethylene wear-resistant composite material, its raw material ratio is as follows:

[0062] component ratio / %

[0063] LLDPE 78.09

[0064] UHMWPE 15.62

[0065] DCP 0.3

[0066] TAIC 0.17

[0067] Antioxidant 1010 0.94

[0068] MoS 2 4.48

[0069] The preparation method of the rotomoulding grade cross-linked polyethylene wear-resistant composite material is the same as that of Example 1.

[0070] The performance test result of embodiment 2:

[0071] Cross-linking degree: 76.54%

[0072] Melt mass flow rate: 3.76g / l0min

[0073] Zero shear viscosity: 5200 Pa°s

[0074] Shore hardness: 51

[0075] Tensile strength: 17.14MPa

[0076] Elongation at break: 668.34%

[0077] Wear rate: 6.85×10 -10 kg×(N×m) -1

[0078] Friction coefficient: 0.45

Embodiment 3

[0080] A rotomolding grade cross-linked polyethylene wear-resistant composite material, its raw material ratio is as follows:

[0081] component ratio / %

[0082] LLDPE 71.89

[0083] UHMWPE 21.57

[0084] DCP 0.3

[0085] TAIC 0.17

[0086] Antioxidant 1010 0.93

[0087] MoS 2 5.14

[0088] The preparation method of the rotomoulding grade cross-linked polyethylene wear-resistant composite material is the same as that of Example 1.

[0089] The performance test result of embodiment 3:

[0090] Cross-linking degree: 77.54%

[0091] Melt mass flow rate: 1.48g / l0min

[0092] Zero shear viscosity: 5700 Pa°s

[0093] Shore hardness: 52

[0094] Tensile strength: 14.97MPa

[0095] Elongation at break: 668.34%

[0096] Wear rate: 5.99×10 -10 kg×(N×m) -1

[0097] Friction coefficient: 0.42

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Abstract

The invention discloses a rotational molding grade cross-linked polyethylene wear-resistant composite and a preparation method thereof. The rotational molding grade cross-linked polyethylene wear-resistant composite is prepared by the steps of mixing a base material, which is linear low-density polyethylene (granular or powdery) commonly used in a rotational molding process, with a cross-linking agent and an assistant cross-linking agent uniformly, absorbing for 80-120 minutes at 85 DEG C, and then adding ultra-high molecular weight polyethylene, an inorganic filler and other components for improving the wear resistance of the base. The rotational molding grade cross-linked polyethylene wear-resistant composite disclosed by the invention comprises the following components in percentage by weight: 76.7-79% of linear low-density polyethylene, 0.15-4% of cross-linking agent, 0.15-1% of antioxidant, 4-19% of ultra-high molecular weight polyethylene and 4-12% of inorganic filler subjected to surface treatment.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to a rotomolding grade cross-linked polyethylene wear-resistant composite material and a preparation method thereof. Background technique [0002] Polyethylene (PE) is the variety with the largest output among general-purpose synthetic resins. It has excellent low temperature resistance (the lowest operating temperature can reach -70~-100°C), good chemical stability, and can withstand most acid and alkali erosion (not resistant to Acid with oxidizing properties), insoluble in general solvents at room temperature, and has low water absorption, but because it is a linear molecule, it can be slowly dissolved in some organic solvents without swelling, and has excellent electrical insulation properties; but polyethylene is resistant to environmental stress ( chemical and mechanical action) is very sensitive, heat aging resistance [0003] Poor, low mechanical stre...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L23/06C08K13/06C08K9/06C08K9/04C08K3/00B29B9/06
Inventor 吉林
Owner 江苏广鼎管业科技有限公司
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