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Polyethylene geomembrane having environmental stress cracking resistance and preparation method thereof

A technology of environmental stress resistance and polyethylene, which is applied in the field of preparation of the polyethylene geomembrane, can solve the problems of limited output and difficult to obtain supply guarantee, so as to reduce production costs, increase environmental stress cracking resistance, and source wide range of effects

Inactive Publication Date: 2019-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitations of many conditions, there are not many petrochemical companies in the world that can produce high-density polyethylene geomembrane special resins, and the output is limited. Many domestic geomembrane manufacturers can only use expensive imported resins, but it is difficult to obtain reliable ones. supply guarantee

Method used

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  • Polyethylene geomembrane having environmental stress cracking resistance and preparation method thereof
  • Polyethylene geomembrane having environmental stress cracking resistance and preparation method thereof
  • Polyethylene geomembrane having environmental stress cracking resistance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 1) Add cage-type silsesquioxane and bimodal high-density polyethylene into a high-mixer according to a weight ratio of 50:50 and mix evenly to obtain the first premix; then add the first premix to the bimodal The screw extruder is used for mixing and plasticizing, the screw speed is 200 rpm, the extrusion temperature is between 180 and 200°C, and the cage-type silsesquioxane color masterbatch is obtained after extrusion and granulation.

[0051] 2) Carbon black and bimodal high-density polyethylene are added to the high mixer according to the weight ratio of 30:70 and mixed uniformly to obtain the second premix; then the second premix is ​​added to the twin-screw extruder for mixing Refining and plasticizing, the screw speed is 200 rpm, the extrusion temperature is between 180 and 200°C, and the carbon black masterbatch is obtained after extrusion and granulation.

[0052] 3) prepare materials according to the following proportions by weight:

[0053]

[0054] 4) Ad...

Embodiment 2

[0058] 1) Add cage-type silsesquioxane and bimodal high-density polyethylene into a high-mixer according to a weight ratio of 30:70 and mix evenly to obtain the first premix; then add the first premix to the bimodal The screw extruder is used for mixing and plasticizing, the screw speed is 200 rpm, the extrusion temperature is between 180 and 200°C, and the cage-type silsesquioxane color masterbatch is obtained after extrusion and granulation.

[0059] 2) Carbon black and bimodal high-density polyethylene are added to the high mixer according to the weight ratio of 30:70 and mixed uniformly to obtain the second premix; then the second premix is ​​added to the twin-screw extruder for mixing Refining and plasticizing, the screw speed is 200 rpm, the extrusion temperature is between 180 and 200°C, and the carbon black masterbatch is obtained after extrusion and granulation.

[0060] 3) prepare materials according to the following proportions by weight:

[0061]

[0062] 4) Ad...

Embodiment 3

[0066] 1) Add cage-type silsesquioxane and bimodal high-density polyethylene into a high-mixer according to a weight ratio of 30:70 and mix evenly to obtain the first premix; then add the first premix to the bimodal The screw extruder is used for mixing and plasticizing, the screw speed is 200 rpm, the extrusion temperature is between 180 and 200°C, and the cage-type silsesquioxane color masterbatch is obtained after extrusion and granulation.

[0067] 2) Carbon black and bimodal high-density polyethylene are added to the high mixer according to the weight ratio of 30:70 and mixed uniformly to obtain the second premix; then the second premix is ​​added to the twin-screw extruder for mixing Refining and plasticizing, the screw speed is 200 rpm, the extrusion temperature is between 180 and 200°C, and the carbon black masterbatch is obtained after extrusion and granulation.

[0068] 3) prepare materials according to the following proportions by weight:

[0069]

[0070] 4) Ad...

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Abstract

The invention provides a polyethylene geomembrane having environmental stress cracking resistance, which includes polyethylene, polyhedral oligomeric silsesquioxane master batch, carbon black color master batch, and an antioxidant; wherein the weight content of the polyethylene is 43 to 85 wt%, the weight content of the polyhedral oligomeric silsesquioxane master batch is 10 to 50 wt%, the weightcontent of the carbon black color master batch is 2 to 5 wt%, and the weight content of the antioxidant is 0.5 to 2 wt%. The polyhedral oligomeric silsesquioxane master batch includes polyhedral oligomeric silsesquioxane and polyethylene, wherein the content of the polyhedral oligomeric silsesquioxane is 20 to 50 wt%, and the structural general formula of the polyhedral oligomeric silsesquioxane is (RSiO1.5)8, R being a C6-C10 linear alkyl group, preferably a heptyl group. The polyethylene geomembrane contains a certain amount of high-molecular chain physical entanglement points, so that slippage of the high-molecular chains during expansion of the cracks in the geomembrane is delayed, thus improving the environmental stress cracking resistance.

Description

technical field [0001] The invention relates to a polyethylene geomembrane, in particular to a polyethylene geomembrane with enhanced environmental stress cracking resistance and a preparation method of the polyethylene geomembrane. Background technique [0002] High-density polyethylene geomembrane (HDPE geomembrane) is a kind of geosynthetic material produced with thermoplastic high-density polyethylene as the main resin, adding carbon black, antioxidant, etc. important part of the system. Because of its good mechanical strength, chemical corrosion resistance, anti-seepage performance and welding performance, it is widely used in landfills, reservoirs, mines, petrochemical irrigation areas and other projects. Polyethylene geomembrane has extremely low permeability and is mainly used for anti-seepage in civil engineering. Compared with traditional waterproof materials, polyethylene geomembrane has the advantages of low permeability coefficient, good low temperature flexib...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L83/04C08K3/04C08K5/526C08J5/18
Inventor 武鹏朱天戈杨化浩赵彦霞丁金海者东梅
Owner CHINA PETROLEUM & CHEM CORP