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Antistatic high-rigidity rotational-moulded polyethylene composition and preparation method thereof

A high-rigidity, polyethylene technology, applied in the field of rotomoulding polyethylene composition and its preparation, can solve the antistatic performance of nano-carbon fiber synergistically modified polyethylene, which affects the performance of CNF composite materials, aspect ratio and specific surface area Large and other problems, to achieve the effect of highlighting antistatic performance, good resistance to environmental stress cracking, and improving mechanical properties

Inactive Publication Date: 2013-12-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since CNF is mostly prepared by cracking hydrocarbon gas at high temperature, its surface is rich in a large amount of carbon elements and is chemically inert. In addition, the aspect ratio and specific surface area of ​​CNF are large, so it is easy to entangle with each other and aggregate. Agglomeration, it is difficult to disperse uniformly in the polymer matrix, which directly affects the performance of CNF composites
[0006] At present, there is no literature report on the antistatic properties of polyethylene synergistically modified by nano-carbon fibers

Method used

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  • Antistatic high-rigidity rotational-moulded polyethylene composition and preparation method thereof
  • Antistatic high-rigidity rotational-moulded polyethylene composition and preparation method thereof
  • Antistatic high-rigidity rotational-moulded polyethylene composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add carbon nanofibers (CNF) and diluted aminopropyltriethoxysilane coupling agent KH550 to the high-speed mixer successively, and mix at 80°C for 8 minutes to modify the surface of CNF. The amount of surface modifier 0.5% of the weight of CNF. 100 parts of LLDPE with a melt flow rate of about 5g / 10min, 0.4 parts of octadecyl dimethyl hydroxyethyl quaternary ammonium nitrate, 0.6 parts of polyorganoboron, 0.1 part of CNF after surface modification, four [β -(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol 0.05 part, tris(2,4-di-tert-butylphenyl) phosphite 0.1 part, ethylenediamine distearyl Add 0.08 parts of amide into a high-speed mixer, mix for 5 minutes, and then extrude and granulate through a twin-screw extruder at a normal processing temperature of 180-240°C to obtain a polyethylene composition for rotomolding. The mechanical properties are shown in Table 1.

Embodiment 2

[0029]Add CNF and diluted bis(dioctyloxypyrophosphate)ethylene titanate coupling agent NDZ-311 successively to the high-speed mixer, and mix at 80°C for 9 minutes to modify the surface of CNF, wherein The surface modifier was used in an amount of 1% by weight of CNF. 100 parts of LLDPE with a melt flow rate of about 5g / 10min, 0.1 part of polyoxyethylene stearate, 1 part of surface-modified CNF, tetrakis[β-(3,5-di-tert-butyl-4-hydroxybenzene Base) propionic acid] pentaerythritol ester 0.05 parts, 1,3,5, tris (3,5-di-tert-butyl, 4-hydroxybenzyl)-s-triazine-2,4,6-(1H,3H,5H) Add 0.1 part of triketone, 0.2 part of bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite, and 0.05 part of acyl stearic acid into the high-speed mixer, mix for 5 minutes, and then add the Under the condition of 240°C, the polyethylene composition for rotomolding was obtained by extruding and granulating with a twin-screw extruder, and its mechanical properties are shown in Table 1.

Embodiment 3

[0031] Add CNF and diluted distearoyloxyisopropoxyaluminate coupling agent SG-Al821 to the high-speed mixer successively, and mix at 80°C for 10 minutes to modify the surface of CNF, wherein the surface modifier The dosage is 3% of CNF weight. 100 parts of LLDPE with a melt flow rate of about 5g / 10min, 0.5 parts of octylphenol polyoxyethylene ether, 0.8 parts of surface-modified CNF, 1,3,5-tris(4-tert-butyl-3- Add 0.7 part of hydroxy-2,6-dimethylbenzyl)1,3,5-triazine-2,4,6-(1H,3H,5H)-trione and 0.1 part of erucamide into the high-speed mixer , mixed for 5 minutes, and then extruded and granulated by a twin-screw extruder at a conventional processing temperature of 180-240° C. to obtain a polyethylene composition for rotomolding. The mechanical properties are shown in Table 1.

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Abstract

The invention discloses an antistatic high-rigidity rotational-moulded polyethylene composition. The antistatic high-rigidity rotational-moulded polyethylene composition comprises the following components: 100 parts by weight of linear low-density polyethylene, 0.1-1.5 parts by weight of antistatic agent, 0.1-1 part by weight of surface modified carbon nanofibers, 0.05-1 part by weight of antioxidant and 0.05-0.10 part by weight of rheology modifier. The invention also provides the preparation method of the composition. The antistatic high-rigidity rotational-moulded polyethylene composition provided by the invention has an outstanding antistatic function; the volume resistivity of the antistatic high-rigidity rotational-moulded polyethylene composition is less than 1*10<8> ohm.cm; the antistatic effect of the antistatic high-rigidity rotational-moulded polyethylene composition is lasting; the volume resistivity of the antistatic high-rigidity rotational-moulded polyethylene composition almost has no change after being soaked in water for 8 months; in addition, the composition also has better rigidity-tenacity balance; the impact strength of the composition is improved by at least 20% and the bending modulus of the composition is improved by more than 30%; simultaneously, the composition is good in environmental stress crack resistance, resin homogeneity and processability.

Description

technical field [0001] The invention belongs to the field of macromolecular materials, and in particular relates to an antistatic high-rigidity rotationally molded polyethylene composition and a preparation method thereof. Background technique [0002] Rotational molding is a process method for forming hollow plastic products, also known as rotational molding. Compared with injection molding and blow molding processes, rotational molding has the outstanding advantages of less investment in equipment and molds, and is suitable for the production of medium and large plastic products with complex shapes. The products have almost no internal stress and are not easy to deform. As a new plastic molding method, rotational molding is attracting the attention of the plastic processing industry with an astonishing growth rate in recent years. In 2007, the total consumption of rotomoulding LLDPE raw materials in my country exceeded 50,000 tons. In 2008, the market consumption of LLDPE...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08K13/06C08K9/06C08K9/04C08K7/06B29B9/06
Inventor 陈枫
Owner CHINA PETROLEUM & CHEM CORP
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