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
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[0026] Example 1
[0027] Add carbon nanofibers (CNF) and diluted aminopropyltriethoxysilane coupling agent KH550 into the high-speed mixer successively, and mix at 80°C for 8 minutes to modify the surface of CNF. The amount of surface modifier It is 0.5% of CNF weight. Combine 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 polyorgano boron, 0.1 part of CNF after surface modification, four (β) -(3,5-Di-tert-butyl-4-hydroxyphenyl)propionic acid) pentaerythritol ester 0.05 parts, tris(2,4-di-tert-butylphenyl) phosphite 0.1 part, ethylenediamine bis-stearyl Add 0.08 part 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.
Example Embodiment
[0028] Example 2
[0029] Add CNF and the diluted bis(dioctyloxypyrophosphate) ethylene titanate coupling agent NDZ-311 into a high-speed mixer successively, mix at 80°C for 9 minutes, and modify the surface of CNF. The amount of surface modifier is 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 CNF after surface modification, tetra[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) 0.1 part of triketone, 0.2 part of bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite, and 0.05 part of acyl stearate were added to the high-speed mixer, mixed for 5 minutes, and then processed at a normal processing temperature of 180~ The polyethylene composition for rotomolding was obtained by extruding and granulating through a twin-screw extruder at 240°C. The mechanical properties are shown...
Example Embodiment
[0030] Example 3
[0031] Add CNF and the diluted distearoyloxyisopropoxyaluminate coupling agent SG-Al821 into the high-speed mixer successively, and mix at 80℃ for 10 minutes to modify the surface of CNF. 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 CNF after surface modification, 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 to the high-speed mixer Mixing for 5 minutes, and then extruding and granulating 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.
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