A kind of polypropylene voltage-resistant insulating resin and preparation method thereof
A polypropylene resin and insulating resin technology, applied in the field of polypropylene voltage-resistant insulating resin and its preparation, can solve the problem of no polypropylene voltage-resistant breakdown insulating resin and the like
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Embodiment 1
[0030] Propylene-ethylene copolymer, ethylene mass percentage content 2%, under air atmosphere, in 60 Pre-irradiation with γ on the Co device, the pre-irradiation dose is 4kGy, and the pre-irradiated propylene-ethylene copolymer is obtained;
[0031] 10 parts by mass of pre-irradiated propylene-ethylene copolymer, 80 parts by mass of propylene-ethylene copolymer with ethylene mass percentage content of 8%, and mass parts of polypropylene-polystyrene resin with polystyrene mass percentage content of 60% 10 parts were added to the high-speed mixer together, mixed for 3 minutes to obtain a mixed resin; 5 parts by mass of nano-silica was added to the high-speed mixer, and mixed with the mixed resin for 3 minutes to obtain a mixed material; the mixed material was added to Extrusion was carried out in the hopper of a Haake twin-screw extruder. The screw diameter of the Haake twin-screw extruder is 24mm, the length-to-diameter ratio is 40, and the temperature of each section from th...
Embodiment 2
[0035] The homopolypropylene is pre-irradiated with β-rays on an electron accelerator device under an air atmosphere, and the pre-irradiation dose is 50kGy to obtain pre-irradiated homopolypropylene;
[0036] Add 30 parts by mass of pre-irradiated homopolypropylene, 45 parts by mass of homopolypropylene, and 25 parts by mass of polypropylene-polystyrene resin with a polystyrene mass percentage of 20% into a high-speed mixer , mixed for 3 minutes to obtain a mixed resin; add 0.5 parts by mass of nano-silica into a high-speed mixer, and continue mixing with the mixed resin for 3 minutes to obtain a mixed material; add the mixed material to the SHJ-30 twin-screw extruder hopper , to extrude. The screw diameter of the SHJ-30 twin-screw extruder is 30mm, and the aspect ratio is 44. It is heated in 11 stages from the feeding port to the die, and the temperature of each stage is 130, 150, 170, 190, 210, 220, 230, 230, 230, 230, 205 ° C, the material is extruded, drawn, cooled, and g...
Embodiment 3
[0038] Homopolymerized polypropylene, under air atmosphere, in 60 Pre-irradiation with gamma rays on the Co device, the pre-irradiation dose is 15kGy, to obtain pre-irradiated homopolypropylene;
[0039]20 parts by mass of pre-irradiated homopolypropylene, 65 parts by mass of propylene-ethylene copolymer with ethylene mass percentage content of 2%, and 15 mass parts of polypropylene-polystyrene resin with polystyrene mass percentage content of 30% Add 3 parts into the high-speed mixer together, and mix for 3 minutes to obtain a mixed resin; add 3 parts by mass of nano-silica into the high-speed mixer, and continue mixing with the mixed resin for 3 minutes to obtain a mixed material; add the mixed material to SHJ -30 twin-screw extruder hopper for extrusion. The screw diameter of the SHJ-30 twin-screw extruder is 30mm, and the length-to-diameter ratio is 44. It is heated in 11 stages from the feeding port to the die, and the temperature of each stage is 130, 150, 170, 190, 210...
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