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Polypropylene voltage-resisting insulating resin and preparation method thereof

A technology of polypropylene resin and insulating resin, which is applied in the field of polypropylene voltage-resistant insulating resin and its preparation, and can solve the problems of no polypropylene voltage-resistant breakdown insulating resin

Active Publication Date: 2014-05-14
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no research on polypropylene withstand voltage breakdown insulating resin in China

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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 γ-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, 22...

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Abstract

The invention provides a polypropylene voltage-resisting insulating resin and a preparation method thereof. The polypropylene voltage-resisting insulating resin comprises the following components in parts by mass: 100 parts of mixed resin and 0.5-5 parts of silicon dioxide, wherein the mixed resin comprises the following components in parts by mass: 10-30 parts of pre-irradiated polypropylene resin, 45-80 parts of polypropylene resin and 10-25 parts of polypropylene-polystyrene resin. The invention further provides the preparation method of the polypropylene voltage-resisting insulating resin. The polypropylene voltage-resisting insulating resin is good in voltage breakdown resistance and the breakdown field strength is up to 33.2KV / mm.

Description

technical field [0001] The invention belongs to the technical field of insulating resins, and in particular relates to a polypropylene voltage-resistant insulating resin and a preparation method thereof. Background technique [0002] Polypropylene and polystyrene are widely used general-purpose polymer materials, and both polymers have their own unique performance advantages and application areas. Polypropylene is a crystalline material with high strength, but its low-temperature impact performance is poor; while polystyrene has high modulus and tensile strength and outstanding voltage resistance, but its toughness is poor. The material itself is very brittle and prone to fracture. The compatibility between these two polymers is extremely poor due to the difference in chemical structure, crystallization behavior, etc. between the two materials. [0003] In power systems, XLPE insulation materials have been widely used in high-voltage and ultra-high-voltage plastic-insulate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L25/08C08L23/12C08L23/14C08K3/36C08J3/28
CPCC08J3/28C08J2323/12C08J2323/14C08K2201/011C08L23/12C08L23/14C08L2203/202C08L2205/025C08L2205/035C08L25/06C08K3/36
Inventor 姚占海李文斐黄鹏涛
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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