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PP/PE composite material with high fluidity, high impact resistance and low emission based on electrostatic self-assembly and preparation method of PP/PE composite material

An electrostatic self-assembly, composite material technology, applied in the field of polymer materials, can solve problems such as unfavorable polymer melt processing flow, and achieve the effects of low emission, low processing energy consumption, and high environmental protection

Pending Publication Date: 2020-08-21
华合新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The liquid EPDM rubber and ethylene-octene copolymer POE used in CN105504524B are the most common elastomer toughening agents in PP toughening modification, and are famous for having extremely long flexible molecular chains in the material structure, but Flexible molecular chains inherently can greatly improve the material's absorption of external impact energy. However, in the process of melt processing, its too tight molecular chain winding is not conducive to the processing flow of polymer melts. Similar technical solutions also appear in In CN102229720A and CN103923381B, therefore, the above-mentioned elastomer toughening modification method is limited to some application fields that require relatively low processing fluidity, and for some modification fields that require both high flow and high impact resistance. New toughening techniques are needed to make up for its deficiencies

Method used

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  • PP/PE composite material with high fluidity, high impact resistance and low emission based on electrostatic self-assembly and preparation method of PP/PE composite material
  • PP/PE composite material with high fluidity, high impact resistance and low emission based on electrostatic self-assembly and preparation method of PP/PE composite material
  • PP/PE composite material with high fluidity, high impact resistance and low emission based on electrostatic self-assembly and preparation method of PP/PE composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] According to the data of Example 1 shown in Table 1, the polypropylene resin, inorganic filler, elastic ionomer, auxiliary dispersant, and processing stabilizer were weighed out in proportion, and mixed uniformly to obtain mixed raw materials.

[0044] Place the dried mixed raw materials in the main feed bin of a twin-screw extruder that is tightly meshed and rotates in the same direction, and add the feed screw to the barrel of the extruder; place the modified polyethylene resin in the In the side feeding bin of the extruder screw, it is added to the extruder barrel through the feeding screw. The diameter of the screw extruder used is 40mm, the length-to-diameter ratio L / D is 56, and the temperature of each zone of the main barrel from the feeding port to the head outlet is set to: 100℃, 170℃, 180℃, 190℃, 180℃ , 180℃, 190℃, 190℃, 190℃, the main engine speed is 250 rpm, after melt extrusion, granulation, drying treatment and other processes, the high flow, high impact resi...

Embodiment 2

[0046] According to the data of Example 2 shown in Table 1, the polypropylene resin, inorganic filler, elastic ionomer, co-dispersant, and processing stabilizer were weighed out in proportion, and mixed uniformly to obtain mixed raw materials.

[0047] Place the dried mixed raw materials in the main feed bin of a twin-screw extruder that is tightly meshed and rotates in the same direction, and add the feed screw to the barrel of the extruder; place the modified polyethylene resin in the In the side feeding bin of the extruder screw, it is added to the extruder barrel through the feeding screw. The diameter of the screw extruder used is 40mm, the length-to-diameter ratio L / D is 56, and the temperature of each zone of the main barrel from the feeding port to the head outlet is set to: 100℃, 170℃, 180℃, 190℃, 180℃ , 180℃, 190℃, 190℃, 190℃, the main engine speed is 250 rpm, after melt extrusion, granulation, drying treatment and other processes, the high flow, high impact resistance,...

Embodiment 3

[0052] According to the data of Example 3 shown in Table 1, the polypropylene resin, inorganic filler, elastic ionomer, auxiliary dispersant, and processing stabilizer were weighed out in proportion, and mixed uniformly to obtain mixed raw materials.

[0053] Place the dried mixed raw materials in the main feed bin of a twin-screw extruder that is tightly meshed and rotates in the same direction, and add the feed screw to the barrel of the extruder; place the modified polyethylene resin in the In the side feeding bin of the extruder screw, it is added to the extruder barrel through the feeding screw. The diameter of the screw extruder used is 40mm, the length-to-diameter ratio L / D is 56, and the temperature of each zone of the main barrel from the feeding port to the head outlet is set to: 100℃, 170℃, 180℃, 190℃, 180℃ , 180℃, 190℃, 190℃, 190℃, the main engine speed is 250 rpm, after melt extrusion, granulation, drying treatment and other processes, the high flow, high impact resi...

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Abstract

The invention relates to a PP / PE composite material with high fluidity, high impact resistance and low emission based on electrostatic self-assembly and a preparation method of the PP / PE composite material. The PP / PE composite material is specifically prepared from the following raw materials in parts by weight; 30-80 parts of polypropylene resin, 5-15 parts of modified polyethylene resin, 5-20 parts of an inorganic filler, 2-10 parts of an elastic ionomer, 1-3 parts of a dispersing aid, and 1-4 parts of a processing stabilizer, wherein the modified polyethylene resin is polyethylene resin with a specific chemical structure, which is obtained by chemically grafting propanesulfonic acid polar monomers to molten ultra-density polyethylene (ULDPE) resin through free radical initiation. The toughening modification based on the electrostatic interaction force between groups can perfectly balance the performance of high fluidity and high impact resistance and modification requirements of thepolypropylene composite material. According to the obtained polypropylene composite material, the melt index (230 DEG C, 2.16 kg) is greatly increased to 60 g / 10 min or above from 20-30 g / 10 min in atraditional scheme, and the spiral line length of the polypropylene composite material is increased by 30-50% on year-on-year basis during low-temperature (190 DEG C) injection molding.

Description

Technical field [0001] The invention belongs to the technical field of polymer materials, and specifically relates to a PP / PE composite material with high flow, high impact resistance and low emission based on electrostatic self-assembly and a preparation method thereof. Background technique [0002] The resistance to external impact of polymer materials is closely related to its chemical structure and its aggregate structure. Taking the current common polymer types as an example, polycarbonate (PC) has better impact resistance due to its rigid and flexible molecular chain chemical structure, while polyamide (PA) materials are due to the formation of amide groups. The intermolecular hydrogen bonding force has further improved the toughness of the material. However, different from the above-mentioned high-performance engineering plastics, some widely used and low-cost polyolefin materials such as polypropylene and polystyrene do not have the above-mentioned structural characteris...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L51/06C08L23/08C08L23/32C08K3/34
CPCC08L23/12C08L2205/04C08L2205/03C08K2201/005C08L51/06C08L23/0876C08K3/34C08L23/32
Inventor 徐凯华
Owner 华合新材料科技股份有限公司
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