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High-fluidity high-strength high-toughness polypropylene composite material and preparation method thereof

A high-toughness polypropylene and composite material technology, applied in the field of polymer materials, can solve the problems of reduced fluidity and small amplitude, and achieve the effect of improving impact strength, excellent performance, significant lubricity and low melt viscosity characteristics

Inactive Publication Date: 2018-07-13
SHANGHAI PRET COMPOSITES +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding ordinary thermoplastic elastomers and inorganic fillers to the PP system at the same time can increase the strength and toughness at the same time, but the range of both increases is not large, and the fluidity is greatly reduced.

Method used

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  • High-fluidity high-strength high-toughness polypropylene composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] First weigh 96.6% of polypropylene, 1% of hyperbranched polymer, 1680.3% of antioxidant, and 0.1% of antioxidant DSTP into a high-speed mixer and mix for 3-5 minutes according to the following parts by weight. After being mixed evenly, the mixture is placed in the main feeding bin of the intermeshing co-rotating twin-screw extruder, and is added into the barrel of the extruder through the feeding screw, and 2% organically modified montmorillonite is weighed from The feeding port of the melting section is added to the extruder. The screw diameter of the extruder is 35mm, the length-to-diameter ratio L / D is 40, and the temperature of each zone of the main barrel from the feeding port to the exit of the machine head is set as: 190°C, 200°C , 200°C, 200°C, 200°C, 210°C, 210°C, the speed of the main machine is 250 rpm, and the polypropylene composite material is obtained through melt extrusion, cooling, granulation, and drying.

[0028] Product performance test:

[0029] Me...

Embodiment 2

[0031] First weigh 94.6% of polypropylene, 3% of hyperbranched polymer, 0.3% of antioxidant 168, and 0.1% of antioxidant DSTP in the following parts by weight and put them into a high-speed mixer and mix for 3-5 minutes. After being mixed evenly, the mixture is placed in the main feeding bin of the intermeshing co-rotating twin-screw extruder, and is added into the barrel of the extruder through the feeding screw, and 2% organically modified montmorillonite is weighed from The feeding port of the melting section is added to the extruder. The screw diameter of the extruder is 35mm, the length-to-diameter ratio L / D is 40, and the temperature of each zone of the main barrel from the feeding port to the exit of the machine head is set as: 190°C, 200°C , 200°C, 200°C, 200°C, 210°C, 210°C, the speed of the main machine is 250 rpm, and the polypropylene composite material is obtained through melt extrusion, cooling, granulation, and drying.

[0032] Product performance test:

[0033...

Embodiment 3

[0035] First weigh 89.6.% of polypropylene, 5% of hyperbranched polymer, 0.3% of antioxidant 168, and 0.1% of antioxidant DSTP in the following parts by weight and put them into a high-speed mixer and mix for 3-5 minutes. After being mixed evenly, the mixture is placed in the main feeding bin of the intermeshed co-rotating twin-screw extruder, and is added into the barrel of the extruder through the feeding screw, and 5% organically modified montmorillonite is weighed from The feeding port of the melting section is added to the extruder. The screw diameter of the extruder is 35mm, the length-to-diameter ratio L / D is 40, and the temperature of each zone of the main barrel from the feeding port to the exit of the machine head is set as: 190°C, 200°C , 200°C, 200°C, 200°C, 210°C, 210°C, the speed of the main machine is 250 rpm, and the polypropylene composite material is obtained through melt extrusion, cooling, granulation, and drying.

[0036] Product performance test:

[0037...

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Abstract

The invention discloses a high-fluidity high-strength high-toughness polypropylene composite material. The high-fluidity high-strength high-toughness polypropylene composite material comprises the following raw materials of: in percent by weight, 69-97% of polypropylene, 1-20% of inorganic nano filler, 1-30% of hyperbranched polymer and 0.1-1% of an antioxidant. Compared with traditional linear toughening agents, the hyperbranched polymer has a spatial spherical structure and a smaller hydrodynamic radius, and exhibits the characteristics of remarkable lubricity and low melt viscosity, so thatthe impact strength of the material is improved, and meanwhile the melt fluidity of PP and other polyolefin materials is improved greatly; in addition, a better property of dispersion of inorganic nanoparticles is achieved, and therefore a reinforcing effect of the inorganic nanoparticles on the material can be further achieved, so that the product has excellent performance especially in an inorganic nano-reinforced system.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polypropylene-based modified material. The material is at least composed of the following three components: polymer matrix, inorganic nanoparticles, hyperbranched polymer, and other components may also be contained. The modified material is characterized by high strength and toughness at the same time, and high fluidity at the same time. Background technique [0002] Among all plastics, polypropylene has the lowest cost, the smallest density, and the easiest molding process, so polypropylene is the most used polymer material in automobiles. While polypropylene materials provide a large amount of high-quality and cheap materials for the automobile industry, the development of automobile lightweight also puts forward higher requirements on the performance of polypropylene raw materials for parts. Thinning can be achieved without lowering the standard of the parts, so ...

Claims

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Application Information

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IPC IPC(8): C08L23/14C08L101/00C08K3/34C08K5/526
CPCC08K2201/003C08K2201/011C08L23/14C08L101/005C08K3/346C08K5/526
Inventor 赵丽萍蔡青周文
Owner SHANGHAI PRET COMPOSITES
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