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EVA (ethylene-vinyl acetate)-post-crosslinking-modified high-performance glass-fiber reinforced polypropylene composite material and preparation method thereof

A technology of cross-linking modification and composite materials, applied in the field of polymer materials, can solve the problems of reducing the high cost performance of polypropylene composite materials, the improvement of material performance retention rate is not obvious, and the price of additives is expensive, so as to improve the interface condition and weather resistance. Improved performance and good weather resistance

Inactive Publication Date: 2015-09-16
SHANGHAI JUNER NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But only by adding a small amount of additives, not only has little effect, the effect is mostly reflected in the improvement of the surface condition, but the improvement of the performance retention rate of the material is not obvious, and the additive itself is expensive, which reduces the high temperature of polypropylene composite materials. Cost-effective features

Method used

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  • EVA (ethylene-vinyl acetate)-post-crosslinking-modified high-performance glass-fiber reinforced polypropylene composite material and preparation method thereof
  • EVA (ethylene-vinyl acetate)-post-crosslinking-modified high-performance glass-fiber reinforced polypropylene composite material and preparation method thereof
  • EVA (ethylene-vinyl acetate)-post-crosslinking-modified high-performance glass-fiber reinforced polypropylene composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Each component is weighed according to the data of Example 1 shown in Table 1, and the mixed raw material A composed of polypropylene, graft compatibilizer, and EVA block copolymer is placed in the main feeding bin, and the short glass fiber , peroxide cross-linking agent, auxiliary cross-linking agent, the mixed raw material B after mixing is placed in the side feeding bin, and is added into the main barrel of the twin-screw extruder through the respective feeding screws, and the extruder The diameter of the screw is 35mm, the length-to-diameter ratio L / D is 40, the speed of the main engine is set at 200 rpm, and the temperature of each zone of the main barrel (from the feeding port to the outlet of the machine head) is set as: 60 ° C, 160 ° C, 170 ° C °C, 180 °C, 190 °C, 200 °C, 200 °C, after melt extrusion, cooling, granulation, drying and other processes to obtain particles, and then injection molded into standard mechanical Performance test splines.

Embodiment 2

[0048] Each component is weighed according to the data of Example 2 shown in Table 1, and the mixed raw material A composed of polypropylene, graft compatibilizer, and EVA block copolymer is placed in the main feeding bin, and the short glass fiber , peroxide cross-linking agent, auxiliary cross-linking agent, the mixed raw material B after mixing is placed in the side feeding bin, and is added into the main barrel of the twin-screw extruder through the respective feeding screws, and the extruder The diameter of the screw is 35mm, the length-to-diameter ratio L / D is 40, the speed of the main engine is set at 200 rpm, and the temperature of each zone of the main barrel (from the feeding port to the outlet of the machine head) is set as: 60 ° C, 160 ° C, 170 ° C °C, 180 °C, 190 °C, 200 °C, 200 °C, after melt extrusion, cooling, granulation, drying and other processes to obtain particles, and then injection molded into standard mechanical Performance test splines.

Embodiment 3

[0050] Each component is weighed according to the data of Example 3 shown in Table 1, and the mixed raw material A composed of polypropylene, graft compatibilizer, and EVA block copolymer is placed in the main feeding bin, and the short glass fiber , peroxide cross-linking agent, auxiliary cross-linking agent, the mixed raw material B after mixing is placed in the side feeding bin, and is added into the main barrel of the twin-screw extruder through the respective feeding screws, and the extruder The diameter of the screw is 35mm, the length-to-diameter ratio L / D is 40, the speed of the main engine is set at 200 rpm, and the temperature of each zone of the main barrel (from the feeding port to the outlet of the machine head) is set as: 60 ° C, 160 ° C, 170 ° C °C, 180 °C, 190 °C, 200 °C, 200 °C, after melt extrusion, cooling, granulation, drying and other processes to obtain particles, and then injection molded into standard mechanical Performance test splines.

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Abstract

The invention relates to an EVA (ethylene-vinyl acetate)-post-crosslinking-modified high-performance glass-fiber reinforced polypropylene composite material and a preparation method thereof. The composite material is prepared from the following raw materials in percentage by weight: 40-80% of polypropylene, 10-40% of chopped glass fiber, 2-5% of graft compatilizer, 2-10% of EVA block copolymer, 0.5-3% of peroxide crosslinking agent and 1-6% of auxiliary crosslinking agent. The tensile strength and impact strength of the composite material have the most obvious improvement amplitude, and are enhanced by 30-50% as compared with the conventional formula material; and the tensile modulus and bending modulus are correspondingly enhanced to 6000 MPa above. In the 150-DEG C 100-hour long-term hot-oxidative-aging test, the tensile strength, impact strength and other indexes of the composite material can be further enhanced in the early test stage, and the property retention rate is 85% above in the final test stage (>=2000 hours); and thus, the composite material has excellent long-term hot oxidative aging resistance.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a high-performance glass fiber reinforced polypropylene composite material modified by EVA post-crosslinking and a preparation method thereof. Background technique [0002] Polypropylene has excellent comprehensive performance, good chemical stability, good molding and processing type and relatively low price, especially after adding inorganic reinforcing materials such as glass fiber GF, its mechanical properties and heat resistance can be significantly improved. promote. At present, glass fiber reinforced polypropylene composite materials have been widely used in automobiles, home appliances, electric tools, building materials and other fields. [0003] EVA (ethylene-vinyl acetate copolymer, Ethylene-vinyl acetate copolymer) is the most common type of acrylic ester copolymer, which has excellent chemical resistance and anti-aging properties. Among them, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L51/06C08L53/00C08K13/04C08K7/14C08K5/3492
CPCC08L23/14B29C48/92B29C2948/92704C08L2205/03C08L51/06C08L53/00C08K13/04C08K7/14C08K5/34922
Inventor 郑云龙黄志杰杨仓先
Owner SHANGHAI JUNER NEW MATERIALS
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