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Composite polypropylene material and its preparing method

A technology of composite materials and polypropylene, applied in the field of modified polymer materials, can solve the problems of reduced rigidity of materials

Inactive Publication Date: 2007-06-27
吴永刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Another object of the present invention is to provide a preparation method of polypropylene composite material, which adopts the method of multi-component blending and toughening of inorganic rigid particles, and coordinates the use of surface treatment of inorganic rigid particles and toughening agent to make the composite In the case of maintaining good rigidity, the impact strength of the material is greatly improved, so as to overcome the shortcomings of the obvious reduction in the rigidity of the material while the impact strength is improved only by using the toughening agent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The polypropylene composite material of this embodiment includes 80Kg of homopolypropylene, 20Kg of high-density polyethylene, 30Kg of talc particles (grain size 0.001μm), toughening agent SBS 15Kg, and phthalate coupling agent triisostearoyl oxide Isopropyl titanate (TTS) 0.3Kg, the graft compatibilizer maleic anhydride grafted polyethylene 10Kg, the lubricant stearic acid 0.5Kg.

[0055] The preparation process is as follows: first add the inorganic rigid particles to the high-speed mixer, start at low speed, stir at high speed, fully drain the water at a temperature of 90 degrees, add a coupling agent for surface treatment at 120 degrees, and take 8 minutes to make the coupling agent Fully contact with the surface of the inorganic rigid material, then add lubricant and continue to stir for 5 minutes, then add the grafted compatibilizer, stir for 5 minutes, then the material can be discharged;

[0056] Then, the treated inorganic rigid particles, polypropylene, polyethyle...

Embodiment 2

[0059] The preparation process is the same as in Example 1. The difference is that the polypropylene composite material of this example includes copolymer polypropylene 60Kg, high-density polyethylene 5Kg, nano-level talc powder 10Kg and barium sulfate particles 20Kg, toughening agent POE10Kg, long chain alkane Base trimethoxysilane coupling agent 0.1Kg, acrylic acid anhydride grafted polypropylene 5Kg, lubricant stearic acid amide 0.1Kg, antioxidant 1010 0.15Kg.

[0060] After testing, the properties of polypropylene composite materials are: melt index 9±1g / 10min, tensile strength 28MPa, elongation at break ≥320%, bending strength 30MPa, bending modulus 1280MPa, and notched impact strength of simply supported beam 35kJ / m2 ; Molding shrinkage is 1.15%. The combination of inorganic rigid particles and toughening agents increases the flexural modulus of polypropylene composites by more than 19% compared with ordinary toughening systems.

Embodiment 3

[0062] The preparation process is the same as that of Example 1, except that the polypropylene composite material of this example includes copolymer polypropylene 60Kg, metallocene polyethylene 5Kg, talc (nano) 10Kg, glass microbead particles 15Kg, toughening agent POE 5Kg, Silane coupling agent vinyl trimethoxy silane 0.25Kg, graft compatibilizer maleic anhydride grafted polypropylene 5Kg, lubricant oleic acid amide 0.8Kg, antioxidant B215 0.3Kg.

[0063] After testing, the properties of polypropylene composite materials are: melt index 15±1g / 10min, tensile strength 23MPa, elongation at break ≥460%, bending strength 33MPa, bending modulus 1500MPa, and notched impact strength of simply supported beam 48kJ / m2 ; Mold shrinkage is 1.1%. Through the coordination of the inorganic rigid particles and the toughening agent, the impact strength and flexural modulus of the polypropylene composite material are improved, and the flexural modulus is increased by more than 27%.

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Abstract

The composite polypropylene material is prepared with polypropylene 10-100 weight portions, polyethylene 1-50 weight portions, inorganic rigid grain 1-50 weight portions, toughener 1-50 weight portions, coupling agent 0.01-10 weight portions and grafting compatilizer 1-50 weight portions. The composite polypropylene material has high rigidity, high impact strength and balanced rigidity and toughness, and compared with common automobile bumper material, it has 15-30 % higher bending modulus.

Description

Technical field [0001] The invention relates to a polypropylene composition and belongs to the field of modified polymer materials. Background technique [0002] At present, when talc is added to polypropylene composite materials for automobile bumpers to increase the rigidity of the composite material, the toughness of the composite material is reduced; and when toughening agents are added to improve the toughness of the composite material, the toughness of the composite material is also reduced. Later, the rigidity of the material dropped significantly, and it was difficult to achieve a good balance between the two. In this way, when the impact strength of the composite material of the automobile bumper is first ensured to meet the requirements, the rigidity is often restricted by the conditions and it is difficult to reach a higher state. Therefore, the impact strength of the automobile bumper composite material is higher than 40KJ / m 2 In this case, the flexural modulus ...

Claims

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Application Information

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IPC IPC(8): C08L23/10C08L23/06C08K7/20B29C47/40B29B9/12
Inventor 吴永刚
Owner 吴永刚
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