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Polyamide 66 composite material and preparing method thereof

A composite material and polyamide technology, applied in the field of polyamide 66 composite materials, can solve the problems of reduced material strength, impact toughness, low thermal deformation temperature, and high water absorption, so as to achieve no drop in impact toughness, better surface properties, and improved performance price effect

Inactive Publication Date: 2003-11-12
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it also has the disadvantages of high water absorption, low heat distortion temperature and low modulus, which limit its application.
Filling modification is usually used to improve its dimensional stability and rigidity. For example, filling polyamide 66 with inorganic substances such as glass fiber, carbon fiber, kaolin, and talc can improve the strength, modulus, and heat resistance of the material, but at the same time cause The strength of the material, especially the impact toughness, is reduced, and the specific gravity of the composite material is greatly increased due to the large filling amount of inorganic substances.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]Example 1: Preparation of organic nano-montmorillonite: Add 100 parts of montmorillonite with a total cation exchange capacity of 100meq / 100g, add 1000 parts of water, stir at a high speed for 0.5 hours after uniform dispersion, and obtain montmorillonite suspension A. Add 200 parts of water to 1 part of concentrated hydrochloric acid and 5 parts of cetyltrimethylammonium chloride, heat up to 60-100°C and stir until a uniform protonated solution B is formed. Then keep warm at 60-100°C, add liquid B dropwise to liquid A, stir at high speed for 3 hours, cool, wash with water, dry, mechanically pulverize, and vacuum dry to obtain nano-organized montmorillonite.

[0035] Preparation of modified wollastonite: add 0.5 part of KH550 acetone solution to 100 parts of wollastonite with a particle size of 1200 mesh, the weight fraction ratio of KH550 to acetone is 0.5%, stir at high speed, and dry to obtain modified wollastonite.

[0036] Screw parameters

Embodiment 2、3

[0037] Embodiment 2,3: with embodiment 1, wherein wollastonite is respectively 20 parts, 40 parts. The samples were characterized by the same method as in Example 1, and the results are shown in Table 1.

Embodiment 4

[0038] Embodiment 4: 100 parts of polyamide 66 (with embodiment 1), 5 parts of nano-organized montmorillonite, 10 parts of wollastonite, 0.2 part of 1010 antioxidant, 0.2 part of EPS lubricant, adopt the same as embodiment 1 method processing. The samples were characterized by the same method as in Example 1, and the results are shown in Table 1.

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PUM

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Abstract

The present invention discloses a polyamide 66 composite material in which the montmorillonite and wollastonite are synergistic and filled and its preparation method. Said composite material comprises (by weight portion) 100 portions of polyamide 66, 1-10 portions of nano organized montmorillonite and 1-50 portions of modified wollastonite, in which said nano organized montmorillonite is a montmorillonite mineral powder treated by alkyl intercalation agent, and the wollastonite is a natural needle-shaped mineral powder treated by coupling agent. Said raw material components and antioxidant and lubricating agent are mixed together, and molten, mixed and extruded by twin screw extruder machine to obtain the invented high-performance montmorillonite and wollastonite synergistically modified polyamide 66 composite material with high modulus and heat-resisting property.

Description

technical field [0001] The invention relates to a polyamide 66 composite material, in particular to a polyamide 66 composite material in which two inorganic materials are co-filled in proportion. [0002] The invention also relates to a preparation method of the polyamide 66 composite material. Background technique [0003] Polyamide 66 resin is widely used in the field of engineering plastics due to its good strength, rigidity, oil resistance, wear resistance and other excellent properties. However, it also has the disadvantages of high water absorption, low heat distortion temperature and low modulus, which limit its application. Filling modification is usually used to improve its dimensional stability and rigidity. For example, filling polyamide 66 with inorganic substances such as glass fiber, carbon fiber, kaolin, and talc can improve the strength, modulus, and heat resistance of the material, but at the same time cause The strength of the material, especially the imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C48/40C08K9/00C08L77/00
CPCB29C48/40
Inventor 张明侠赵斌阳明书
Owner INST OF CHEM CHINESE ACAD OF SCI