Nylon 66 alloy and preparation method thereof

A nylon and alloy technology, applied in the field of polymer composite materials, can solve the problems of increased material density and poor mechanical properties of materials, and achieve the effects of low density, excellent performance and excellent electromagnetic shielding performance

Active Publication Date: 2021-07-02
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN200910176507 discloses an ABS composite material with electromagnetic shielding function; Chinese patent CN200680056752 discloses an electromagnetic shielding material compositely filled with polyester with stainless steel fibers and carbon nanotubes; the above patents all use the electromagnetic shielding filler and resin Composite materials with electromagnetic shielding function are obtained by twin-screw mixed extrusion. These methods will cause a series of problems, such as a large increase in material density and poor mechanical properties of materials.

Method used

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  • Nylon 66 alloy and preparation method thereof
  • Nylon 66 alloy and preparation method thereof
  • Nylon 66 alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) The polyaniline is soaked in 3 times the weight of tetrahydrofuran solvent for 5 minutes, filtered, and dried to obtain pretreated polyaniline for use.

[0027] (2) Dissolving nylon 66 salt in water to obtain a nylon 66 salt solution with a mass fraction of 55%; adding 100 parts of nylon 66 salt solution to the reaction kettle, then adding 0.5 parts of adipic acid and 10 parts of pretreated polyaniline. The temperature of the reaction kettle is set at 220°C, the pressure is 1.5MPA, and the pressure is maintained for 1 hour. After opening the exhaust valve to exhaust to normal pressure, add 0.5 parts of antioxidant 1098 and 0.5 parts of antioxidant 168, the vacuum pressure gauge is negative 0.1MPA, the temperature is set at 260 °C, maintain for 30 minutes, discharge and pelletize, That is, the final product is obtained.

Embodiment 2

[0029] (1) The polyaniline was soaked in 3 times the weight of tetrahydrofuran solvent for 10 minutes, filtered, and dried to obtain pretreated polyaniline for use.

[0030] (2) Dissolving nylon 66 salt in water to obtain a nylon 66 salt solution with a mass fraction of 65%; adding 100 parts of nylon 66 salt solution to the reactor, adding 1 part of adipic acid and 15 parts of pretreated polyaniline. The temperature of the reaction kettle is set at 240°C, the pressure is 2MPA, and the pressure is maintained for 2 hours. After opening the exhaust valve to exhaust to normal pressure, add 1 part of antioxidant 1098 and 1 part of antioxidant 168, the vacuum pressure gauge is minus 0.2MPA, the temperature is set at 270°C, maintain for 60 minutes, discharge and pelletize, That is, the final product is obtained.

Embodiment 3

[0032] (1) The polyaniline was soaked in 3 times the weight of tetrahydrofuran solvent for 8 minutes, filtered, and dried to obtain pretreated polyaniline for use.

[0033] (2) Nylon 66 salt was dissolved in water to obtain a nylon 66 salt solution with a mass fraction of 62%; 100 parts of nylon 66 salt solution was added to the reactor, and then 0.8 parts of adipic acid and 12 parts of pretreated polyaniline were added. The temperature of the reaction kettle was set at 230°C, the pressure was 1.8MPA, and the pressure was maintained for 1.5 hours. After opening the exhaust valve to exhaust to normal pressure, add 0.8 parts of antioxidant 1098 and 0.8 parts of antioxidant 168, the vacuum pressure gauge is negative 0.15MPA, the temperature is set at 265°C, maintain for 45 minutes, discharge and pelletize, That is, the final product is obtained.

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PUM

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Abstract

The invention discloses a nylon 66 alloy and a preparation method thereof. The nylon 66 alloy is prepared from the following components: nylon 66 salt, polyaniline, adipic acid, an antioxidant 1098 and an antioxidant 168. The preparation method of the nylon 66 alloy comprises the following steps: soaking polyaniline in tetrahydrofuran to obtain pretreated polyaniline; adding a nylon 66 saline solution into a reaction kettle, then adding adipic acid and pretreating the polyaniline, and carrying out high-temperature treatment; and then, adding the antioxidant 1098 and the antioxidant 168 for continuous reaction, and discharging and pelletizing to obtain the nylon 66 alloy. According to the preparation method disclosed by the invention, firstly, the polyaniline is pretreated by utilizing tetrahydrofuran, the surface of the polyaniline can be polished and the specific surface area of the polyaniline can be increased through the pretreatment, and in the subsequent polymerization process of the nylon 66, the polyaniline can be used as a nucleating agent for crystallization of the nylon 66, so that the nylon 66 is rapidly polymerized, and the nylon 66 alloy with excellent mechanical properties and electromagnetic shielding properties is prepared.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and in particular relates to a nylon 66 alloy and a preparation method thereof. Background technique [0002] Nylon 66 is a thermoplastic resin, white solid, density 1.14, melting point 253°C. Insoluble in common solvents, only soluble in m-cresol, etc. High mechanical strength and hardness, great rigidity. Can be used as engineering plastics. The tensile strength is 6174-8232 N / cm 2 . The bending strength is 8575-9604 N / cm 2 . The compressive strength is 4958.8-8957.2 N / cm 2 . The impact strength is 20.58-42.14 N*cm / cm 2 . The Rockwell hardness is 108-118. The heat distortion temperature is (1814.11 Pa, 18.5 kgf / cm 2 )66-86°C. Used as mechanical accessories, such as gears, lubricating bearings; instead of non-ferrous metal materials for machine casings, automotive engine blades, etc. It can also be used to make synthetic fibers. [0003] With the development of science a...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08L79/02C08K5/092C08K5/20C08K5/526
CPCC08L77/06C08L79/02C08K5/092C08K5/20C08K5/526
Inventor 杨桂生方永炜潘万华邹冲项灵芝姚晨光朱敏
Owner HEFEI GENIUS NEW MATERIALS
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