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High-content glass fibre-enhanced nylon 66 composite material and preparation method thereof

A high-content glass fiber and composite material technology, applied in the field of polymer materials, can solve problems such as difficult wetting, difficult fiber chemical bonding, and weak interface bonding of composite materials, so as to achieve good aging protection, improve thermal oxygen aging performance, The effect of improving the interfacial adhesion performance

Inactive Publication Date: 2018-06-29
HEILONGJIANG XINDA ENTERPRISE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the interface bonding is not good, the glass fiber will not play a reinforcing role. Because the modulus difference between the glass fiber and the nylon matrix is ​​large, the two are not easy to wet, and the nylon matrix itself lacks reactive active functional groups, so it is difficult to Produces good chemical bonds with fibers, so the interfacial bonding of composite materials is weak

Method used

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  • High-content glass fibre-enhanced nylon 66 composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The high content glass fiber reinforced nylon 66 composite material in the present embodiment comprises the component of following mass percent content, nylon 66: 31.9%, non-alkali glass fiber: 62%, compatibilizer: 5%, primary antioxidant 1076: 0.3%, auxiliary antioxidant 168: 0.3%, lubricant calcium stearate: 0.5%, among them, the surface of the alkali-free glass fiber is coated with 0.3% carbon nanotube reinforcement layer, and the length of the alkali-free glass fiber is 1.5 -2.0mm, the diameter is 9-11μm, the molecular weight of nylon 66 is 17000-17500;

[0025] Add the above nylon 66, compatibilizer, main antioxidant, auxiliary antioxidant and lubricant into the high-speed mixer and mix evenly. The speed of the high-speed mixer is 350rpm / min. After mixing for 5 minutes, add the materials to the The main feeding hopper of the screw extruder, and the alkali-free glass fiber is added to the side feeding hopper of the twin-screw extruder at the same time, extruded and ...

Embodiment 2

[0027]The high content glass fiber reinforced nylon 66 composite material in the present embodiment comprises the component of following mass percentage content, nylon 66: 32%, alkali-free glass fiber: 61.5%, compatibilizer: 4.8%, main antioxidant 1098: 0.4%, auxiliary antioxidant 168: 0.4%, lubricant silicone: 0.9%, among them, the surface of alkali-free glass fiber is covered with 1.0% carbon nanotube reinforcement layer, and the length of alkali-free glass fiber is 2-2.5 mm, the diameter is 10-11μm, and the molecular weight of nylon 66 is 17300-17700;

[0028] Add the above-mentioned nylon 66, compatibilizer, main antioxidant, auxiliary antioxidant and lubricant into the high-speed mixer and mix evenly. The speed of the high-speed mixer is 320rpm / min. After mixing for 6 minutes, add the materials The main feeding hopper of the screw extruder, and the alkali-free glass fiber is added to the side feeding hopper of the twin-screw extruder at the same time, extruded and granula...

Embodiment 3

[0030] The high-content glass fiber reinforced nylon 66 composite material in the present embodiment comprises the component of following mass percent content, nylon 66: 33%, alkali-free glass fiber: 61%, compatibilizer: 4.5%, main antioxidant 1010: 0.3%, auxiliary antioxidant 168: 0.4%, lubricant TAF: 0.8%, among them, the surface of alkali-free glass fiber is covered with 2% carbon nanotube reinforcement layer, and the length of alkali-free glass fiber is 2.5-3.0mm , with a diameter of 10-12 μm and a molecular weight of nylon 66 of 17500-18000;

[0031] Add the above nylon 66, compatibilizer, main antioxidant, auxiliary antioxidant and lubricant into the high-speed mixer and mix evenly. The speed of the high-speed mixer is 360rpm / min. After mixing for 7 minutes, add the materials to the The main feeding hopper of the screw extruder, and the alkali-free glass fiber is added to the side feeding hopper of the twin-screw extruder at the same time, extruded and granulated, and th...

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Abstract

The invention relates to a high-content glass fibre-enhanced nylon 66 composite material and a preparation method thereof, and belongs to the field of high polymer materials. The composite material isprepared from the following components in percentage by mass: 31.9 to 38 percent of nylon 66, 58 to 62 percent of alkaline-free glass fibres, 2 to 5 percent of a compatilizer, 0.3 to 0.5 percent of amain antioxidant, 0.3 to 0.5 percent of an auxiliary antioxidant and 0.5 to 1.0 percent of a lubricating agent, wherein the surfaces of the alkaline-free glass fibres are coated with an enhancement layer; the enhancement layer is made of carbon nano-tubes or silicon carbide nano-tubes which are extruded and granulated by using a twin-screw extruder. The composite material provided by the invention is high in glass fibre content; the mechanical properties and the physical properties of the composite material are improved; moreover, the surfaces of the alkaline-free glass fibres are coated withthe nano-tubes; the compatibility of the alkaline-free glass fibres and the nylon 66 is increased by selecting suitable lengths and diameters of the glass fibres and the molecular weight of the nylon66; the defect that the appearance of the material becomes poor along with the increment of the content of the glass fibres filled in the nylon in the past is overcome.

Description

technical field [0001] The invention relates to a polymer material, in particular to a high-content glass fiber reinforced nylon 66 composite material and a preparation method thereof. Background technique [0002] Nylon 66, that is, polyhexamethylenediamine, the molecular formula is -[NH (CH 2 ) 6 NHOC (CH 2 ) 4 CO] n-, abbreviated as PA66, is one of the earliest developed, largest and most widely used varieties in the polyamide family. Nylon 66 is a colorless transparent semi-crystalline thermoplastic polymer. Its macromolecular main chain contains phthalamide functional groups, which can form hydrogen bonds. It is a polymorphic semi-crystalline polymer with excellent mechanical properties and wear resistance. , self-lubricating performance, corrosion resistance, and good formability, but high water absorption, low modulus, poor dimensional stability and electrical properties, heat resistance, light resistance, low temperature impact resistance, and dyeability are also...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L83/04C08K13/06C08K9/10C08K7/14C08K7/24C08K7/26C08K3/04C08K3/34C08K5/098
CPCC08K2201/011C08L77/06C08L2201/08C08L83/04C08K13/06C08K9/10C08K7/14C08K7/24C08K7/26C08K3/04C08K3/34C08K5/098
Inventor 李鸣珏崔成杰谢众
Owner HEILONGJIANG XINDA ENTERPRISE GRP
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