Low coefficient of thermal expansion thermoplastic resin composition, preparation method and application thereof

A low thermal expansion coefficient, thermoplastic resin technology, applied in the field of low thermal expansion coefficient thermoplastic resin composition, can solve the problems of linear expansion coefficient gap, increased weight of parts, poor toughness, etc., and achieve high flexural modulus, low linear expansion coefficient , good impact performance

Inactive Publication Date: 2013-06-05
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the increase of the glass fiber content, the density of the workpiece also increases, the weight of the workpiece increases, and the toughness deteriorates. Compared with metal parts, there is still a large gap in the linear expansion coefficient.
When thermoplastic parts with high content of glass fiber are used in conjunction with metal parts, the cracks between the parts will often swell due to the difference in thermal expansion coefficient.

Method used

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  • Low coefficient of thermal expansion thermoplastic resin composition, preparation method and application thereof
  • Low coefficient of thermal expansion thermoplastic resin composition, preparation method and application thereof
  • Low coefficient of thermal expansion thermoplastic resin composition, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Take raw material (weight part) according to following weight:

[0038] PC 540 copies,

[0039] Toughening agent MBS 55 parts,

[0040] Lubricant pentaerythritol stearate 2 parts,

[0041] Antioxidant 1076 1 part,

[0042] Antioxidant 168 2 parts,

[0043] 400 parts of continuous carbon fiber (single filament diameter: 30um);

[0044] Put the above raw materials except carbon fiber into the high-speed mixer and mix for 5 minutes, then take it out and add it to the twin-screw extruder; After melt blending, extrusion, traction, and granulation in a separate twin-screw extruder; pelletize the extruded material and dry it at 120°C for 4 hours; use an injection molding machine to inject the obtained pellets to obtain ASTM standard mechanical test specimens are used to test product-related properties, see Table 1.

[0045] The barrel temperatures of the twin-screw extruder are 210°C, 245°C, 280°C, 285°C, and 280°C; the injection molding temperatures are 220°C, 255°C, 28...

Embodiment 2

[0047] Take raw material (weight part) according to following weight:

[0048] PC 590 copies,

[0049] Toughening agent butyl acrylate-methyl methacrylate copolymer 55 parts,

[0050] Lubricant solid paraffin wax 2 parts,

[0051] Antioxidant 1076 1 part,

[0052] Antioxidant 168 2 parts,

[0053] Continuous carbon fiber (monofilament diameter is 50um) 350 parts;

[0054] Put the above raw materials except carbon fiber into the high-speed mixer and mix for 10 minutes, then take it out and add it to the twin-screw extruder; After melt blending, extrusion, traction, and granulation in a separate twin-screw extruder; pelletize the extruded material and dry it at 120°C for 4 hours; use an injection molding machine to inject the obtained pellets to obtain ASTM standard mechanical test specimens are used to test product-related properties, see Table 1.

[0055] The barrel temperatures of the twin-screw extruder are 210°C, 245°C, 280°C, 285°C, and 280°C; the injection molding tem...

Embodiment 3

[0057] Take raw material (weight part) according to following weight:

[0058] PC 640 copies,

[0059] Toughening agent ethylene-methyl methacrylate copolymer 55 parts,

[0060] Lubricant pentaerythritol stearate 2 parts,

[0061] Antioxidant 1076 1 part,

[0062] Antioxidant 168 2 parts,

[0063] Chopped carbon fiber (single filament diameter is 1um) 300 parts;

[0064] First put the above raw materials except carbon fiber into the high-speed mixer and mix for 30 minutes, then take it out and add it to the twin-screw extruder; After melt blending, extrusion, traction, and granulation in a separate twin-screw extruder; pelletize the extruded material and dry it at 120°C for 4 hours; use an injection molding machine to inject the obtained pellets to obtain ASTM standard mechanical test specimens are used to test product-related properties, see Table 1.

[0065] The barrel temperatures of the twin-screw extruder are 210°C, 245°C, 280°C, 285°C, and 280°C; the injection mold...

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Abstract

The invention belongs to the technical field of high polymer materials, and discloses low coefficient of thermal expansion thermoplastic resin composition, a preparation method and application of the low coefficient of thermal expansion thermoplastic resin composition. The resin composition is composed of, by weight, 340 to 900 parts of thermoplastic resin, 100 to 500 parts of carbon fibers, 0 to 5 parts of antioxygen, 0 to 5 parts of lubricating agent and 0 to 150 parts of flexibilizer. The preparation method comprises adding the 340 to 900 parts of the thermoplastic resin, the 0 to 5 parts of the antioxygen, 0 to 5 parts of the lubricating agent and the 0 to 150 parts of the flexibilizer to a high mixing machine to mix for 1 to 30 min, adding the mixture to a double-screw extruder, adding the 100 to 500 parts of the carbon fibers from the glass fiber feeding port or the side feeding port of the double-screw extruder to mix evenly, and carrying out extruding, dragging and prilling on mixed materials in the double-screw extruder to obtain the low coefficient of thermal expansion thermoplastic resin composition. The use of the low coefficient of thermal expansion thermoplastic resin composition applied to the fittings of a metal piece is provided. The thermoplastic resin is high in flexural modulus, tensile strength and impact strength, and low in linear expansion coefficient.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a low thermal expansion coefficient thermoplastic resin composition, a preparation method and an application thereof. Background technique [0002] In today's society, the speed of material replacement is further accelerated. In many application fields, products need to have the characteristics of light weight, high specific strength, and low cost. In the fields of automobiles, electronics, etc., some metal materials have been replaced by thermoplastic resin compositions, and the replacement speed is getting faster and faster. [0003] However, some parts of some products must also use metal materials for various reasons. During the combined use of thermoplastic resin composite objects and metal parts, due to the high thermal expansion coefficient of thermoplastic resin, which is 5-10 times the linear expansion coefficient of metal, the gap between the thermal expansion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/00C08L67/00C08L23/00C08L59/02C08L71/12C08L55/02C08L51/00C08L77/02C08L77/06C08L69/00C08L67/02C08L23/06C08L23/12C08K13/04C08K7/06B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/40B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 高军王华孙利明
Owner HEFEI GENIUS NEW MATERIALS
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