Low-warpage carbon-fiber-reinforced polyethylene terephthalate (PET)/polyester alloy and preparation process thereof

A technology of polyester alloy and low warpage, which is applied in the field of low warpage carbon fiber reinforced PET/polyester alloy and its preparation, which can solve the problems of insufficient mechanical properties and long molding cycle of alloy materials, and achieve shortened molding cycle and good mechanical properties. performance, improved appearance

Inactive Publication Date: 2013-11-06
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a low warpage carbon fiber reinforced PET / polyester alloy in order to solve the above-mentioned technical problems such as long molding cycle and insufficient mechanical properties of the alloy material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A low warpage carbon fiber reinforced PET / polyester alloy, calculated by weight percentage, the composition and content of its raw materials are as follows:

[0053]PET 58.8%

[0054] Polyester 25.2%

[0055] Polyester nucleating agent 1.5%

[0056] Carbon Fiber 10%

[0057] Compatibilizer 3%

[0058] Antioxidant 1%

[0059] Lubricant 0.5%;

[0060] Described PET is polyethylene terephthalate, and viscosity is 0.8-0.9dl / g;

[0061] Described polyester is polyethylene 2,6-naphthalate;

[0062] The polyester nucleating agent is hydrated magnesium aluminum silicate and organic montmorillonite, calculated by mass ratio, that is, a mixture of hydrated magnesium aluminum silicate:organic montmorillonite in a ratio of 1:2;

[0063] The carbon fiber is a high-strength carbon fiber, its tensile strength is 3000-4000MPa, and the ratio of its tensile strength to stiffness is 1.5-2.0%;

[0064] The compatibilizer is AX8900;

[0065] Described antioxidant is antioxidant 168...

Embodiment 2

[0072] A low warpage carbon fiber reinforced PET / polyester alloy, calculated by weight percentage, the composition and content of its raw materials are as follows:

[0073] PET 62.4%

[0074] Polyester 15.6%

[0075] Polyester nucleating agent 0.5%

[0076] Carbon Fiber 15%

[0077] Compatibilizer 5%

[0078] Antioxidant 1%

[0079] Lubricant 0.5%;

[0080] Described PET is polyethylene terephthalate, and viscosity is 0.8-0.9dl / g;

[0081] Described polyester is polytrimethylene terephthalate;

[0082] Described polyester nucleating agent is organic montmorillonite;

[0083] The carbon fiber is a high-strength carbon fiber, its tensile strength is 3000-4000MPa, and the ratio of its tensile strength to stiffness is 1.5-2.0%;

[0084] The compatibilizer is AX8900;

[0085] Described antioxidant is antioxidant 1010;

[0086] Described lubricant is polyethylene wax.

[0087] The preparation method of above-mentioned a kind of low warpage carbon fiber reinforced PET / poly...

Embodiment 3

[0092] A low warpage carbon fiber reinforced PET / polyester alloy, calculated by weight percentage, the composition and content of its raw materials are as follows:

[0093] PET 63.9%

[0094] Polyester 7.1%

[0095] Polyester nucleating agent 0.5%

[0096] Carbon Fiber 20%

[0097] Compatibilizer 7%

[0098] Antioxidant 1%

[0099] Lubricant 0.5%;

[0100] Described PET is polyethylene terephthalate, and viscosity is 0.8-0.9dl / g;

[0101] Described polyester is polytrimethylene terephthalate;

[0102] Described polyester nucleating agent is hydrated magnesium aluminum silicate;

[0103] The carbon fiber is a high-strength carbon fiber, its tensile strength is 3000-4000MPa, and the ratio of its tensile strength to stiffness is 1.5-2.0%;

[0104] The compatibilizer is AX8900;

[0105] Described antioxidant is antioxidant 1010;

[0106] The lubricant is a mixture of polyethylene wax and polypropylene wax in a mass ratio, that is, polyethylene wax: polypropylene wax in a...

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Abstract

The invention discloses a low-warpage carbon-fiber-reinforced PET/polyester alloy and a preparation process thereof. The PET/polyester alloy comprises, by weight, 40-65% of PET, 7-30% of polyester, 0.5-1.5% of a polyester nucleating agent, 10-40% of carbon fibers, 3-10% of a compatilizer, 0.5-1% of an antioxidant and 0.5-1% of a lubricating agent. The preparation process comprises the steps of firstly, placing the PET, the polyester, the polyester nucleating agent, the compatilizer, the antioxidant and the lubricating agent into a highly mixing machine for mixing for 3-5min, then adding from a first section barrel of a double-screw extruder, adding the carbon fibers from a fourth section barrel of the double-screw extruder, controlling the revolving speed of the double-screw extruder to be 35-40Hz, and performing extruding granulating at the temperature of 240-250DEG C, so that the low-warpage carbon-fiber-reinforced PET/polyester alloy which is high in mechanical property, short in molding cycle and attractive in product appearance is obtained.

Description

technical field [0001] The invention relates to a low warpage carbon fiber reinforced PET / polyester alloy and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] Polyethylene terephthalate (hereinafter referred to as PET) has excellent mechanical properties, heat resistance, electrical properties and chemical stability, and is a cheap thermoplastic engineering plastic. However, due to its easy warping and long molding cycle, its application range is largely limited. In recent years, researchers at home and abroad have done a lot of research on PET blending modification, and many alloyed products have been sold in the market, but this type of alloy is still affected by the compatibility between resins, and its mechanical properties are poor, while PET / Polyester alloys do not have such problems, and the cost is lower. Therefore, PET / polyester alloys have become a new development hotspot. [0003] However, PET, polyethyl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L23/08C08K13/04C08K7/06C08K3/34
Inventor 徐群杰王瑞元陈晓东付杰辉
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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