Heat resistant nylon material containing thormotropic liquid crystal polymer and its preparation method

A thermotropic liquid crystal and polymer technology, applied in the field of heat-resistant nylon materials, can solve the problems of easy phase separation, compatibility difference, and deterioration, etc., to reduce melt viscosity, increase melt flow rate, and improve processing performance effect

Inactive Publication Date: 2007-02-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of mixing and modifying thermotropic liquid crystal polymers and thermoplastic engineering plastics, due to the difference in compatibility between the two, phase separation is prone to occur, so that the performance of thermoplastic engineering plastics is not only not improved, but deteriorated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In parts by weight, take 70 parts of nylon 6 slices (engineering plastic grade nylon 6 slices produced by Guangdong Xinhui Meida Co., Ltd.), 25 parts of Vectra A type thermotropic liquid crystal polymers (produced by Goodfellow Company in the United States), 4.5 parts A-1100 type coupling agent (produced by U.S. Union Carbon Corporation), 0.5 part of Luchemao-R type hindered phenolic antioxidant (produced by U.S. Great Lakes Corporation); Extrusion, traction, granulation were carried out in the extruder at 250°C, and samples were made by injection molding for performance testing. The heat resistance of the sample is tested according to the method of "GB / T1633 Determination of Vicat Softening Temperature (VST) of Thermoplastics", and the Vicat heat resistance temperature is 230°C; the increase rate of the melt flow rate of the sample is according to "GB3682-83 Thermoplastics Melt flow rate test method "test, the melt flow rate increase rate of the sample is 13%.

Embodiment 2

[0025] In parts by weight, weigh 60 parts of nylon 6 slices (engineering plastic grade nylon 6 slices produced by Guangdong Xinhui Meida Co., Ltd.), 35 parts of Zenite type thermotropic liquid crystal polymers (produced by U.S. Dupont), 4.5 parts of Fusabond Type coupling agent (produced by U.S. Dupont Company), 0.5 parts of Luchemao-R type hindered phenol antioxidant (produced by U.S. Great Lakes Company); under stirring conditions, mix the above components evenly, and then put the resulting mixture in the extruder Extrude, draw, pelletize at 260°C, and make samples by injection molding for performance testing. The heat resistance of the sample is tested according to the method of "GB / T1633 Determination of Vicat Softening Temperature (VST) of Thermoplastics", and the Vicat heat resistance temperature is 230°C; the increase rate of the melt flow rate of the sample is according to "GB3682-83 Thermoplastics Melt flow rate test method "test, the melt flow rate of the sample incr...

Embodiment 3

[0027] In parts by weight, weigh 65 parts of nylon 6 slices (engineering plastic grade nylon 6 slices produced by Guangdong Xinhui Meida Co., Ltd.), 30 parts of Vectra A-type thermotropic liquid crystal polymers (produced by Goodfellow Company in the United States), 4.5 parts Fusabond type coupling agent (produced by U.S. Dupont Company), 0.5 part of Luchemao-R type hindered phenolic antioxidant (produced by U.S. Great Lakes Company); Extrusion, traction, granulation were carried out at 260°C, and samples were made by injection molding for performance testing. The heat resistance of the sample is tested according to the method of "GB / T1633 Determination of Vicat Softening Temperature (VST) of Thermoplastics", and the Vicat heat resistance temperature is 230°C; the increase rate of the melt flow rate of the sample is according to "GB3682-83 Thermoplastics Melt flow rate test method "test, the melt flow rate of the sample increased by 15%.

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Abstract

The present invention discloses one kind of heat resistant nylon material containing thermal liquid crystal polymer. The heat resistant nylon material consists of nylon-6 slice 60-70 wt%, thermal liquid crystal polymer 25-35 wt%, cross-linking agent 4.5 wt% and antioxidant 0.5 wt%. Its preparation process includes the steps of: mixing all the components via stirring, extruding at 250 deg.c or 260 deg.c, drawing, pelletizing and injection molding. The heat resistant nylon material has Vicat softening point up to 230 deg.c and high melt flow rate, and may be used in making different kinds of heat resistant nylon parts.

Description

technical field [0001] The invention belongs to the field of heat-resistant nylon materials, in particular to a heat-resistant nylon material containing a thermotropic liquid crystal polymer and a preparation method thereof. Background technique [0002] Thermotropic liquid crystal polymers appear in a liquid crystal state because heating destroys the crystalline structure of polymer segments and makes the amorphous structure enter a molten state and form a certain orderly arrangement. It is a new type of high-performance polymer material, which is characterized by high modulus, high strength, unique easy flowability in liquid crystal state, excellent thermal stability and dimensional stability, chemical resistance and weather resistance Excellent comprehensive properties such as high resistance to solvents, low coefficient of linear expansion and density. Using the characteristics of thermotropic liquid crystal polymers, blending and modifying them with thermoplastic engin...

Claims

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Application Information

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IPC IPC(8): C08L77/02C09K19/38
Inventor 赵建青吴水珠叶华刘述梅
Owner SOUTH CHINA UNIV OF TECH
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