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Preparation method for in situ filled semi-aromatic polyamide composite material

A technology of semi-aromatic polyamide and composite materials, which is applied in the field of preparation of in-situ filled semi-aromatic polyamide composite materials, can solve the problems of complex resin synthesis process and high energy consumption, and achieve rich variety, high mechanical strength and experimental repeatability Good results

Inactive Publication Date: 2012-11-21
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, functionalized semi-aromatic polyamide composite materials are mainly produced by extruding and granulating pure resin and fillers, but the resin synthesis process is complicated, and the resin synthesis and blending process requires two granulations, which requires high energy consumption.

Method used

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  • Preparation method for in situ filled semi-aromatic polyamide composite material
  • Preparation method for in situ filled semi-aromatic polyamide composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Put 5000g of semi-aromatic polyamide prepolymer (prepared by the weight ratio of terephthalic acid: adipic acid: hexamethylenediamine=83:73:116), 50g of phosphoric acid, 5000g of calcium carbonate and 10g of benzoic acid into the reaction extruder , Reactive extrusion at a temperature of 315 ° C, a screw speed of 130 rpm and a vacuum of 0.07 MPa; the extrudate was drawn, cooled, pelletized and dried to obtain an in-situ filled semi-aromatic polyamide composite material with a yield of 93%. Strength 97MPa, bending strength 219MPa, unnotched impact strength 54kJ / m 2 .

Embodiment 2

[0031] Add 1000g of semi-aromatic polyamide prepolymer (prepared by weight ratio of hexamethylenediamine terephthalate: caprolactam = 141:59), 1g of pyrophosphate, 10g of silicon dioxide and 1g of p-toluic acid for reaction extrusion Machine, reaction extrusion at a temperature of 330 ° C, a screw speed of 20 rpm and a vacuum of 0.08 MPa; the extrudate was drawn, cooled, pelletized and dried to obtain an in-situ filled semi-aromatic polyamide composite material with a yield of 95%. Tensile strength 82MPa, bending strength 180MPa, unnotched impact strength 67kJ / m 2 .

Embodiment 3

[0033] Semi-aromatic polyamide prepolymer (prepared by weight ratio of 4,4'-(4-thioetherbenzoic acid)-triphenylphosphine oxide:decanediamine:cycloenantholactam=582:172:46) 4000g , 35g of polyphosphoric acid, 15g of silicon dioxide, 70g of titanium dioxide and 7g of m-toluic acid are added to the reaction extruder, and the reaction is extruded at a temperature of 290°C, a screw speed of 200rpm and a vacuum of 0.09MPa; the extrudate is drawn, After cooling, pelletizing and drying, an in-situ filled semi-aromatic polyamide composite material was obtained, with a yield of 92%, a tensile strength of 88MPa, a flexural strength of 191MPa, and an unnotched impact strength of 55kJ / m 2 .

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Abstract

The invention discloses a preparation method for an in situ filled semi-aromatic polyamide composite material. The method is characterized by comprising the following steps: adding 1000 to 5000 parts by weight of a semi-aromatic polyamide prepolymer, 1 to 50 parts by weight of a catalyst, 10 to 5000 parts by weight of a filling material and 1 to 10 parts by weight of a molecular weight regulator into a reaction extruder; carrying out reactive extrusion under the conditions of a temperature of 290 to 330 DEG C, a screw rotation speed of 20 to 200 rpm and a vacuum degree of 0.04 to 0.09 MPa; and then carrying out traction, cooling, granulation and drying on obtained extrudate so as to obtain the in situ filled semi-aromatic polyamide composite material.

Description

technical field [0001] The invention relates to a preparation method of an in-situ filled semi-aromatic polyamide composite material, which belongs to the technical field of polymer materials. Background technique [0002] Semi-aromatic polyamide composite materials have good heat resistance and mechanical properties, and are widely used in the fields of electronic appliances and automobile industries. At the same time, in order to expand its application in electrical conductivity, thermal conductivity and wear resistance, it is usually necessary to add fillers to semi-aromatic polyamide resins to obtain functional composite materials. [0003] At present, functionalized semi-aromatic polyamide composites are mainly produced by extruding and granulating pure resin and fillers, but the resin synthesis process is complex, and the resin synthesis and blending process requires two granulations, which consumes a lot of energy. The previous work of the present invention has publi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/00C08L77/06C08K3/26C08K3/36C08K3/22C08K3/34C08K7/20C08K3/04C08K7/28C08K7/00C08K3/38C08K3/32C08K3/30C08K5/3492C08G69/28C08G69/36C08G69/42
Inventor 王孝军瞿兰杨杰张美林龙盛如张刚
Owner SICHUAN UNIV
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