Reinforced and toughened ultra-low temperature resistant nylon composite material and preparation method and application thereof

A nylon composite material, strengthening and toughening technology, applied in the field of polymer materials, can solve the problems of decreased compatibility, decreased toughness, and high glass transition temperature, and achieves prevention of poor interfacial compatibility, strong interfacial bonding, Evenly dispersed effect

Active Publication Date: 2019-11-12
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] From the analysis of the existing toughening system, it can be found that the main reasons for the poor ultra-low temperature resistance of the current toughening system are: 1) the glass transition temperature of the olefin elastomer toughening agent itself is high, and the ultra-low temperature resistance is poor; 2) the toughening agent The interface with the matrix resin is poorly bonded. Although the elastomer has been grafted with maleic anhydride to improve the compatibility with nylon, the combination of the two is still only physically compatible, and the ultra-low temperature environment will reduce the compatibility, resu...

Method used

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  • Reinforced and toughened ultra-low temperature resistant nylon composite material and preparation method and application thereof
  • Reinforced and toughened ultra-low temperature resistant nylon composite material and preparation method and application thereof
  • Reinforced and toughened ultra-low temperature resistant nylon composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Dry nylon 66 and nylon 6 resins in a vacuum oven at 90°C for 6 to 12 hours; add the silane coupling agent γ-aminopropyltriethoxysilane to the mixed solvent of ethanol / water (weight ratio 95:5) to obtain A silane coupling agent solution, soaking the glass fiber in the solution and then drying to obtain the modified glass fiber.

[0054] The dried nylon 66 and nylon 6, modified glass fiber, toughening system (amino polydimethylsiloxane: terminated epoxy dimethyl siloxane: acrylate-organic silicon copolymer toughened Agent S2001=2:2:6) and oleic acid amide are added into the high-speed mixer according to the mass ratio of 60:6:24:8:2, mixed for 3 to 5 minutes, and the obtained mixed resin is passed through the twin-screw extruder, Under the conditions of a temperature of 280°C and a screw speed of 200r / min, nylon composite materials were obtained by melt extrusion, traction, cooling and granulation.

Embodiment 2

[0056] Dry nylon 66 and nylon 6 resins in a vacuum oven at 90°C for 6 to 12 hours; add the silane coupling agent glycidyl ether propyl trimethoxysilane to the mixed solvent of ethanol / water (95:5 by weight) The silane coupling agent solution is obtained, the glass fiber is soaked in the solution and then dried to obtain the modified glass fiber.

[0057] The dried nylon 66 and nylon 6, modified glass fiber, toughening system (amino polydimethylsiloxane: terminated epoxy dimethyl siloxane: acrylate-organic silicon copolymer toughened Agent S2001=1:1:8) and erucamide were added into the high-speed mixer according to the mass parts of 65:5:20:8:2, mixed for 3 to 5 minutes, and the obtained mixed resin was passed through the twin-screw extruder, Under the conditions of a temperature of 300°C and a screw speed of 250r / min, nylon composite materials were obtained by melt extrusion, traction, cooling, and granulation.

Embodiment 3

[0059] Dry nylon 66 and nylon 6 resins in a vacuum oven at 90°C for 6 to 12 hours; add the silane coupling agent γ-aminopropyltrimethoxysilane to the mixed solvent of ethanol / water (weight ratio 95:5) to obtain A silane coupling agent solution, soaking the glass fiber in the solution and then drying to obtain the modified glass fiber.

[0060] The dried nylon 66 and nylon 6, modified glass fiber, toughening system (amino polydimethylsiloxane: terminated epoxy dimethyl siloxane: acrylate-organic silicon copolymer toughened Agent S2001=3:3:4) and stearic acid amide are added into the high-speed mixer according to the mass parts of 50:10:30:9:1, mixed for 3 to 5 minutes, and the obtained mixed resin is passed through the twin-screw extruder , under the conditions of a temperature of 260°C and a screw speed of 100r / min, the nylon composite material was obtained by melt extrusion, traction, cooling, and granulation.

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Abstract

The invention belongs to the technical field of high polymer materials, and particularly discloses a reinforced and toughened ultra-low temperature resistant nylon composite material. The reinforced and toughened ultra-low temperature resistant nylon composite material is prepared from the components: 55-75 parts of nylon resin, 15-30 parts of glass fiber, 5-12 parts of a toughening agent and 0.5-2 parts of a lubricating agent, the toughening agent is a mixture of amino-terminated polydimethylsiloxane, epoxy-terminated polydimethylsiloxane and an organosilicone elastomer toughening agent; andthe glass fiber is the glass fiber modified by a silane coupling agent containing an amino group or an epoxy group. The invention further discloses a preparation method of the reinforced and toughenedultra-low temperature resistant nylon composite material, and application to preparation of high-speed rail fittings in areas with extremely-cold climate and the fields of electronic engineering, communication and aerospace in the ultra-low temperature environments, the reinforced and toughened ultra-low temperature resistant nylon composite material is high in strength and good in toughness, theultra-low temperature resistant performance is especially excellent, the preparation method is simple, the production efficiency is high, and the reinforced and toughened ultra-low temperature resistant nylon composite material has the universality, and is suitable for large-scale production application.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a reinforced and toughened ultra-low temperature-resistant nylon composite material and a preparation method and application thereof. Background technique [0002] Nylon material, as the earliest developed and most widely used engineering plastic, not only has the advantages of high mechanical strength, good heat resistance, excellent wear resistance, etc., but also has excellent processing flow properties. After strengthening and toughening modification, It has a wide range of applications in the fields of automobiles, electrical appliances, and railway equipment. [0003] In recent years, my country's high-speed railway has developed rapidly, which provides a new opportunity for the application of nylon composite materials. In high-speed railways, nylon composite materials are used to prepare baffle seats, rail insulating gauge blocks and plastic sleeves ...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08L77/02C08L83/08C08L83/06C08L51/00C08K9/06
CPCC08L77/06C08L2205/02C08L2205/035C08L2207/53C08L77/02C08L83/08C08L83/06C08L51/003C08K9/06C08K7/14
Inventor 杨晋涛何晓敏钟明强陈枫范萍
Owner ZHEJIANG UNIV OF TECH
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