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Polyamide (PA) composition

A polyamide composition and polyamide technology, applied in the field of polyamide, can solve the problems that the strength and toughness cannot be improved at the same time

Inactive Publication Date: 2014-02-05
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the strength and toughness of existing PA / ABS alloy products cannot be improved simultaneously, and to provide a polyamide composition

Method used

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  • Polyamide (PA) composition

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Effect test

preparation example Construction

[0028] The preparation method of the functionalized ABS toughening agent of the present invention: first, pre-emulsify monomer styrene (St), acrylonitrile (AN) and glycidyl methacrylate (GMA), the specific steps are: Add St, AN and GMA into the monomer bottle, then add rosin soap and distilled water into the monomer bottle, seal it with a rubber stopper and shake the monomer bottle until the liquid in the bottle is in the form of a non-layered emulsion, that is, the monomer For the mixed liquid, the volume ml of the rosin soap liquid: the mass g of styrene is 10: (17.25-21.75), and the mass ratio of distilled water to styrene is 10: (17.25-21.75).

[0029] In the present invention, polybutadiene latex (solid content: 57.32%) is first put into a three-necked bottle, diluted with distilled water to a solid content of 35.0%, and continuously stirred under the condition of nitrogen protection and 62-67°C, in order to better disperse Initiation, the above-mentioned monomer mixed so...

Embodiment 1

[0034] 60 parts by weight of the dried PA6 granular material and 10 parts by weight of the dry functionalized ABS toughening agent powdery material are placed in a high mixer and mixed, wherein the core-shell ratio of the functionalized ABS modifier is 70 / 30, The rubber phase is PB, the shell layer is a copolymer of St, AN and GMA, and its weight ratio is 73 / 24 / 3. The premix and 30 parts by weight of glass fiber are added to the co-rotating twin-screw extruder for reaction to obtain a polyamide composition. The screw speed is 450 rpm. From the feed port to the die head The reaction temperatures of each reaction section are 200°C, 215°C, 245°C, 255°C, 250°C, 260°C, 260°C, 260°C, and 255°C.

[0035] Tensile and impact samples were made by injection molding method at 240-255 °C, and the test results of their mechanical properties are shown in Table 1.

Embodiment 2

[0037] According to the steps and conditions of Example 1, only the parts by weight of PA6 were changed to 57, the parts by weight of the functionalized ABS toughening agent were 8, and the parts by weight of glass fibers were 35. The properties are shown in Table 1.

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Abstract

The invention provides a polyamide (PA) composition, belonging to the field of PA. The PA composition is used for solving the problems of the existing PA / ABS (Acrylonitrile-Butadiene-Styrene copolymer) alloy products that strength and toughness can not be improved simultaneously. The PA composition contains the following ingredients in percentage by weight: 55-65% of PA, 5-10% of functionalized ABS toughening agent and 25-40% of glass fibers. According to the PA composition, in the functionalized ABS toughening agent, a rubber phase and the glass fibers are dispersed into PA matrix resin, and GMA (Glycidyl Methacrylate) in functionalized ABS can react with terminal groups in PA, so that the interfacial adhesion force is increased, the interfacial adhesion for the glass fibers and a PA matrix is promoted, and the interfacial adhesion force of the glass fibers is increased, thus the prepared PA composition has relatively high strength and toughness. The PA composition provided by the invention has the advantages that the impact strength is not lower than 120J / m, the elongation at break is not lower than 3%, the tensile strength is not lower than 85MPa, and the bending strength is not lower than 5.5GPa.

Description

technical field [0001] The invention belongs to the field of polyamides, in particular to a polyamide composition. technical background [0002] Polyamide (PA) is a class of engineering plastics with excellent performance, which has good mechanical properties and heat resistance stability, but the toughness and impact resistance of PA have a great dependence on temperature and moisture absorption. When the amount is low, the impact strength is low, which greatly limits its use, and PA alloy materials are more suitable for high performance requirements. The blending modification of PA and ABS is one of the effective ways to overcome the above-mentioned defects of PA. The preparation of PA / ABS alloys had patent reports as early as the 1960s, but it was not until the 1980s that the Elemid series alloys researched and developed by the American Borg Warner Company were successfully applied to the outer panels of automobiles, and the industrial development and application of this...

Claims

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Application Information

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IPC IPC(8): C08L77/00C08L77/02C08L77/06C08L51/04C08K7/14
CPCC08L77/02C08L77/06
Inventor 郐羽褚明利谭志勇孙树林
Owner CHANGCHUN UNIV OF TECH
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