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High-strength high-impact-resistance low-content alloy material and preparation method thereof

A technology of high impact resistance and alloy materials, which is applied in the field of polymer materials, can solve the problems of reducing interfacial tension, interfacial adhesion, uncontrollable grafting reaction, and low initiation efficiency, so as to avoid polymer crosslinking or degradation, and the reaction can be Strong controllability and excellent physical and mechanical properties

Active Publication Date: 2014-08-20
句容市育达实业投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

An economical and feasible method in industrial production is to generate graft copolymers in situ during the extrusion process by adding reactive compatibilizers, so that it can stabilize the phase size and reduce interfacial tension to achieve enhanced interfacial cohesion. The grafting reaction of reactive compatibilizers generally requires the use of initiators to initiate grafting, and there will be problems such as low initiation efficiency and uncontrollable grafting reactions leading to different degrees of crosslinking.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Preparation of high-strength, high-impact, low-content PA6 / LLDPE alloy material

[0018] Pre-irradiate LLDPE in advance: put LLDPE into a moderately sized cloth bag, the thickness of which is 3mm after being tiled, use an electron accelerator as the irradiation source, and use β-rays to pre-irradiate linear low-density polyethylene. The irradiation dose range is 2KGy, and the pre-irradiation time is 60s; 90 parts by weight of pre-irradiated LLDPE, 10 parts by weight of PA6 and 3 parts by weight of MAH dried in a vacuum oven at 90°C for 8 hours 3 parts by weight of montmorillonite are added to the high-speed mixer and mixed evenly, and the mixed material is put into the hopper of the twin-screw extruder. The rotation speed is 15rpm / min; the diameter of the extruder is 65, the aspect ratio is 36:1, and the temperature of each section from the feeding port to the die temperature is: 180, 180, 190, 190, 200, 210, 220, 220, 225, 225 ° C reaction material is extru...

Embodiment 2

[0020] Example 2: Preparation of high-strength, high-impact, low-content PA6 / LLDPE alloy material

[0021] Pre-irradiate linear low-density polyethylene in advance: put LLDPE into a moderately sized cloth bag, the thickness of which is 10mm after being tiled, use an electron accelerator as the irradiation source, and pre-irradiate LLDPE with β-rays. The irradiation dose range is 50KGy, and the pre-irradiation time is 5s; 60 parts by weight of LLDPE after pre-irradiation treatment, 40 parts by weight of PA6 and 6 parts by weight of MAH dried in a vacuum oven at 90°C for 12 hours 6 parts by weight of montmorillonite are added to the high-speed mixer and mixed evenly, and the mixed material is put into the hopper of the twin-screw extruder. The rotation speed is 50rpm / min; the diameter of the extruder is 65, the aspect ratio is 40:1, and the temperature of each section from the feeding port to the die temperature is: 180, 180, 190, 190, 200, 210, 220, 220, 225, 225°C, the reacti...

Embodiment 3

[0023] Example 3: Preparation of high-strength, high-impact, low-content PA6 / LLDPE alloy material

[0024] Pre-irradiate LLDPE in advance: put LLDPE into a moderately sized cloth bag, the thickness of which is 6mm after being tiled, use an electron accelerator as the irradiation source, and pre-irradiate LLDPE with β-rays, the pre-irradiation dose range 26KGy, the pre-irradiation time is 32s; 75 parts by weight of LLDPE treated with pre-irradiation and 25 parts by weight of PA6, 5 parts by weight of MAH, montmorillonite and 2 parts by weight are added to a high-speed mixer and mixed evenly, and the mixed material is put into the hopper of a twin-screw extruder. min; the diameter of the extruder is 65, the ratio of length to diameter is 44:1, and the temperature of each section from the feed port to the die temperature is: 180, 180, 190, 190, 200, 210, 220, 220, 225, 225°C , the host speed is 150r / min, and the reaction material is extruded, drawn, cooled, and granulated by a t...

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Abstract

The invention discloses a high-strength high-impact-resistance low-content PA6 / LLDPE (polyamide 6 / linear low-density polyethylene) alloy material which comprises the following components in parts by weight: 60-90 parts of LLDPE, 10-40 parts of PA6, 2-8 parts of maleic anhydride (MAH) and 2-10 parts of montmorillonite. The invention also discloses a preparation method of the high-strength high-impact-resistance low-content PA6 / LLDPE alloy material. The two incompatible resin raw materials PA6 and LLDPE can be well fused together; the introduction of the LLDPE obviously improves the low-temperature impact resistance of the PA6; the LLDPE in the molten state and MAH are subjected to grafting reaction under the action of pre-irradiation to enhance the compatibility between the LLDPE and PA6; and the montmorillonite has the function of intercalation at the LLDPE / PA6 phase interface, thereby obtaining the bicontinuous-structure PA6 / LLDPE alloy material.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a high-strength, high-impact, low-content alloy material and a preparation method thereof. Background technique [0002] Linear low-density polyethylene (LLDPE) has excellent low-temperature impact and environmental stress cracking resistance; however, it also has problems such as low strength and low rigidity. If LLDPE can be blended and reinforced with engineering plastic PA6, high-performance alloy materials can be formed. Since PA6 and LLDPE are not directly compatible, it is necessary to add a compatibilizer to improve the compatibility of the two. The introduction of polyolefin can improve the impact performance of polyamide (PA), and a small amount of PA can also improve the gas barrier property of polyolefin and solvent resistance. However, since PA and polyolefin are thermodynamically incompatible systems, the stress in their blends cannot be effe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F255/02C08K3/34C08L51/06C08L77/02C08J3/28B29C47/92B29C48/92
CPCB29B7/7461B29B9/12B29B7/46B29B9/06B29C47/92B29B7/72B29C48/40B29C48/92B29C2948/9259B29C2948/92704B29C2948/92895
Inventor 鲁平才徐剑赵银主
Owner 句容市育达实业投资有限公司
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