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Method for preparing polymer-matrix composite material by in-situ bubble stretching one-step defoaming method

A composite material and polymer technology, applied in the field of polymer-based composite material preparation, can solve problems such as insufficient dispersion of tiny particles and high tensile field, and achieve the effects of excellent performance, elimination of bubbles, and cost savings

Inactive Publication Date: 2011-06-08
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because it is difficult to obtain a high tensile field by conventional methods, the main method in engineering at present is to use the shear method to prepare polymer matrix composites.
We know that adding tiny particles to polymers can improve some physical and chemical properties of materials, but commonly used extruders can only provide a shear rate of about 10 3 ~10 4 the s -1 , which is not enough for the dispersion of tiny particles

Method used

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  • Method for preparing polymer-matrix composite material by in-situ bubble stretching one-step defoaming method
  • Method for preparing polymer-matrix composite material by in-situ bubble stretching one-step defoaming method
  • Method for preparing polymer-matrix composite material by in-situ bubble stretching one-step defoaming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Preparation of polypropylene / filler organic masterbatch

[0023]Polypropylene and nano-magnesium hydroxide are mixed in a weight percentage of 70:3, and then 0.1 part of antioxidant 1010, 3 parts of titanate, and 0.1 part of white mineral oil are added to every 100 parts of polypropylene / nanometer magnesium hydroxide mixture, After mixing evenly in the mixer, melt and mix through a twin-screw extruder to produce polypropylene / nanometer magnesium hydroxide organic masterbatch. The temperature of each zone of the twin-screw extruder is: first zone temperature: 170 ° C, second zone temperature: 180 ° C ℃, the temperature of the third zone: 190°C, the temperature of the fourth zone: 180°C, the temperature of the fifth zone: 190°C, the temperature of the sixth zone: 190°C, the twin-screw speed is 30r / min.

[0024] 2) Defoaming with single-twin-screw extruder one-step defoaming method

[0025] Mix the organic masterbatch, AC foaming agent, and antioxidant 1010 in a weight...

Embodiment 2

[0027] 1) Preparation of polypropylene / nanometer calcium carbonate organic masterbatch

[0028] Mix polypropylene and nano-calcium carbonate by weight percentage 100:10, and then add 1 part of antioxidant 1076, 0.1 part of aluminate, 2.5 parts of liquid paraffin to every 100 parts of polypropylene / nanometer calcium carbonate mixture, and put it in a mixer After mixing evenly, melt and mix through a twin-screw extruder to produce polypropylene / nanometer calcium carbonate organic masterbatch. The temperature of each zone of the twin-screw extruder is: first zone temperature: 180°C, second zone temperature: 190°C, third zone temperature Zone temperature: 195°C, zone 4 temperature: 205°C, zone 5 temperature: 215°C, zone 6 temperature: 220°C, twin-screw speed 260r / min.

[0029] 2) Defoaming with single-twin-screw extruder one-step defoaming method

[0030] Mix the organic masterbatch, AC foaming agent, and antioxidant 1076 according to the weight ratio of 100 parts, 1.5 parts, and...

Embodiment 3

[0032] 1) Preparation of polypropylene / filler organic masterbatch

[0033] Mix polypropylene and micron calcium carbonate at a weight percentage of 100:15, then add 0.5 parts of antioxidant 300, 3 parts of stearic acid, and 5 parts of oleic acid amide to every 100 parts of polypropylene / micron calcium carbonate mixture. After mixing evenly in the medium, it is melted and mixed through a twin-screw extruder to produce polypropylene / micron calcium carbonate organic masterbatch. Zone temperature: 230°C, zone 4 temperature: 230°C, zone 5 temperature: 235°C, zone 6 temperature: 230°C, twin-screw speed 600r / min.

[0034] 2) Defoaming with single-twin-screw extruder one-step defoaming method

[0035] Mix the organic masterbatch, AC foaming agent, and antioxidant 300 in a weight ratio of 100 parts, 2 parts, and 0.5 parts in a mixer, and then add them to a single-screw extruder for foaming. After the material is extruded from the head of the single-screw extruder, it directly enters ...

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Abstract

The invention relates to a method for preparing a polymer-matrix composite material by an in-situ bubble stretching one-step defoaming method, belonging to the technical field of polymer-based composite material preparation. The method comprises the following steps: preparing a polypropylene and stuffing organic matter master batch: mixing polypropylene and stuffing, and then adding an antioxidant, a compatibilizer and a processing aid to the mixture of polypropylene and the stuffing; evenly mixing in a blender, and then melting and mixing through a double-screw extruder to prepare the polypropylene and stuffing organic matter master batch; evenly mixing the organic matter master batch, a foaming agent and the antioxidant in the blender, and then adding to a single-screw extruder to carryout foaming; directly entering the double-screw extruder without cooling after the material is extruded from a nose of the single-screw extruder, subsequently defoaming, and finally pelletizing through melting, mixing and extruding. The invention avoids the energy loss caused by cooling then melting and is convenient, simple and direct; moreover, the defoaming effect is more obvious. The invention can be widely used for producing polymer-based composite materials, and the prepared composite materials have good performance.

Description

technical field [0001] The invention belongs to the technical field of polymer-based composite material preparation, and in particular relates to a process and a preparation method of the polymer-based composite material. The invention can be widely used in the production of polymer-based composite materials, and the composite materials prepared by using the process method have excellent properties. Background technique [0002] The most basic and extensive methods for preparing polymer-based composites are the shear dispersion method and the stretch dispersion method. Realize the distribution mixing and dispersion mixing of the dispersed phase. However, because it is difficult to obtain a high tensile field by conventional methods, the shear method is currently the main method in engineering for the preparation of polymer-based composites. We know that adding tiny particles to polymers can improve some physical and chemical properties of materials, but commonly used extru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/10B29C47/92C08L23/14C08L23/12B29C48/92
CPCB29C48/9185B29C48/04B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 吴大鸣刘颖陈卫红许红赵利涛林春平
Owner BEIJING UNIV OF CHEM TECH