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Preparation method of modified magnesium borate whisker/PP (propene polymer) composite material

A technology of magnesium borate whiskers and composite materials, which is applied in the field of polymer composite materials and the preparation of modified magnesium borate whiskers/PP composite materials, can solve the problems of limited wide application, large PP molding shrinkage rate, and high low temperature brittleness. To achieve the effect of broad application prospects, low cost and improved mechanical properties

Inactive Publication Date: 2012-06-20
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PP has a large shrinkage rate and high low-temperature brittleness, which greatly limits its wide application.

Method used

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  • Preparation method of modified magnesium borate whisker/PP (propene polymer) composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The magnesium borate whisker sample that this example adopts is provided by Liaoning Yingkou Brother Boron Magnesium Chemical Co., Ltd. The surface modification treatment method of magnesium borate whiskers is as follows: put a 250ml flask containing 0.5g of coupling agent in an ultrasonic oscillator with a water temperature of 30-50°C, dissolve it in 100ml of absolute ethanol and add 25g of 120-140 The whiskers were dried at ℃ for 4 hours, electrically stirred and ultrasonically oscillated for 0.5-1 hour, filtered and washed, and then dried at 90-120 degrees Celsius for 4-6 hours to obtain surface-modified whiskers.

[0020] In this example, the modified magnesium borate whisker / PP composite material is prepared by the melt blending method, and the process is as follows:

[0021] (1) After the mixer is preheated to 185°C, add 100 parts of PP base material to melt for 5 minutes, add 2 parts of modified magnesium borate whiskers and mix for 8 minutes to obtain a semi-fin...

Embodiment 2

[0025] The surface modification treatment method of magnesium borate whisker is the same as example 1.

[0026] In this example, the modified magnesium borate whisker / PP composite material is prepared by the melt blending method, and the process is as follows:

[0027] (1) After the mixer is preheated to 185°C, add 100 parts of PP base material to melt for 5 minutes, add 5 parts of modified magnesium borate whiskers and mix for 8 minutes to obtain a semi-finished product;

[0028] (2) The semi-finished product obtained in step (1) is molded in a molding machine at a pressure of 10 MPa and a temperature of 185° C. for 6 minutes to obtain the modified magnesium borate whisker / PP composite material.

[0029] Composite material in embodiment 2 is made into standard tension and impact sample, carries out tension and impact performance test according to GB / T 1040-2006, GB / T 1843-1996 respectively, its result sees figure 1 .

Embodiment 3

[0031] The surface modification treatment method of magnesium borate whisker is the same as example 1.

[0032] In this example, the modified magnesium borate whisker / PP composite material is prepared by the melt blending method, and the process is as follows:

[0033] (1) After the mixer is preheated to 185°C, add 100 parts of PP base material to melt for 5 minutes, add 10 parts of modified magnesium borate whiskers and mix for 8 minutes to obtain a semi-finished product;

[0034] (2) Mold the semi-finished product obtained in step (1) in a molding machine at a pressure of 10 MPa and a temperature of 185°C for 6 minutes to obtain the modified magnesium borate whisker / PP composite material.

[0035] Composite material in embodiment 3 is made standard tension and impact sample, carries out tension and impact property test by GB / T 1040-2006, GB / T 1843-1996 respectively, and its result sees figure 1 .

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Abstract

The invention relates to a preparation method of a modified magnesium borate whisker / PP (propene polymer) composite material. In the method, a PP material is used as a matrix, and a borate coupling agent modified magnesium borate whisker is used as reinforcement. The preparation method comprises the following steps of: (1) sufficiently dissolving 1 to 3 parts by mass of borate coupling agent with a proper amount of absolute ethanol at a temperature of between 30 and 50 DEG C, and uniformly mixing for 0.5 to 1 hour with 97 to 99 parts by mass of magnesium borate whisker which is dried for 4 hours at a temperature of between 120 and 140 DEG C, filtering, cleaning, and baking at a temperature of between 90 and 120 DEG C for 4 to 6 hours to obtain a surface modified whisker; (2) preheating a mixing mill to a temperature of between 180 and 200 DEG C, adding a PP base material to melt for 3 to 5 minutes, and adding the borate coupling agent modified magnesium borate whisker which is prepared in the step (1) according to a proportion to mix for 8 to 10 minutes to prepare a semifinished product; and (3) molding the semifinished product prepared in the step (2) for 6 to 8 minutes in a molding machine at a pressure of 10MPa and a temperature of between 180 and 185 DEG C to prepare the modified magnesium borate whisker / PP composite material. The preparation method of the invention has the advantages of simple conditions and low cost; and the mechanical performance of the modified magnesium borate whisker / PP composite material is remarkably improved, and the application prospect is wide.

Description

1. Technical field [0001] The invention relates to a method for preparing a modified magnesium borate whisker / PP composite material, and belongs to the field of polymer composite materials, especially the manufacture of polypropylene-based composite materials. 2. Background technology [0002] Compared with other general-purpose plastics, polypropylene (PP) is widely used in automobiles due to its abundant raw materials, simple synthesis process, low relative density, excellent processing performance, good electrical insulation, corrosion resistance, and good gloss. , electrical appliances, daily necessities and other fields. However, PP has a large molding shrinkage rate and high low-temperature brittleness, which greatly limits its wide application. [0003] Whiskers are a type of fibrous single crystal with a small diameter, generally 0.1-10 μm, and an aspect ratio of 10-100. Due to the extremely small size of the whiskers, the relatively complete crystal structure, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K9/04C08K7/08
Inventor 陈善华吴永嘉
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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