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Preparation method of polyamide/nano montmorillonite masterbatch

A nano-montmorillonite and polyamide technology, applied in the field of composite materials, can solve problems such as difficulty, long period, and impact on composite materials, and achieve the effect of improving tensile strength and bending strength, simple method, and expanding interlayer distance

Inactive Publication Date: 2007-12-05
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The other is the melt intercalation method. The so-called melt intercalation method refers to mixing the molten polymer with the montmorillonite treated with organic intercalation under the action of high temperature and high shear force, and the macromolecular chain is inserted into the montmorillonite layer. However, this method generally can only obtain intercalated composite materials, and it is difficult to obtain completely exfoliated montmorillonite composite materials
[0004] In-situ intercalation polymerization technology can obtain high-performance exfoliated montmorillonite composite materials, but there are high technical requirements for organic intercalation agents and montmorillonite. The industrialization of in-situ intercalation polymerization requires large investment, long cycle, and difficult Promote application
The melt intercalation method can be carried out in general plastic mixing equipment, and the processing is convenient. However, it is necessary to carry out organic intercalation treatment on montmorillonite in the early stage, and the defects of poor thermal stability and easy discoloration of the organic intercalation agent also obviously affect It is not easy to obtain a completely exfoliated montmorillonite composite material, which restricts the application of this method

Method used

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  • Preparation method of polyamide/nano montmorillonite masterbatch

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Effect test

Embodiment 1

[0028] Purify 10 parts of montmorillonite, 90 parts of deionized water, stir and disperse to obtain montmorillonite slurry, add 90 parts of polyamide 6 to the internal mixer at 220°C, and gradually add montmorillonite after polyamide 6 is completely melted After adding the slurry within 20 minutes, continue to knead in an internal mixer at 220°C for 10 minutes, and then extrude and granulate to obtain a polyamide / montmorillonite masterbatch, that is, a polyamide / nano-montmorillonite masterbatch. The XRD pattern of the masterbatch is shown in Figure 1, and the TEM photo is shown in Figure 2.

Embodiment 2

[0030] Purify 20 parts of montmorillonite, 300 parts of deionized water, stir and disperse to obtain montmorillonite slurry, add 80 parts of polyamide 6 to the internal mixer at 220°C, and gradually add montmorillonite after polyamide 6 is completely melted For slurry, continue mixing at 220°C for 15 minutes after adding within 40 minutes. The polyamide / montmorillonite masterbatch with a montmorillonite content of 20% is obtained through extrusion granulation. The XRD of the masterbatch is shown in Figure 1. Add 10 parts of the masterbatch to 90 parts of pure polyamide 6 resin, extrude and granulate at 230 ° C, and obtain the polyamide / montmorillonite nanocomposite material accordingly, and the (001) diffraction of montmorillonite in its XRD spectrum The peaks all disappeared, see Figure 3.

Embodiment 3

[0032] Purify 15 parts of montmorillonite, 150 parts of deionized water, stir and disperse to obtain montmorillonite slurry, add 85 parts of polyamide 66 to the internal mixer at 260 °C, after polyamide 66 is completely melted, gradually add montmorillonite After adding the slurry within 30 minutes, continue to knead at 220°C for 10 minutes, extrude and granulate to obtain a polyamide / montmorillonite masterbatch with a montmorillonite content of 15%. The XRD pattern of the masterbatch is shown in Figure 1.

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Abstract

The present invention is preparation process of polyamide / nanometer montmorillonite base material. The polyamide / nanometer montmorillonite base material comprising montmorillonite 1-30 wt% and polyamide 70-99 wt% is prepared with deionized water in 9-15 times the weight of montmorillonite as the intercalating agent, and through mixing purified montmorillonite with deionized water to form slurry, adding molten polyamide, blending at 210-300 for 10-60 min, and pelletizing. The polyamide / nanometer montmorillonite base material has simple preparation process, low production cost and high stripping performance.

Description

(1) Technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a preparation method of a polyamide / nanometer montmorillonite masterbatch. (2) Background technology [0002] The sufficient exfoliation of montmorillonite in polymers is the key technology to realize high-performance composite materials. At present, the preparation methods of polymer / montmorillonite composite materials are usually the following two types: one is the in-situ intercalation polymerization method, the so-called in-situ intercalation method refers to the first intercalation of polymer precursor small molecules to the organic Between the treated montmorillonite layers, the small molecules are polymerized between the montmorillonite layers, and the large amount of heat released during the polymerization is used to make the montmorillonite expand and peel off, thereby obtaining a composite material. [0003] The other is the melt intercalati...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08L77/06C08K3/34
Inventor 钱欣张宏
Owner ZHEJIANG UNIV OF TECH
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