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NANO composite material of rubber/layer silicate and preparation method

A nanocomposite material and layered silicate technology, applied in the field of nanocomposite materials, can solve the problems of low intercalation efficiency and weak interfacial interaction, and achieve good intercalation effect, easy operation and control, and excellent performance

Inactive Publication Date: 2005-01-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Another object of the present invention is to provide a preparation method of the composite material, which combines mechanical mixing with reactions such as chemical grafting, which can not only give full play to the advantages of simple process, low cost, and easy implementation of the mechanical mixing intercalation method, The chemical reaction is also introduced as the intercalation power to overcome the shortcomings of weak interfacial interaction and low intercalation efficiency, thereby improving the intercalation nanocomposite effect of rubber and layered silicate, and further improving the performance of nanocomposites

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Use natural rubber (NR), the formula (mass ratio, the same below) is as follows: NR 100, long-chain alkyl quaternary ammonium salt modified montmorillonite (HMMT) and resorcinol and hexamethylenetetramine complex The value of (RH) is shown in Table 1, which is a variable; (for example, NR / HMMT10 / RH6 means that the mass ratio of NR:HMMT:RH is 100:10:6, the same below); stearic acid 2, ZnO4, promote Agent CZ 1.5, accelerator DM 0.5, antioxidant 4010NA 1.5, sulfur 1.5. It is mixed at room temperature on a Ф160 open mill, and then vulcanized on a 25-ton flat vulcanizer at a vulcanization temperature of 143°C. Table 1 lists the mechanical properties of NR / HMMT / RH reactive nanocomposite vulcanizates. It can be seen from the table that after adding RH to the NR / HMMT system, the vulcanizate not only improves the modulus stress, tensile strength, and tear strength, but also increases the elongation at break. NR vulcanizate. This is because the in-situ polycondensation of form...

Embodiment 2

[0036] The rubber is nitrile rubber (NBR), and the formula is as follows: NBR 100, HMMT 10, resorcinol and hexamethylenetetramine complex (RH) as variables, stearic acid 2, ZnO4, accelerator CZ 1.5, Accelerator DM 0.5, anti-aging agent 4010NA 1.5, sulfur 1.5. It is mixed in the Ф160 open mill according to the routine, and then vulcanized on the 25-ton plate vulcanizer, and the vulcanization temperature is 160°C. Determination of interlayer spacing (d) of layered silicate sheets by X-ray diffraction 001 value), the results are shown in Table 2:

[0037] Material

MMT

HMMT

NBR / HMMT

NBR / HMMT / RH4

NBR / HMMT / RH8

d 001 (nm)

1.2

2.6

3.9

4.2

4.8

[0038] It can be seen from Table 2 that the addition of RH expands the interlayer spacing of montmorillonite to 4.2-4.8nm. It can be seen that RH has been inserted into the interlayer of montmorillonite, which promotes the dispersion of montmorillonite sheets. Table 3 l...

Embodiment 3

[0041] The rubber is styrene-butadiene rubber, and the formula is as follows: SBR 100, HMMT 10, resorcinol-stearic acid eutectic (RS) variable, hexamethoxymethylmelamine (RA) variable, ZnO4, stearic acid 2, Sulfur 1.5, Accelerator 2. Knead the sheet at room temperature in an open mill, and then vulcanize it on a flat vulcanizer. The vulcanization condition is 150°C x normal vulcanization time (min). Table 2 shows the mechanical properties of the styrene-butadiene rubber / quaternary ammonium salt modified montmorillonite system with different RS / RA additions. It can be seen that the addition of RS / RA also has a certain reinforcing effect on styrene-butadiene rubber, especially the modulus of elongation is greatly improved, and it maintains a good elongation at break and tear strength.

[0042] 300% fixed

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PUM

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Abstract

A rubber / layered silicate nanocomposite is prepared from rubber, organic modified-layered silicate monomer or mixed monomer and initiator. Its preparing process includes adding organic modified-layered silicate and reactable monomer in rubber mixing procedure or adding proper amount of initiator is necessary, realizing layer-insertion for layered silicate by home polymerization of monomer in course of rubber heating-valcanizing and simultaneously generating graft between rubber and mnonomer or same other chemical combination.

Description

technical field [0001] The invention relates to the technical field of nanocomposite materials, in particular to a rubber / layered silicate nanocomposite material. The invention also relates to a preparation method of the composite material. Background technique [0002] The main feature of nanocomposites (Nanocomposites) is that one component in the composite system has at least one dimension uniformly dispersed in the matrix of another component with a nanometer size (≤100nm), sometimes called hybrid materials or hybrid materials ( Hybrid materials). Organic / inorganic nanocomposites composed of polymers and certain layered silicates. The polymers form a uniform and firm bond with inorganic substances with nano-sized layered structures. The nano-composite surface area is large and the interphase distance is small. There is a special interaction, so its performance is significantly improved compared with the corresponding macro or micro-scale composite materials (for exampl...

Claims

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Application Information

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IPC IPC(8): C08F2/44C08F253/00C08K3/34C08L51/04
Inventor 贾德民罗远芳刘岚
Owner SOUTH CHINA UNIV OF TECH
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