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Process for preparing nylon 6/montmorillonite composite

A technology of montmorillonite and composites, applied in the field of polymer nanocomposite materials, can solve the problems of insufficient economical environmental pollution, long reaction time, etc., and achieve the effects of reducing environmental pollution, shortening reaction time, and uniform performance

Inactive Publication Date: 2002-07-24
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem that the present invention needs to solve is to disclose a kind of method of producing nylon 6 / montmorillonite compound, the present invention synthesizes nylon 6 / montmorillonite compound by the method for reactive extrusion, adopts caprolactam monomer to insert montmorillonite The anionic intercalation composite polymerization method reacts and extrudes the nylon 6 / montmorillonite composite in a twin-screw reaction extruder, and the resulting composite material has good properties, and its mechanical properties and thermal stability are comparable to those of pure nylon polymers. Significantly improved compared to, with high strength, high modulus, high heat distortion temperature, good barrier properties, can prepare engineering plastics and fibers with excellent performance, so as to overcome the long reaction time existing in the prior art, not economical and exist Defects of Environmental Pollution

Method used

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  • Process for preparing nylon 6/montmorillonite composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Feed caprolactam monomer, catalyst sodium caprolactam, and activator 2-4 xylene diisocyanate in proportions of 98%, 1% and 1% by mass, add to the pretreatment tank, start vacuuming and stir.

[0034] Then the temperature of the pretreatment tank was raised to 100°C to melt the monomer. After the temperature rises to 100°C, vacuum is maintained for about 2 hours to remove water in the system as much as possible.

[0035] After dehydration is completed, fill with nitrogen (pressure is 0.1kg / cm 2 ) to protect the material in the kettle, then add 3% montmorillonite by mass percentage, continue to vacuumize for 30 minutes, and fill with nitrogen for protection. Then let the mixed melt continue to stir in the pretreatment tank for 15 minutes to complete the preparation of the polymerization active material.

[0036]After the preparation of the polymer active body is completed, open the ball valve at the lower part of the pretreatment tank, let the active body be injected in...

Embodiment 2

[0040] Same as Example 1, only the amount of montmorillonite accounted for 5% of the total weight, to prepare nylon / montmorillonite composite.

Embodiment 3

[0042] Same as Example 1, only the amount of montmorillonite accounted for 7% of the total weight, to prepare nylon / montmorillonite composite.

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Abstract

A process for preparing nylon 6 / montmorillonite composite is characterized by use of reaction-extrusion method, that is, the caprolactam and said montmorillonite take part in intercalation polymerization in the reaction extruder to inserting the caprolactam monomers in anionic layers of montmorillonite. Its advantages are high strength, modulus and thermal deformation temp, better isolating performance, simple process, and low cost. It can be used to prepare high-performance engineering plastics and fibres.

Description

technical field [0001] The invention belongs to the technical field of polymer nanocomposite materials, and relates to a preparation method of a nylon 6 / montmorillonite composite, in particular to a method for preparing a nylon 6 / montmorillonite composite by reactive extrusion molding. Background technique [0002] The nanocomposite material refers to a composite material in which the size of the dispersed phase material is at least 100 nm or less in one dimension. Nanocomposite materials are an important research and development direction of nanoscience. In recent years, nanocomposites have attracted widespread attention in many scientific fields, and become the focus and hotspot of material science research. [0003] Due to the surface effect, volume effect, quantum size effect and macroscopic quantum effect of nanoparticles, plus many excellent properties of polymers such as low density, high strength, corrosion resistance, and easy processing. Nanoparticles not only si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/40C08K3/34C08L77/00
Inventor 王依民赵明倪建华潘湘庆邹黎明
Owner DONGHUA UNIV
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