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Method for preparing nano composite material of polyvinyl chloride/layer silicate

A nano-composite material and layered silicate technology, applied in the field of nano-composite materials, can solve the problems of limiting the performance of composite materials, weak two-phase interface bonding force, difficult to control, etc. The effect of sex, convenient operation

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

AI Technical Summary

Problems solved by technology

The preparation methods of polyvinyl chloride / layered silicate nanocomposites reported so far include macromolecule melt intercalation method, monomer in-situ polymerization intercalation method (including bulk method, emulsion method, suspension method), etc., among which melt intercalation The preparation process of the layer method is simple and has the most research, while the process of the monomer in-situ polymerization intercalation method is usually complicated and difficult to control
However, the melt intercalation of polyvinyl chloride must use organically modified layered silicate, usually with long-chain organic quaternary ammonium salts in aqueous media to pre-organize through ion exchange, the process is complicated, the cost is high, and it pollutes the environment; At the same time, the nanocomposites obtained by melt intercalation of polyvinyl chloride and layered silicate studied so far have low macromolecular intercalation efficiency and weak interfacial bonding force between the two phases, which limits the further improvement of the performance of composite materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 40 parts of butyl acrylate (BA), 30 parts of methyl methacrylate (MMA) and 10 parts of maleic anhydride (MAH), mix and stir until MAH is completely dissolved, then add dibenzoyl peroxide (BPO) 2.0 portion, and stir until completely dissolved. Weigh 100 parts of polyvinyl chloride, 40 parts of unmodified montmorillonite (MMT), and fully stir and mix with the aforementioned mixed monomers. The mixed materials were put into the reactor and left at room temperature for 3 hours. Nitrogen was then introduced into the reactor, and the reaction was heated at 80° C. for 6 hours. Finally, vacuumize and heat at 100° C. for 1 hour to obtain a grafted and intercalated polyvinyl chloride / MMT nanocomposite masterbatch.

[0020] Table 1 has listed above-mentioned polyvinyl chloride / MMT masterbatch to add the mechanical property of the polyvinyl chloride / MMT nanocomposite material that makes in polyvinyl chloride formula and the polyvinyl chloride material of contrast, as can be...

Embodiment 2

[0023] Weigh 40 parts of BA, 20 parts of MMA and 20 parts of MAH, mix and stir until MAH is completely dissolved, then add 2.0 parts of dibenzoyl peroxide (BPO), and stir until it is completely dissolved. Weigh 100 parts of polyvinyl chloride and 80 parts of organically modified montmorillonite (OMMT), and fully stir and mix them with the aforementioned mixed monomers. The mixed materials were put into the reactor and left at room temperature for 3 hours. Nitrogen gas was then introduced into the reactor, and the reaction was heated at 100° C. for 4 hours. Finally, vacuumize and heat at 100° C. for 1 hour to obtain the graft-intercalation polyvinyl chloride / OMMT nanocomposite masterbatch.

Embodiment 3

[0025] Weigh 3 parts of BA, 1 part of MMA and 1 part of MAH, mix and stir until MAH is completely dissolved, then add 0.1 part of azobisisobutyronitrile (AIBN), and stir until it is completely dissolved. Weigh 100 parts of polyvinyl chloride, 6 parts of organically modified montmorillonite (OMMT), and fully stir and mix with the aforementioned mixed monomers. The mixed materials were put into the reactor and left at room temperature for 3 hours. Nitrogen gas was then introduced into the reactor, and the reaction was heated at 60° C. for 6 hours. Finally, vacuumize and heat at 100° C. for 1 hour to obtain a graft-intercalation polyvinyl chloride / OMMT nanocomposite material.

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PUM

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Abstract

The present invention relates to a preparation method of polyvinylchloride / lamellor silicate nano composite material. It is characterized by that in the polyninylchloride and lamellar silicate powder mixed system two kinds of more than two kinds of monomers are added to make solid-phase reaction. These monomers not only can be inserted into interlayer of lamellar silicate and in-situ polymerized,but also can be graft-polymerized with polyvinylchloride macromolecular chain so as to make polyvinylchloride large molecule and lamellar silicate flake layer produce firm combination so as to obtainnano composite material with excellent mechanical property and working property.

Description

technical field [0001] The invention relates to the technical field of nanocomposite materials, in particular to a polyvinyl chloride / layered silicate nanocomposite material by a solid-phase grafting intercalation method and a preparation method thereof. Background technique [0002] Nanocomposites (Nanocomposites) refer to composite materials in which one component in the composite system is uniformly dispersed in another component in nanometer size (≤100nm) in at least one dimension. Polymer / phyllosilicate nanocomposites composed of polymers and certain layered silicates. The polymers form a uniform and firm bond with layered inorganic substances with nanometer dimensions. The surface area of ​​nanometers is large, and The distance between the phases is small and there is a special interaction, so its performance is significantly improved compared with the corresponding macro or micro-scale composite materials, and even shows new properties or functions. Since the mid-198...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08K3/34C08F2/44
Inventor 贾德民周盾白蔡长庚
Owner SOUTH CHINA UNIV OF TECH
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