Preparation process for nano composite of polyester / clay

A technology of nanocomposite materials and clay, which is applied in the field of preparation of PET/clay nanocomposite materials, and can solve problems such as poor thermal stability and uneven dispersion of montmorillonite

Inactive Publication Date: 2005-03-23
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the invention is to overcome the disadvantages of poor thermal stability of polyester / clay nanocomposites in the past, and the montmorillonite dispersion is not uniform enough to provide a preparation method for polyester / clay nanocomposites, improve the dispersion uniformity of montmorillonite, and the Polyester / clay nanocomposites have high thermal stability

Method used

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  • Preparation process for nano composite of polyester / clay
  • Preparation process for nano composite of polyester / clay

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 10.0 g of montmorillonite with a cation exchange capacity of 100 meq / 100 g to 150 g of ethylene glycol, heat to 80° C., and stir at high speed to obtain a suspension.

[0018] Dissolve 0.4g of antimony acetate in 40g of ethylene glycol heated to 80°C to obtain a solution. Slowly add the solution to the above suspension, stir at 80°C for 4 hours, cool to room temperature naturally, centrifuge to obtain a precipitate, wash with ethylene glycol three times, the distance between the layers of montmorillonite expands from 1.2nm to 1.7nm, indicating that Sb 3+ Has been exchanged between layers of montmorillonite.

[0019] Disperse the above wet montmorillonite evenly in 200g of water, dissolve 3.2g of hexadecyltriphenylphosphine bromide in 100g of water, add it to the montmorillonite water suspension, stir at 90°C for 4 hours, centrifuge and wash with distilled water Repeatedly until no bromide ions are detected with 0.1N silver nitrate solution, the product is dried an...

Embodiment 2

[0022] Add 8.0 g of montmorillonite with a cation exchange capacity of 110 meq / 100 g to 120 g of ethylene glycol, heat to 80° C., and stir at high speed to obtain a suspension.

[0023] Dissolve 0.3g of antimony acetate in 15g of ethylene glycol heated to 80°C to obtain a solution. Slowly add the solution to the above suspension, stir at 80°C for 4 hours, cool to room temperature naturally, centrifuge to obtain a precipitate, wash with ethylene glycol three times, the distance between the layers of montmorillonite expands from 1.2nm to 1.7nm, indicating that Sb 3+ Has been exchanged between layers of montmorillonite.

[0024] Disperse the above wet montmorillonite evenly in 200g of water, dissolve 2.1g of hexadecylpyridinium bromide in 100g of water, add it to the montmorillonite water suspension, stir at 90°C for 4 hours, then centrifuge and wash with distilled water for several times until 0.1N silver nitrate solution was used to detect the absence of bromide ions, and the...

Embodiment 3

[0027] Add 15.0 g of montmorillonite with a cation exchange capacity of 90 meq / 100 g to 250 g of ethylene glycol, heat to 80° C., and stir at high speed to obtain a suspension.

[0028] Dissolve 0.7g of antimony acetate in 60g of ethylene glycol heated to 80°C to obtain a solution. The solution was slowly added to the above suspension, stirred at 80°C for 4 hours, cooled to room temperature naturally, centrifuged to obtain a precipitate, and washed three times with ethylene glycol.

[0029] Disperse the above wet montmorillonite evenly in 300g of water, dissolve 8.0g of polyvinylpyrrolidone in 100g of water, add it to the montmorillonite water suspension, stir at 90°C for 2 hours, then centrifuge, wash with distilled water several times, and centrifuge the obtained product It is organic montmorillonite powder with catalytic activity, and the interlayer distance of montmorillonite is further enlarged to 3.5nm.

[0030] 100g of BHET and 2.0g of the above-mentioned montmorilloni...

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Abstract

The invention discloses a polyester / clay nano-composite preparing method, inserting polyethylene glycol terephthalate polycondensation catalyst and organic intercalation agent at the same time, to enlarge their space, beneficial to macromolecular chains of polyethylene glycol terephthalate entering into the montmorillonite layers, simultaneously the catalytic reaction centre in the layer, using large amount of polymerization heat to further open them, even dissociating them, for improving montmorillonite dispersive uniformity, and high thermal stability.

Description

technical field [0001] The invention relates to a preparation method of polyethylene terephthalate (PET) composite material, in particular to a preparation method of PET / clay nano composite material. Background technique [0002] PET is a kind of polymer with excellent comprehensive properties. It is widely used in the fields of fiber, beverage bottle and engineering plastics. However, its disadvantages such as slow crystallization speed, low heat distortion temperature and poor gas barrier property limit its application range. Patent CN1272513 first uses alkyl ammonium salt as an intercalation agent to intercalate montmorillonite to obtain organic montmorillonite, then disperses organic montmorillonite in PET monomer or prepolymer, and adds a catalyst for in-situ PET / clay nanocomposites are prepared by polymerization. The thermal deformation temperature, crystallization rate and flexural modulus of the composite are significantly improved compared with pure PET, but the the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/78C08K3/34C08L67/03
Inventor 李春成管国虎张栋
Owner INST OF CHEM CHINESE ACAD OF SCI
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