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Polyethylene terephthalate/montmorillonite nano composite material and preparation method thereof

A technology of polyethylene terephthalate and nanocomposite materials, which is applied in the field of polyethylene terephthalate/montmorillonite nanocomposite materials and its preparation, can solve the problem of very limited and very limited material performance improvement. It is difficult to obtain exfoliated nanocomposite materials and other problems, and achieve the effect of improving heat resistance and performance enhancement

Inactive Publication Date: 2008-08-13
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, since the intercalation agent for the organic treatment of montmorillonite is mainly a small molecule intercalation agent represented by organic ammonium cations, the interlayer distance of montmorillonite is only increased when the montmorillonite is modified. , that is, the increase from the original 1nm to 2-3nm does not destroy the regular layer periodic arrangement of montmorillonite, so it is difficult to obtain exfoliation in the polyester / montmorillonite composite material prepared by this organic montmorillonite Type of nanocomposite materials, the improvement of material properties is very limited

Method used

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  • Polyethylene terephthalate/montmorillonite nano composite material and preparation method thereof
  • Polyethylene terephthalate/montmorillonite nano composite material and preparation method thereof
  • Polyethylene terephthalate/montmorillonite nano composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The complete mass percentage concentration of dissolving is 1% chitosan hydrochloride (molecular weight is 50000, deacetylation degree 90%, hydrochloride substitution degree 20%) aqueous solution according to the quality of chitosan hydrochloride and montmorillonite The ratio is 1:2, and the ratio is 1:2, and then added dropwise to the aqueous suspension of nano-based montmorillonite with a concentration of 2% by mass, stirred at 50°C for 4 hours, and the solid in the lower layer is removed, and rinsed with hot water until there is no Cl - To prevent ions, dry the obtained solid at <100°C until the water content is 5% to obtain organic montmorillonite;

[0034] Add 3 parts of organic montmorillonite to 138 parts of ethylene glycol based on the amount of untreated montmorillonite, and stir at a temperature of 50°C to obtain a uniformly dispersed ethylene glycol suspension;

[0035] First add 243 parts of terephthalic acid, 0.03% antimony trioxide catalyst and ethylene g...

Embodiment 2

[0037] The complete mass percent concentration of dissolving is 2% chitosan hydrochloride (molecular weight is 70000, deacetylation degree 70%, hydrochloride substitution degree 40%) aqueous solution according to the quality of chitosan hydrochloride and montmorillonite The ratio of 1:1.5 was added dropwise to the calcium-based montmorillonite aqueous suspension with a mass percent concentration of 1%, stirred at 60°C for 5 hours, and the solid in the lower layer was removed, and rinsed with hot water until there was no Cl - To prevent ions, dry the obtained solid at <100°C until the water content is 5% to obtain organic montmorillonite;

[0038] Add 3 parts of organic montmorillonite to 138 parts of ethylene glycol based on the amount of untreated montmorillonite, and stir at a temperature of 60° C. to obtain a uniformly dispersed ethylene glycol suspension;

[0039] Because the proportioning and process conditions of esterification and polymerization are exactly the same as...

Embodiment 3

[0041] The complete mass percentage concentration of dissolving is 3% chitosan hydrochloride (molecular weight is 100000, deacetylation degree 70%, hydrochloride substitution degree 40%) aqueous solution according to the quality of chitosan hydrochloride and montmorillonite The ratio is 1:1 and added dropwise to the sodium-based montmorillonite aqueous suspension with a concentration of 2% by mass, stirred at 60°C for 5 hours, and the solid in the lower layer is removed, and rinsed with hot water until there is no Cl - To prevent ions, dry the obtained solid at <100°C until the water content is 20% to obtain organic montmorillonite;

[0042] Add 3 parts of organic montmorillonite to 138 parts of ethylene glycol based on the amount of untreated montmorillonite, and stir at a temperature of 60° C. to obtain a uniformly dispersed ethylene glycol suspension;

[0043] Because the proportioning and process conditions of esterification and polymerization are exactly the same as thos...

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Abstract

The invention relates to a polyethylene glycol terephthalate / montmorillonite nano-composites, which includes mass percent 0.5% to 2% organic montmorillonite processed by chitosan hydrochloride. The color in appearance is from reddish to deep red. A film is prepared by hot press the materials, whose limiting viscosity number is between 0.53 and 0.55, vitrification point is between 83 and 85 DEG C, tensile-strength is between 32.0 and 44.0 MPa, and tensile modulus is between 720 and 930 Mpa. The invention aslo discloses its preparation method. The nano-composite includes montmorillonite processed by chitosan hydrochloride, so the lamellar structure arrayed regularly is destroyed, which is distributed evenly in PET matrix in nano-meter and is almost in a removed state. Thereby when additional quantity is a little low, the tensile strength and tensile modulus are greater considerably than pure PET, and the resistance to effect of heat is also improved.

Description

technical field [0001] The invention belongs to the technical field of polyester / inorganic filler nano composite material and its preparation, and in particular relates to a polyethylene terephthalate / montmorillonite nano composite material and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET, referred to as polyester) is a thermoplastic semi-crystalline polymer material, which not only has a relatively low price, but also has high impact strength, friction resistance, high hardness, and low hygroscopicity. , Good dimensional stability, non-toxic and odorless, convenient processing, clean and transparent appearance of the parts, and also has the advantages of being stable to most organic solvents and inorganic acids, so it is used in fiber, film, packaging bottles, engineering plastics and other fields It has extensive and important application value. [0003] In order to improve polyester crystallization properties, antistatic pro...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08K9/04C08K3/34C08G63/78
Inventor 傅强陈昭军罗平张琴
Owner SICHUAN UNIV
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