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Creep-resistant polyester and its preparation method

A technology of creep resistance and polyester, applied in the direction of single-component copolyester rayon, conjugated synthetic polymer rayon, etc., to improve creep resistance, expand application range, and increase relative molecular weight Effect

Active Publication Date: 2014-02-05
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on creep resistance of polyester

Method used

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  • Creep-resistant polyester and its preparation method
  • Creep-resistant polyester and its preparation method
  • Creep-resistant polyester and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Preparation of 4,4'-[2,2,2-trifluoro-1-(trifluoromethyl)ethylene]diphenol diglycidyl ether:

[0049] In a nitrogen atmosphere, mix epichlorohydrin and 4,4′-[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene]diphenol at a molar ratio of 4:1 , add 1.5% 15mol / L sodium hydroxide solution of 4,4'-[2,2,2-trifluoro-1-(trifluoromethyl)ethylene]diphenol mass, at room temperature Stir the reaction for 16h; then cool to room temperature, then add 30% of the mass of 4,4'-[2,2,2-trifluoro-1-(trifluoromethyl)ethylene]diphenol with anhydrous carbonic acid Sodium-saturated 5mol / L sodium hydroxide solution, stirred and reacted at room temperature for 10h; then extracted with chloroform, and the resulting organic phase was evaporated to remove chloroform and excess epichlorohydrin to obtain a thick liquid, which was added to anhydrous Recrystallization in ethanol to obtain crystals of 4,4'-[2,2,2-trifluoro-1-(trifluoromethyl)ethylene]diphenol diglycidyl ether;

[0050] Preparation of fluor...

Embodiment 2

[0054] Preparation of 4,4'-[2,2,2-trifluoro-1-(trifluoromethyl)ethylene]diphenol diglycidyl ether:

[0055] In a nitrogen atmosphere, mix epichlorohydrin and 4,4′-[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene]diphenol at a molar ratio of 4:1 , add 2.0% 10mol / L sodium hydroxide solution of 4,4'-[2,2,2-trifluoro-1-(trifluoromethyl)ethylene]diphenol mass, at room temperature Stir the reaction for 18 hours; cool to room temperature, then add 40% of the mass of 4,4'-[2,2,2-trifluoro-1-(trifluoromethyl)ethylene]diphenol with anhydrous sodium carbonate Saturated 3mol / L sodium hydroxide solution, stirred and reacted at room temperature for 15h; then extracted with chloroform, the resulting organic phase was evaporated to remove chloroform and excess epichlorohydrin to obtain a thick liquid, which was added to absolute ethanol Medium recrystallization, that is to obtain 4,4'-[2,2,2-trifluoro-1-(trifluoromethyl)ethylene]diphenol diglycidyl ether crystals;

[0056] Preparation of fluo...

Embodiment 3

[0060] Preparation of 4,4'-[2,2,2-trifluoro-1-(trifluoromethyl)ethylene]diphenol diglycidyl ether:

[0061] In a nitrogen atmosphere, mix epichlorohydrin and 4,4′-[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene]diphenol at a molar ratio of 4:1 , add 1.8% 12mol / L sodium hydroxide solution of 4,4'-[2,2,2-trifluoro-1-(trifluoromethyl)ethylene]diphenol mass, at room temperature Stir the reaction for 17h; cool to room temperature, then add 35% of the mass of 4,4'-[2,2,2-trifluoro-1-(trifluoromethyl)ethylene]diphenol with anhydrous sodium carbonate Saturated 4mol / L sodium hydroxide solution, stirred and reacted at room temperature for 13h; then extracted with chloroform, the resulting organic phase was evaporated to remove chloroform and excess epichlorohydrin to obtain a thick liquid, which was added to absolute ethanol Medium recrystallization, that is to obtain 4,4'-[2,2,2-trifluoro-1-(trifluoromethyl)ethylene]diphenol diglycidyl ether crystals;

[0062] Preparation of fluorine-...

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Abstract

The invention relates to creep-resistant polyester and its preparation method. According to the preparation method, polyester is mixed with a fluorine-containing epoxy compound or a fluorine-containing epoxy compound is added during the synthesis process of polyester. Then, the creep-resistant polyester can be obtained. By the use of the fluorine-containing epoxy compound for blocking modification of the polyester, creep-resistant performance of the polyester can be improved to some extent, and hydrolysis resistance and performance stability of the polyester can be raised. Fiber prepared from the creep-resistant polyester can be used in a hot and humid environment for a long time, and has a huge prospect in the fields of plastic packing, waterproof fabric, ropes, cables, marine fiber and the like.

Description

technical field [0001] The invention relates to a creep-resistant polyester and a preparation method thereof, in particular to a creep-resistant polyester modified by using a fluorine-containing epoxy compound as an end-capping agent and a preparation method thereof. Background technique [0002] Polyester (PET) is one of the most widely used synthetic polymers by humans. It has high strength, high modulus and good heat resistance. It is the earliest linear thermoplastic polymer to achieve industrial applications. It is used in plastic packaging, film And chemical fiber and other fields have been widely used. [0003] The molecular chain structure of polyester is a linear macromolecule containing a benzene ring structure, the functional groups on the molecular chain are arranged neatly, there are no branches, and the flexibility of the macromolecular chain is poor. Compared with other polymer materials, it is more difficult for the molecular chain of polyester to slip, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/84D01F8/14C08G81/00C08G63/682
Inventor 高亮王丽丽李文刚汤方明孙晓华
Owner JIANGSU HENGLI CHEM FIBER
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