Preparation method of oxidized graphene modified PET (polyethylene terephthalate) material

A graphene modification and graphene technology, which is applied in the field of polyethylene terephthalate material preparation, can solve the problems of flat wire unevenness, poor toughness, brittleness, etc., and achieve broad application surface and elongation at break The effect of rate improvement

Inactive Publication Date: 2015-11-04
ZHEJIANG WANKAI NEW MATERIAL
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyethylene terephthalate (PET) polyester is widely used in daily life, such as plastic bottles, chemical fiber products, films, etc., which are closely related to people's lives, but due to the high strength and rigidity of PET, PET In the process of stretching and pulling into filaments, there are problems such as brittleness, poor toughness, easy breakage, unevenness of drawn flat filaments, and insufficient strength, so the application is greatly limited

Method used

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  • Preparation method of oxidized graphene modified PET (polyethylene terephthalate) material
  • Preparation method of oxidized graphene modified PET (polyethylene terephthalate) material

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Example 1, weigh 15KG of purified terephthalic acid (PTA), 6.655KG of ethylene glycol (EG), 0.599Kg of diethylene glycol (addition amount 5% mol), 4.03g of graphene oxide / water / ethylene glycol solution (graphene addition 5ppm), stabilizer phosphoric acid 42g (phosphorus addition 9ppm). Prepare the slurry first, and then use the pump to continuously transport the slurry to the esterification reaction tank for the first-stage esterification reaction. Use nitrogen to replace the air in the esterification reaction tank, and the replacement is completed. The rotation speed of the agitator is 60rpm, the frequency is 50HZ, and the esterification reaction is carried out by heating to above 190°C. The esterification reaction temperature is 250-255°C, and the esterification pressure is medium At 0.2-0.25MPa (relative pressure), the esterification reaction time is 3 hours, the material temperature when the esterification reaction is completed is about 258°C, and the esterification...

Embodiment 2

[0027] As in Example 1, but purified terephthalic acid (PTA) 14.7KG, isophthalic acid (IPA) 0.3KG (addition amount 2% mol), ethylene glycol (EG) 6.795KG, diethylene glycol 0.359Kg (addition amount 3% mol), graphene oxide / water / ethylene glycol solution 80.64g (graphene oxide addition amount 100ppm). The prepared basic slices were dried, pulled and stretched on a PET wire drawing machine, and various tests were carried out. The results are shown in Table 1.

Embodiment 3

[0029] As in Example 1, but graphene oxide / water / ethylene glycol solution 806.4g (graphene oxide addition 1000ppm). The prepared basic slices were dried, pulled and stretched on a PET wire drawing machine, and various tests were carried out. The results are shown in Table 1.

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Abstract

A preparation method of an oxidized graphene modified PET (polyethylene terephthalate) material is characterized by comprising steps as follows: purified terephthalic acid, binary acid, ethylene glycol, dihydric alcohol and a solution of an oxidized graphene liquid and ethylene glycol are firstly mixed to form slurry, and the esterification rate of an esterification reaction kettle outlet is larger than or equal to 92%; a catalyst is added after an esterification reaction ends; a monomer prepared through the esterification reaction is subjected to a second-stage condensation polymerization reaction in a pre-condensation kettle; the temperature of the material subjected to pre-condensation ranges from 265 DEG C to 275 DEG C; the absolute pressure ranges from 1 KPa to 30 KPa, and the time ranges from 1 hour to 1.5 hours; low-grade polymer obtained after the pre-condensation reaction is conveyed to a final condensation polymerization tank for a further condensation polymerization reaction, and the intrinsic viscosity is increased to be at least 0.60 dl/g. Compared with the prior art, the preparation method has the advantages as follows: the oxidized graphene in an appropriate proportion is added to the material, the intrinsic viscosity, the breaking strength and the elongation at break are remarkably improved, and the application range of PET is greatly widened.

Description

technical field [0001] The invention relates to a method for preparing a polyethylene terephthalate material, belonging to the technical field of polymer production. Background technique [0002] Polyethylene terephthalate (PET) polyester is widely used in daily life, such as plastic bottles, chemical fiber products, films, etc., which are closely related to people's lives, but due to the high strength and rigidity of PET, PET In the process of stretching and pulling into filaments, there are problems such as brittleness, poor toughness, easy breakage, unevenness of drawn flat filaments, and insufficient strength, so the application is greatly limited. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for preparing a high-performance PET material in view of the above-mentioned technical status quo. [0004] The technical solution adopted by the present invention to solve the above-mentioned technical prob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/78C08K3/04
Inventor 郑兵邱增明章延举肖海军沈志刚
Owner ZHEJIANG WANKAI NEW MATERIAL
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