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A method for testing the content of inorganic functional powder in functional polyester

A testing method and functional powder technology, applied in the direction of weighing by removing certain components, can solve the problems of high thermal weight loss mass residual rate, inability to directly and accurately measure the content of inorganic functional powders, etc.

Active Publication Date: 2020-10-20
CHINESE TEXTILE ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high benzene ring content of the polyester molecular chain, the thermogravimetric analysis in an inert gas has a high mass residual rate of thermogravimetric analysis, and its thermogravimetric mass residual rate is affected by the size of the test sample, the flow rate of the inert gas and oxygen. The influence of factors such as content
Therefore, the content of inorganic functional powder in functional polyester cannot be directly and accurately measured by thermogravimetric analysis

Method used

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  • A method for testing the content of inorganic functional powder in functional polyester
  • A method for testing the content of inorganic functional powder in functional polyester
  • A method for testing the content of inorganic functional powder in functional polyester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] (1) Dry the polyethylene terephthalate antibacterial fiber sample at a temperature of 130° C. to constant weight to obtain a dried polyethylene terephthalate antibacterial fiber sample;

[0061] (2) take by weighing the polyethylene terephthalate antibacterial fiber sample after the dry treatment of 4.0001g and the methyl alcohol that weight is 24.0003g join in the reaction tube that weight is 528.2615g;

[0062] (3) After the reaction tube is sealed with a sealing device, it is put into a heating device and heated to 330° C. so that the polyethylene terephthalate antibacterial fiber undergoes alcoholysis and depolymerization reaction in methanol reaching a supercritical state, and the reaction time is 30 minutes;

[0063] (4) After the reaction tube is taken out from the heating device and cooled to room temperature, the sealing device of the reaction tube is taken off;

[0064] (5) The reaction tube is placed in a vacuum heating device, and under the conditions of a t...

Embodiment 2

[0071] (1) Dry the polybutylene terephthalate conductive film sample at a temperature of 50° C. to constant weight to obtain a dry polybutylene terephthalate conductive film sample;

[0072] (2) taking by weighing the polybutylene terephthalate conductive film sample after the dry treatment of 6.5004g and the methyl alcohol that weighs 19.5003g joins in the reaction tube that weighs 528.2615g;

[0073] (3) After the reaction tube is sealed with a sealing device, it is put into a heating device and heated to 300° C. so that the polybutylene terephthalate conductive film undergoes alcoholysis and depolymerization reaction in methanol reaching a supercritical state, and the reaction time is 90 minutes;

[0074] (4) After the reaction tube is taken out from the heating device and cooled to room temperature, the sealing device of the reaction tube is taken off;

[0075] (5) The reaction tube is placed in a vacuum heating device, and the methanol that has not participated in the rea...

Embodiment 3

[0082] (1) drying the polytrimethylene terephthalate anti-ultraviolet fiber sample at a temperature of 100° C. to a constant weight to obtain a dried polytrimethylene terephthalate anti-ultraviolet fiber sample;

[0083] (2) Take by weighing the polytrimethylene terephthalate anti-ultraviolet fiber sample after the dry treatment of 1.3001g and the methanol that weighs 26.0003g and join in the reaction tube that weighs 528.2615g;

[0084] (3) After the reaction tube is sealed with a sealing device, it is put into a heating device and heated to 240° C. so that the polytrimethylene terephthalate anti-ultraviolet fiber undergoes an alcoholysis depolymerization reaction in methanol reaching a supercritical state, and the reaction time is 120 minutes;

[0085] (4) After the reaction tube is taken out from the heating device and cooled to room temperature, the sealing device of the reaction tube is taken off;

[0086] (5) The reaction tube is placed in a vacuum heating device, and unde...

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Abstract

The invention relates to the field of quantitative analysis of functional polyester, in particular to a method for testing the content of inorganic functional powder in functional polyester. The method for testing the content of inorganic functional powder in the functional polyester specifically comprises the steps that the functional polyester is depolymerized into dimethyl terephthalate, glycoland inorganic functional powder by a supercritical methanol depolymerization method; then a thermal gravimetric analyzer is used for testing a thermal weight loss mass residual rate of the functionalpolyester product depolymerized by the supercritical methanol in a heating temperature range of 284-400 DEG C; and finally, the content of the inorganic functional powder in the functional polyesteris calculated according to the thermal weight loss mass residual rate. According to the method for testing the content of inorganic functional powder in the functional polyester, the content of the inorganic functional powder in the functional polyester can be measured accurately, and the problem that an existing method cannot accurately measure the content of the inorganic functional powder in the functional polyester is solved. Moreover, the method for testing the content of inorganic functional powder in the functional polyester is simple to operate, does not need complicated instruments and equipment, and has accurate and reliable results and good reproducibility.

Description

technical field [0001] The invention relates to the field of quantitative analysis of functional polyester, in particular to a method for testing the content of inorganic functional powder in functional polyester. Background technique [0002] The preparation method of functional polyester is mainly the masterbatch method. The masterbatch method is to melt and mix functional powder and carrier resin to obtain functional masterbatch with high functional powder content, and then uniformly mix functional masterbatch melt and polyester melt to obtain functional polyester. Functional powders have antibacterial, anti-ultraviolet, antibacterial, electrical conduction, thermal conductivity, heat preservation, far-infrared, flame retardant, magnesium hydroxide, anti-neutron radiation, negative ions, fluorescence or magnetic functions, and most of them have good dispersion and heat resistance. of inorganic compounds. At present, there is no unified test method and standard for the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/04
CPCG01N5/04
Inventor 邱志成李鑫金剑钟淑芳国凤敏
Owner CHINESE TEXTILE ACAD
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