Identification method of polyester amide

A polyester amide and identification method technology, applied in the field of analysis and detection, can solve problems such as insignificant changes and inaccurate detection results, achieve high detection sensitivity, true and effective detection results, and ensure normal progress

Active Publication Date: 2019-05-31
CATHAY R&D CENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although infrared detection can be used to determine the formation of polyester amide to a certain extent, due to the limitations of the method, infrared detection does not change significantly and the detection results are not accurate

Method used

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  • Identification method of polyester amide
  • Identification method of polyester amide
  • Identification method of polyester amide

Examples

Experimental program
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Embodiment

[0074] The present embodiment provides a kind of identification method of polyester amide, and it comprises the following steps:

[0075] (1) Under the protection of nitrogen or inert gas, add dihydric alcohol, terephthalic acid and / or its derivatives into the reaction container for esterification reaction, then add 15% PA56 salt, continue the reaction, and take out the 0.2 g of reaction product at a certain stage in the reaction process;

[0076] (2), the reaction product obtained in step (1) is placed in a vacuum oven and dried at 120° C. for 4 hours, as a sample to be tested;

[0077] (3), the test sample obtained in step (2) is completely dissolved in deuterated trifluoroacetic acid, and the deuterated trifluoroacetic acid solution of the test sample is made, so that the concentration of the test sample in the solution reaches 100mg / mL .

[0078] (4), adopt the Bruker Avance 400 instrument to carry out the 1H-13C HMBC detection of 1H, 13C to the deuterated trifluoroaceti...

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Abstract

The invention provides a polyesteramide identification method. According to the method, when a deuterated trifluoroacetic acid solution of a sample to be tested is detected to contain a structure A, a structure B, a structure C and a structure D at the same time, it is judged that the deuterated trifluoroacetic acid solution of the sample to be tested contains polyesteramide. The structure A, the structure B, the structure C and the structure D are shown in the description. By the adoption of the method, whether the deuterated trifluoroacetic acid solution of the sample to be tested contains polyesteramide can be detected quickly and accurately, so that research personnel can easily learn which reaction stage polyesteramide is generated in or whether products of an unknown reaction include polyesteramide, and then research basis is laid for follow-up research and development work.

Description

technical field [0001] The invention belongs to the field of analysis and detection, and relates to an identification method of polyester amide. Background technique [0002] Polyester amides are polymers containing ester chains and amide bonds in the main molecular chain. Polyester amide is divided into linear polyester amide and cross-linked polyester amide. Linear polyester amide is mainly used as clothing and decorations for imitation silk; cross-linked polyester amide can be used as plastic or reinforced plastic for machinery and Components in the field of electrical appliances. [0003] In the prior art, the research on polyester amide mainly focuses on the preparation, modification and further processing of polyester amide. The preparation method of polyester amide is generally to carry out esterification reaction of dibasic alcohol and dibasic acid to obtain an intermediate product, which is subjected to polycondensation reaction with dibasic amine to obtain polyes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N24/08G01N1/44
Inventor 王逸伦秦兵兵郑毅刘修才其他发明人请求不公开姓名
Owner CATHAY R&D CENT CO LTD
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