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Method for detecting bio-based degradable material poly (butylene adipate-co-terephthalate)

A technology of butylene terephthalate and polyadipic acid, which is applied in the field of analysis and detection, can solve problems such as inability to quantify, and achieve the effect of simple operation and accurate results

Active Publication Date: 2022-01-21
SHANDONG INST FOR PROD QUALITY INSPECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the inventors found that: the current pyrolysis GC-MS technology uses solid sample injection, which can only qualitatively determine polymers such as PBAT, but cannot quantify

Method used

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  • Method for detecting bio-based degradable material poly (butylene adipate-co-terephthalate)
  • Method for detecting bio-based degradable material poly (butylene adipate-co-terephthalate)
  • Method for detecting bio-based degradable material poly (butylene adipate-co-terephthalate)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: Quantitative / qualitative detection of samples

[0037] The present invention adopts a production enterprise to provide 4 types of biodegradable plastic products containing PBAT, namely: I, biodegradable film, II biodegradable lunch box, II biodegradable shopping bag, IV biodegradable express packaging film represent the most widely used and most For representative degradable materials, three batches of samples were selected for each category, and the specific information is shown in Table 1 below.

[0038] Table 1 Experimental sample information

[0039]

[0040] 1) Preparation of PBAT standard solution

[0041]Because PBAT has good solubility in dichloromethane solvent, the present invention adopts dichloromethane as solvent preparation PBAT standard solution (1000mg / L), draws respectively 0, 0.1, 1, 10mL standard mother liquor in 100mL volumetric flask, uses two Chloromethane was fixed to volume and tested on the machine.

[0042] 2) Preparation of...

Embodiment 2

[0056] Embodiment 2: accuracy, precision experiment of method

[0057] The preparation and testing method of the test solution are the same as in Example 1.

[0058] The recovery rate and relative standard deviation of the blank simulant solution (dichloromethane solution) were spiked. The recovery rate and precision test results of the method are shown in Table 5.

[0059] Table 5 Accuracy and precision experiments

[0060]

Embodiment 3

[0061] Example 3: Comparison of pyrolysis GC-MS technology and nuclear magnetic resonance (hydrogen spectrum) method

[0062] The preparation and testing method of the test solution are the same as in Example 1.

[0063] In order to verify the reliability of the method, the present invention selects a biodegradable shopping bag (marked as PBAT+CaCO 3 ) 3 batches of products were tested, and the results are shown in Table 6. From the test results, it can be seen that the relative deviation of the two test methods at the 20% level of PBAT content is within 10%.

[0064] Table 6 Comparison of results of different test methods

[0065]

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Abstract

The invention belongs to the field of analysis and detection and relates to a method for detecting a bio-based degradable material poly (butylene adipate-co-terephthalate), which is used for carrying out qualitative and / or quantitative analysis on the poly (butylene adipate-co-terephthalate) (PBAT) by adopting a thermal cracking gas chromatography-mass spectrometry method. According to the method provided by the invention, the content of PBAT in the degradable plastic product can be qualitatively and quantitatively detected, and a complex pretreatment process with harsh conditions and long time consumption is not needed. The method provided by the invention is simple, convenient, rapid and accurate, and is suitable for qualitative and quantitative rapid screening and detection of the PBAT cracking component of the degradable material. The detection method is simple and easy to operate and accurate in result.

Description

technical field [0001] The invention belongs to the field of analysis and detection, and in particular relates to a rapid detection method of polyadipate / butylene terephthalate (PBAT), a bio-based degradation material. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Polybutylene adipate / terephthalate (PBAT) is a thermoplastic biodegradable plastic. It is a copolymer of butylene adipate and butylene terephthalate. It has the characteristics of both PBA and PBT. It not only has good ductility and elongation at break, but also has good heat resistance and impact properties; in addition, it also has excellent biodegradability, and is currently very active in the research of b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/14G01N30/30G01N30/72G01N30/86
CPCG01N30/02G01N30/14G01N30/30G01N30/72G01N30/8675
Inventor 李林林姜传兴李元月齐永润吴艳凤孔祥坤
Owner SHANDONG INST FOR PROD QUALITY INSPECTION