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In the analysis of plastic materials, thermogravimetric analysis (TGA) is an important technical means to reveal the mass and thermal stability of materials at high temperatures. To ensure the accuracy and reliability of TGA analysis, it is essential to follow a set of best practices.
Calibration of the instrument is an indispensable step before TGA analysis. The calibration not only ensures the accuracy of the temperature readings, but also validates the proper operation of the quality measurement system. This process should follow the guidelines provided by the manufacturer and be carried out regularly to maintain the high accuracy of the instrument. Through calibration, data bias due to instrument errors can be minimized, providing a solid foundation for subsequent analysis.
The heating rate is an important factor affecting the repeatability of TGA analysis results. A well-controlled and consistent heating rate helps to obtain a clear thermal profile, which improves the accuracy of the analysis. Too fast heating may lead to thermal shock and affect the pyrolysis process of materials. However, too slow heating will prolong the analysis time and may introduce additional variables. Therefore, choosing the right heating rate is crucial. For most plastic materials, a moderate heating rate of about 10°C/ min is recommended, but the specific value should be adjusted according to the characteristics of the material under test.
Detailed recording of experimental conditions is the key to evaluating the reliability of TGA analysis results. This includes information on the sample preparation process, crucible selection, and test parameters. By maintaining a consistent record of experiments, it is easier to compare between different experiments, thereby identifying potential differences and trends. In addition, recording any unusual or unexpected behavior that occurs during the analysis can provide clues to identify potential problems and guide future experiments for improvement and optimization.
In summary, the best practice of TGA crucible in plastic material analysis involves instrument calibration, heating rate control, and recording of experimental conditions. By following these best practices, the accuracy and reliability of TGA analysis can be significantly improved, providing powerful data support for the development and application of plastic materials. In the future, as technology continues to advance and materials continue to evolve, the requirements for TGA analysis will become more stringent, so it will be important to continuously optimize and refine these best practices.