Plastic composition analysis test items and test methods
Date：2025-06-11 09:48:02 Classification
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Plastic component analysis testing is a complex process involving multiple test items and methods. The following are the main test items and test methods for plastic component analysis:
I. Test items
1. Ash content: measure the content of inorganic components in plastics.
2. Glass fiber content: measure the content of glass fibers in plastics.
3. Infrared analysis: determine the chemical composition of plastics through infrared spectroscopy.
4. Thermogravimetric analysis: analyze the thermal stability of plastic samples by measuring the mass change during heating.
5. Moisture content: measure the moisture content in plastics.
6. Qualitative analysis of the main components of plastics: determine the main components of plastics.
7. Quantitative analysis of the main components of plastics: measure the content of the main components in plastics.
8. Quantitative analysis of all components of plastics: measure the content of all components in plastics.
II. Test methods
1. Fourier transform infrared spectrometer (FTIR):
- Determine the chemical composition of plastics by detecting infrared radiation of specific wavelengths absorbed by the tested substance.
- Suitable for qualitative and quantitative analysis.
2. Pyrolysis/Gas Chromatography/Mass Spectrometry (PY-GC-MS):
- Pyrolysis of plastic samples, and analysis of their components by gas chromatography and mass spectrometry.
- Suitable for qualitative and quantitative analysis of complex components.
3. High Performance Liquid Chromatography (HPLC):
- Used to separate and analyze different components in plastics.
- Suitable for quantitative analysis.
4. Thermogravimetric Analyzer (TGA):
- Analyze the thermal stability of plastic samples by measuring the mass change during heating.
- Suitable for thermal stability analysis and component analysis.
5. Scanning Electron Microscope/X-ray Energy Dispersive Spectrometer (SEM/EDS):
- Used to observe the microstructure and elemental composition of plastic samples.
- Suitable for microstructure analysis and elemental analysis.
6. Ultraviolet spectrophotometer (UV-Vis):
- Used to measure the absorbance of plastic samples in the UV-visible region.
- Suitable for qualitative and quantitative analysis.
3. Test standards
The infrared analysis test of plastic composition analysis needs to follow certain test standards to ensure the accuracy and reliability of the test results. Some relevant test standards include:
- ASTME1252-98(2013)e1: "Quantitative Analysis of Main Components of Polymer Materials"
- GB/T7764-2001: "Infrared Spectroscopy for Rubber Identification"
- GB/T9722-2006: "General Rules for Gas Chromatography of Chemical Reagents"
- ISO7270-2005: "Gas Chromatographic Analysis of Rubber by Pyrolysis"
- ASTMD5630-2013: "Standard Test Method for Ash Content in Plastics"
- EPA6010C-2007: "Inductively Coupled Plasma Atomic Emission Spectrometry"
- GB/T17359-2012: "General Rules for Quantitative Analysis of X-ray Spectroscopy by Electron Probe and Scanning Electron Microscope"
IV. Summary
Infrared analysis of plastic composition is a complex process involving a variety of test methods and standards. By following these standards and methods, the accuracy and reliability of test results can be ensured, thus providing important data support for quality control and research and development of plastics.
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