ASTM D2238 is the standard test methods document for measuring the absorbance of polyethylene due to methyl groups at 1378 cm−1. It provides a consistent way to evaluate a specific infrared absorption feature associated with polyethylene, helping users compare material behavior in a controlled and repeatable manner. For laboratories, quality teams, and buyers working with polyethylene, this standard supports more reliable testing and clearer material characterization.

What is ASTM D2238?

This ASTM standard defines test methods for determining absorbance linked to methyl groups in polyethylene at 1378 cm−1. In practical terms, it focuses on a targeted spectral measurement that can be used to assess a characteristic of the polymer through infrared-based analysis. ASTM D2238 is useful when a consistent technical reference is needed for comparing samples, supporting product evaluation, or maintaining a common testing approach across materials and laboratories.

Where is ASTM D2238 used?

This standard is commonly used in polymer testing environments where polyethylene needs to be evaluated by a specific absorbance measurement. It is relevant in laboratory workflows that use infrared spectroscopy or related analytical equipment to assess material characteristics. ASTM D2238 may be applied in quality control, product development, and incoming material review when a repeatable method is needed to support comparison of polyethylene samples.

Why is ASTM D2238 important?

ASTM D2238 matters because it helps standardize how a defined absorbance feature of polyethylene is measured. That consistency supports better comparison between tests, reduces ambiguity in reporting, and helps organizations align on a common technical method. For procurement, compliance, and quality control, using a recognized ASTM standard can improve confidence in results and help limit variation across different laboratories or production batches.

• Polyethylene absorbance measurement
• Infrared spectral evaluation at 1378 cm−1
• Repeatable testing method for material comparison
• Quality control and laboratory use