ASTM F2778

ASTM F2778 is the ASTM standard for measuring the percent crystallinity of polyetheretherketone (PEEK) polymers by specular reflectance Fourier transform infrared spectroscopy (R-FTIR). It provides a standardized way to evaluate crystallinity in PEEK materials, helping users compare results with greater consistency across testing programs. Because crystallinity can influence material behavior and product performance, this test method is useful for quality control, material verification, and technical assessment.

Purpose of ASTM F2778

The purpose of ASTM F2778 is to define a repeatable test method for determining the percent crystallinity of PEEK using R-FTIR measurement. As an ASTM standard, it supports consistent laboratory practice by describing how infrared reflectance data may be used to assess crystalline content in this polymer family. This makes the standard relevant when users need a reliable, documented approach for comparing samples, tracking processing effects, or evaluating whether a PEEK material aligns with expected material characteristics.

Common use cases of ASTM F2778

ASTM F2778 is commonly used in testing environments that work with PEEK polymers and need a standardized crystallinity measurement method. It may be applied in incoming material checks, production quality control, comparative studies, or product evaluation workflows where reflectance FTIR equipment is available. The standard is especially useful when teams need a practical, non-destructive analytical method for assessing polymer structure and maintaining consistent documentation across batches or suppliers.

Why ASTM F2778 matters

ASTM F2778 matters because percent crystallinity can affect how PEEK is understood, qualified, and used in manufacturing and engineering applications. A recognized ASTM method helps reduce variability between laboratories and supports clearer communication between buyers, suppliers, and testing teams. For procurement and compliance-related workflows, the standard can improve confidence in reported results, support quality control decisions, and provide a more dependable basis for comparing material performance indicators.

• PEEK crystallinity measurement by R-FTIR
• Specular reflectance-based analysis
• Standardized laboratory testing approach
• Material verification and quality control
• Useful for comparative polymer evaluation