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D5576-00 – Standard Test Method Technical Guide
📐 Scope and Terminology Framework
ASTM D5576-00(2021) outlines a comprehensive standard practice for utilizing infrared spectrophotometry (FT-IR) to characterize the molecular architecture of polyolefins and polyolefin copolymers. The standard’s primary focus, as defined in Section 1.1, is the identification and quantification of branch types and degrees of unsaturation. While optimized for polyolefins, the practice is adaptable to other polymer systems with proper modification.
The standard integrates key terminology from the plastics industry, relying on ASTM D883 (Terminology Relating to Plastics) and D1600 (Abbreviated Terms). Units and symbols follow the guidelines set forth in Terminology E131 and IEEE/ASTM SI-10. This international standard adheres to the WTO TBT principles for international standardization.
⚠️ Editorial Update & Reapproval: This standard was reapproved in 2021 with an editorial update (ε1) to