Title: homogeneous polymer blend
Long Title: IUPAC Gold Book - homogeneous polymer blend
DOI: 10.1351/goldbook.HT07582
Status: current

Definition
Polymer blend that is a single-phase structure.

Notes
1) Modified from previous definition. The definition proposed here is preferred because it emphasizes the requirement for homogeneity over miscibility.
2) For a polymer blend to be miscible it must obey the thermodynamic criteria of miscibility.
3) Miscibility is sometimes assigned erroneously on the basis that a blend exhibits a single \(T_{\rm{g}}\) or is optically clear.
4) The miscible system can be thermodynamically stable or metastable.
5) For components of chain structures that would be expected to be miscible, miscibility may not occur if molecular architecture is changed, e.g., by crosslinking.

Related Terms
- Miscibility: https://goldbook.iupac.org//terms/view/MT07230
- Polymer blend: https://goldbook.iupac.org//terms/view/P04736
- crosslinking: https://goldbook.iupac.org//terms/view/CT07136
- metastable: https://goldbook.iupac.org//terms/view/M03872
- stable: https://goldbook.iupac.org//terms/view/S05900

Source
- PAC, 2007, 79, 1801. 'Definitions of terms relating to the structure and processing of sols, gels, networks, and inorganic-organic hybrid materials (IUPAC Recommendations 2007)' on page 1817 (https://doi.org/10.1351/pac200779101801)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/HT07582/html
- json: https://goldbook.iupac.org/terms/view/HT07582/json
- xml: https://goldbook.iupac.org/terms/view/HT07582/xml

Citation: Citation: 'homogeneous polymer blend' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.HT07582
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Accessed: 2026-06-04T02:13:02+00:00