Title: hard-segment phase domain
Long Title: IUPAC Gold Book - hard-segment phase domain
DOI: 10.1351/goldbook.HT07293
Status: current

Definition
Phase domain of microscopic or smaller size, usually in a block, graft, or segmented copolymer, comprising essentially those segments of the polymer that are rigid and capable of forming strong intermolecular interactions.

Note
Hard-segment phase domains are typically of \(2{-}15\ \rm{nm}\) linear size.

Related Terms
- Phase domain: https://goldbook.iupac.org//terms/view/PT07286
- block: https://goldbook.iupac.org//terms/view/B00682
- intermolecular: https://goldbook.iupac.org//terms/view/I03098
- segmented copolymer: https://goldbook.iupac.org//terms/view/ST07295

Source
- PAC, 2004, 76, 1985. 'Definition of terms related to polymer blends, composites, and multiphase polymeric materials (IUPAC Recommendations 2004)' on page 2002 (https://doi.org/10.1351/pac200476111985)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/HT07293/html
- json: https://goldbook.iupac.org/terms/view/HT07293/json
- xml: https://goldbook.iupac.org/terms/view/HT07293/xml

Citation: Citation: 'hard-segment phase domain' 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.HT07293
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Accessed: 2026-05-09T13:42:12+00:00