Term: spacer
https://doi.org/10.1351/goldbook.ST06873

Definition:
A flexible segment used to link successive mesogenic units in the molecules of MCPLCs (main-chain polymer liquid crystals) or to attach mesogenic units as side-groups onto the polymer backbone of SGPLCs (side-group polymer liquid crystals).

Related Terms:
1) main-chain polymer liquid crystals (http://doi.org/10.1351/goldbook.MT06869).
2) mesogenic units (http://doi.org/10.1351/goldbook.MT06858).
3) side-group polymer liquid crystals (http://doi.org/10.1351/goldbook.ST06868).
4) backbone (http://doi.org/10.1351/goldbook.B00574).

Source: PAC, 2002, 74, 493. 'Definitions of basic terms relating to polymer liquid crystals (IUPAC Recommendations 2001)' on page 504 (https://doi.org/10.1351/pac200274030493)

Citation: 'spacer' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.ST06873

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