Title: carbon fibres type LM
Long Title: IUPAC Gold Book - carbon fibres type LM
DOI: 10.1351/goldbook.C00836
Status: current

Definition
Carbon fibres type LM (low modulus) are carbon fibres with isotropic structure, tensile modulus values as low as $\pu{10\%}$ of the \(C_{11}\) values of the graphite single crystal, and low strength values.

Note
The term carbon fibres type LM is sometimes used for various types of isotropic carbon fibres known as pitch-based or rayon-based carbon fibres that have not been subjected to hot-stretching. Such fibres are not used for reinforcement purposes in high-performance composites.

Related Terms
- carbon fibres: https://goldbook.iupac.org//terms/view/C00831
- graphite: https://goldbook.iupac.org//terms/view/G02684
- isotropic: https://goldbook.iupac.org//terms/view/I03353
- isotropic carbon: https://goldbook.iupac.org//terms/view/I03354
- pitch-based: https://goldbook.iupac.org//terms/view/P04678
- rayon-based carbon fibres: https://goldbook.iupac.org//terms/view/R05161

Source
- PAC, 1995, 67, 473. 'Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)' on page 482 (https://doi.org/10.1351/pac199567030473)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/C00836/html
- json: https://goldbook.iupac.org/terms/view/C00836/json
- xml: https://goldbook.iupac.org/terms/view/C00836/xml

Citation: Citation: 'carbon fibres type LM' 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.C00836
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Accessed: 2026-04-19T05:41:26+00:00