Term: bulk mesophase
https://doi.org/10.1351/goldbook.B00754

Definition:
A continuous anisotropic phase formed by coalescence of mesophase spheres. Bulk mesophase retains fluidity and is deformable in the temperature range up to about 770 K, and transforms into green coke by further loss of hydrogen or low-molecular-weight species. This bulk mesophase can sometimes be formed directly from the isotropic pitch without observation of intermediate spheres.

Related Terms:
1) mesophase (http://doi.org/10.1351/goldbook.M03849).
2) fluidity (http://doi.org/10.1351/goldbook.F02450).
3) weight (http://doi.org/10.1351/goldbook.W06668).
4) isotropic (http://doi.org/10.1351/goldbook.I03353).
5) green coke (http://doi.org/10.1351/goldbook.G02697).
6) pitch (http://doi.org/10.1351/goldbook.P04677).

Source: PAC, 1995, 67, 473. 'Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)' on page 478 (https://doi.org/10.1351/pac199567030473)

Citation: 'bulk mesophase' 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.B00754

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