Carbon fibres type
IM (intermediate modulus) are related to
carbon fibres type HT
because of the comparable values of tensile strength, but are characterized by greater stiffness (
Young's modulus up to approximately 35% of the theoretical
value).
Note:
The tensile modulus (
Young's modulus) varies between
ca.
and
,
but the disposition of the boundaries is somewhat arbitrary. The relatively high ratio of tensile strength to tensile modulus, typically above
, in carbon fibres type
IM, in spite of an increase of
Young's modulus, requires a further increase of strength, which is achievable by a significant reduction of the monofilament diameter down to about
.
Such small filament diameters are typical of carbon fibres type
IM.
Source:
PAC, 1995, 67, 473
(Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995))
on page 482
Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A.Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8.
doi:10.1351/goldbook.
