The performance differences of the carbon fibers prepared from naphthalene-based (SD) and petroleum-based (MP) mesophase pitch were studied.The microstructures,mechanical properties and thermal conductivity of the carbon fibers were characterized by SEM,XRD,vibrodyn tensile tester and micro ohmmeter.The results shown that the SD pitch had 126ppm ash content and about 10% isotropic components.The tensile strength,Young's modulus and thermal conductivity of the SD carbon fibers were 1.13GPa,720GPa and 790W/(m·K),respectively.The MP pitch had 28ppm ash content and 100% mesophase content.The tensile strength,Young's modulus and thermal conductivity of the MP carbon fibers were 2.21GPa,821GPa and 848W/(m·K),respectively.The reason why the MP carbon fibers had better properties than the SD carbon fibers was that it had larger graphite microcrystalline size,higher graphitization degree and higher orientation degree.
Yu Yang, Wu Huang, Huang Dong, Wu Xiao, Ye Chong
. Comparison on the property of the carbon fibers with naphthalene-based and the petroleum-based mesophase pitch[J]. New Chemical Materials, 2021
, 49(8)
: 70
-73
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.08.015
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