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Structure–property relationship of carbon fibers derived from polyimide/polyacrylonitrile blends.
- Source :
-
High Performance Polymers . Mar2019, Vol. 31 Issue 2, p168-177. 10p. - Publication Year :
- 2019
-
Abstract
- A series of polyimide/polyacrylonitrile (PI/PAN) blend fibers with different PAN weight ratios were prepared through a two-step wet-spinning method and stabilization process and then were carbonized at 1500°C under high-purity nitrogen atmosphere, yielding in PI/PAN-derived carbon fibers. The effects of PAN content on the structures of the PI/PAN blend fibers were systematically investigated. The elemental composition, aggregation structure, carbon yields, and electrical properties of the PI/PAN-derived carbon fibers were also analyzed. The imidization degree and molecular orientation of the PI/PAN blend fibers increased first and then decreased with increasing PAN content, which directly affect the aggregation structures and properties of the corresponding PI/PAN-derived carbon fibers. As a consequence, the carbon fibers derived from PI/PAN-35% exhibited perfect graphite structure with a planar spacing d002 of 0.349 nm, high carbon content of 97.14%, and low electrical resistivity of 1.89 × 10−5 Ω·m, attributing to the high degree of orientation along the fiber axis and low value of φa/φc in the PI/PAN blend fibers. [ABSTRACT FROM AUTHOR]
- Subjects :
- *POLYIMIDES
*POLYACRYLONITRILES
*GRAPHITE
*ELECTRICAL resistivity
*NITROGEN
Subjects
Details
- Language :
- English
- ISSN :
- 09540083
- Volume :
- 31
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- High Performance Polymers
- Publication Type :
- Academic Journal
- Accession number :
- 134098416
- Full Text :
- https://doi.org/10.1177/0954008317753872