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High Performance Polymers, 2nd Edition
book

High Performance Polymers, 2nd Edition

by Johannes Karl Fink
July 2014
Intermediate to advanced
440 pages
21h 59m
English
William Andrew
Content preview from High Performance Polymers, 2nd Edition
312 HIGH PERFORMANCE POLYMERS
13.5.5 Carbon Fiber Precursors
Poly(m-phenylene isophthalamide) (PMIA) and
other aramids have beenproposed as precursor for acti-
vated carbon materials [87]. These materials exhibit
a very homogeneous micropore size. This property
makes them usable as adsorbents, molecular sieves,
catalysts, or electrodes.
PMIA-derived carbon fibers can be activated by car-
bon vapor deposition of benzene. The activated carbon
fibers are suitableas molecularsieves forair separation
[88]. Carbon fibers can be obtained from the aramid
by pyrolysis at 750–850
C. Which may take place in
Ar or CO
2
.
The fiber may be pre-impregnated with H
3
PO
4
.
Steam, CO
2
,andH
3
PO
4
serve as activators. The acti-
vation converts the amide groups in the polymer pre-
cursor ...
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Publisher Resources

ISBN: 9780323312226