Structural features of polyacrylonitrile-based carbon fibers
نویسندگان
چکیده
منابع مشابه
FABRICATION OF CARBON FIBERS FROM COMMERCIAL WET SPIN POLYACRYLONITRILE FIBERS
Carbon fibers are fabricated from different materials such as special polyacrylonitrile (PAN) fibers, cellulose fibers and pitch. But PAN fibers are recognized as the most widely used precursor for the present-day manufacture of carbon fibers. The process of fabrication carbon fibers from special PAN fibers is composed of two steps including oxidative stabilization at low temperature and carbon...
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Aligning multiwall carbon nanotubes (MWNTs) with the direction of load is desirable for maximizing tensile reinforcement in composites. This has been accomplished by spinning composite fibers containing MWNTs[1]. The shear and elongational flow fields inherent to fiber processing cause the MWNTs to align with the fiber axis. Efficient stress transfer from the matrix to the MWNTs is also a cruci...
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! " # $ @ %&' ( ) * " + , * -" + , " ( ) . / %0' " *1 ) ( # , 23 4 5 63 3"3 ) , 1 # 3 3 7 77 89* : ; 6 3 6 -" <=3) 3 1 4" + > " ( ) > * # 3 ) 61 *1 1 4 , 1 # > 1 9 ? 6 3# "63 ,@ AA $ 89* : %0' ( 3 44 66; *1 ) 4? 1 4 / 3 6 4 *#63 " 63 3"3 ) , 1 # " A7 A %&&' , 6 B B 6 6"== 3 4 # 3 C)) 1 ) ? > 6 1 8 D D D E$A: 3 1 6 1 4 3 5 1 C) ) 1 ) *1 3 ) 1 > 6 1 85 FE D D D A 4 5 FE D 7D D : *"== 3 3 > 1 9 ? ...
متن کاملStructural Evolution of Polyacrylonitrile Fibers in Stabilization and Carbonization
The effect of structural evolution polyacrylonitrile (PAN) on mechanical properties was investigated in stabilization and carbonization. PAN spun fibers were stabilized in a convection oven with a constant tension for various times at 250 ̊C. Fourier Transform Infrared spectroscopy (FTIR) and gel fraction results suggested that intra and intermolecular stabilization reactions occurred simultaneo...
متن کاملDrawing dependent structures, mechanical properties and cyclization behaviors of polyacrylonitrile and polyacrylonitrile/carbon nanotube composite fibers prepared by plasticized spinning.
Drawing to change the structural properties and cyclization behaviors of the polyacrylonitrile (PAN) chains in crystalline and amorphous regions is carried out on PAN and PAN/carbon nanotube (CNT) composite fibers. Various characterization methods including Fourier transform infrared spectroscopy, differential scanning calorimetry, X-ray diffraction and thermal gravimetric analysis are used to ...
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ژورنال
عنوان ژورنال: Journal of Materials Science
سال: 2011
ISSN: 0022-2461,1573-4803
DOI: 10.1007/s10853-011-5872-2