Isotropicpitch-based fibers produced from coal tar pitch with the melt-blowing method were carbonized ... The in-plane crystallite size (La) of the carbonized pitchfiber from X-ray diffraction increased monotonously ... For the carbonized pitch powder without stabilization, structural ordering perpendicular to the graphene
In this study, we tried to prepare an isotropic spinnable pitch which can be useful to prepare the general ... The carbon fiber derived from the pressurized distillation spinnable pitch by carbonization at 800ºC ... purpose carbon fiber through the co-carbonization of biomass tar with ethylene bottom oil under two
Isotropic pitch fibers were stabilized and carbonized for preparing carbon fibers. ... , indicating the limit of developing an ordered structure of isotropicpitch-based carbon fibers. ... Stabilized fibers were carbonized at 1000, 1500, and 2000℃ in a furnace under a nitrogen atmosphere.
Isotropic pitch fibers were stabilized and carbonized for preparing carbon fibers. ... , indicating the limit of developing an ordered structure of isotropicpitch-based carbon fibers. ... Stabilized fibers were carbonized at 1000, 1500, and 2000°C in a furnace under a nitrogen atmosphere.
A petroleum-based isotropic pitch fiber spun by melt-blown method was oxidized in air flow at various ... The oxidized pitchfiber obtained was tested for its infusibility and its elemental composition during
Isotropicpitch-based fibers produced from coal tar pitch with the melt-blowing method were
carbonized ... The in-plane
crystallite size (La) of the carbonized pitchfiber from X-ray diffraction increased monotonously ... For the carbonized pitch powder without stabilization, structural
ordering perpendicular to the graphene
(CTP) to obtain a spinnable precursor pitch for carbon fiber. ... spinning and carbon fiber properties were compared to those of air blowing and thermal treated CTP. ... , thermal treatment accompanied with different acid treatments was applied to a commercial coal tar pitch
(CTP) to obtain a spinnable precursor pitch for carbon fiber. ... (CTP) to obtain a spinnable precursor pitch for carbon fiber.In the case of thermal treatment only, ... spinning
and carbon fiber properties were compared to those of air blowing and thermal treated CTP.
Two types of carbon fiber based high modulus- and isotropic-pitch were exposed to isothermal oxidation ... Therefore, it was found that the pitch based carbon fiber shows sigmoidal characteristic when it is oxidized ... equation was introduced f=1--(-atb) and the constant b was obtained in the range of 1.02~1.68 for the isotropic
Petroleum based isotropicpitch was spun into short fiber by melt-blown spinning technology. ... Also, the fiber diameter was strongly dependent on the throughput rate of the pitch and jet speed of ... The processing parameters chosen were air velocity, die temperature, and throughput rate of the pitch
Isotropicpitch-based carbon fiber was isothermally activated in CO₂ atmosphere. ... Isotropicpitch-based carbon fiber was isothermally activated in CO₂ atmosphere. ... Structural parameters of the isotropic carbon fibers and activated carbon fibers (ACFs) were evaluated
Coal tar pitch was chmically modified 10wt% benzoquinone(BQ) to raise the softening point of isotropic ... Coal tar pitch was chmically modified 10wt% benzoquinone(BQ) to raise the softening point of isotropic ... pitch pre-cursor and the precursor was melt-spun into fibers, stabilizd, carbonized and activated with
Short pitchfibers were prepared from petroleum based isotropic precursor pitch by melt-blown technology ... The pitchfibers were stabilized in oxidizing condition, followed by steam activations at various conditions ... The fiber surface and pore structures of the activated carbon fibers (ACFs) were respectively characterized
the mechanical properties to those of round type mesophase pitchfiber (R-MPCF) and C-type isotropic ... pitchfiber (C-iPCF). ... The C-type mesophase pitch-based carbon fiber (C-MPCF) was prepared throuch C-type spinnerette and compared
The carbon contents and the crystallinities of isotropicpitch-based carbon fibers were 86.8~93.8 wt% ... Pitch-based carbon fiber tows were prepared from naphtha cracking bottom oil by reforming and carbonization ... by measuring the surface temperature increase of fibers.
The surface treatment of C-type isotropicpitch-based carbon fiber was out by anodic oxidation in 5wt ... The surface treatment of C-type isotropicpitch-based carbon fiber was out by anodic oxidation in 5wt ... The changes of fiber surface and carbon fiber/ABS resin composites werw charaterized by SEM, XPS and
mechanical properties to those of round type mesophase pitsh fiber anf C-type isotropic pitch fiber. ... mechanical properties to those of round type mesophase pitsh fiber anf C-type isotropic pitch fiber. ... The C-Type mesophase pitch-based carbon fiber was prepared throuch C-tyoe spinnerette and comparedthe
Isotropicpitch-based carbon fiber was isothermally activated in CO2 atmosphere. ... Structural parameters of the isotropic carbon fibers and activated carbon fibers (ACFs) were evaluated ... The d002 and La of the carbon fibers were measured to be 4.04 a and 23.6 a and those of ACFs were 4.29
After spinning, an isotropic carbon fiber of 25μm diameter was obtained via oxidation and craboniation ... Spinnable isotropicpitch with the softening point of 200℃ and the toluene insolubles of 36wt% was obtained ... residual heavy oils form a NCC(naphtha cracking center), were heat-treated to produce the precursor-pitch
The surface treatment of C-type isotropicpitch-based carbon fiber was carried out by anodic oxidation ... The changes of fiber surface and carbon fiber/ABS resin composites were characterized by SEM, XPS and ... Tensile strength, flexural strength and modulus of carbon fiber/ABS composites were also enhanced.