A procedure for precise determination of thermal stabilization reactions in carbon fiber precursors

Arbab, Shahram; Zeinolebadi, Ahmad

doi:10.1016/j.polymdegradstab.2013.09.014

Cited by 82 publications

(77 citation statements)

References 36 publications

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“…The thermal behavior of the pitch fibers dramatically changed after 450°C, showing a weight change of 25% at 500°C, which indicated the occurrence of dehydrogenation above 250°C [6]. The thermal behaviors of the stabilized samples were similar to those of the pitch fibers up to approximately 400°C.…”

Section: Thermal Characteristicsmentioning

confidence: 83%

“…The stabilization process is an important step in the production of high performance CFs [6] because the stabilization determines the mechanical properties of the CFs, such as the Young's modulus and tensile strength, after a high temperature heat-treatment process referred to as carbonization [7]. Stabilization provides the surface and interior of the fibers with oxygen functional groups to prevent melting of the fibers by maintaining a fibrous structure during carbonization.…”

Section: Introductionmentioning

confidence: 99%

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Stabilization of pitch-based carbon fibers accompanying electron beam irradiation and their mechanical properties

Park¹,

Ko²,

Jung³

et al. 2015

Carbon letters

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Carbon fibers are prepared by stabilizing pitch fibers accompanying electron beam (E-beam) irradiation. The carbon fibers pretreated by E-beam irradiation achieve a higher stabilization index than the carbon fibers that are only heat-stabilized. In addition, the carbon fibers subjected to E-beam irradiation in the stabilization step exhibit a comparable tensile strength to that of general purpose carbon fibers. The carbon fibers pretreated with an absorbed dose of 3000 kGy have a tensile strength of 0.54 GPa for a similar fiber diameter. Elemental, Fourier-transform infrared spectroscopy, and thermogravimetric analyses indicate that Ebeam irradiation is an efficient oxidation and dehydrogenation treatment for pitch fibers by showing that the intensity of the aliphatic C-H stretching and aromatic CH 2 bending (out-ofplane) bands significantly decrease and carbonyl and carboxylic groups form.

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Section: Thermal Characteristicsmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Stabilization of pitch-based carbon fibers accompanying electron beam irradiation and their mechanical properties

Park¹,

Ko²,

Jung³

et al. 2015

Carbon letters

View full text Add to dashboard Cite

show abstract

“…The main chemical group assignments for the extruded PAN fibers were identify and have the same polymeric structure of the PAN fibers obtained by wet and dry spinning process. Of particular interest is the assignment at 2240 cm -1 which is attributed to the C≡N stretching of acrylonitrile unit in the polymer chain and the bands at 2940 cm -1 (ν C−H in CH 2 ), 1452 cm -1 (δ C−H in CH 2 ) and 1370 cm-1 (δ C−H in CH), which are characteristics of aliphatic CH groups along the PAN backbone [17,18] . The weak absorption at 1626 cm-1 may be attributed to C=C (ν C=C ) [19] .…”

Section: Ft-ir Analysismentioning

confidence: 99%

“…Oxygen molecules also generate oxygen-bearing groups in the polymer backbone, such as OH, C=O and COOH. These groups promote intermolecular crosslinking of the polymer chains and provide greater stability to sustain high temperature carbonization treatment [17,18] .…”

Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

Thermal Stabilization study of polyacrylonitrile fiber obtained by extrusion

et al. 2015

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SbstractA low cost and environmental friendly extrusion process of the Polyacrylonitrile (PAN) polymer was viabilized by using the 1,2,3-propanetriol (glycerol) as a plasticizer. The characterization of the fibers obtained by this process was the object of study in the present work. The PAN fibers were heat treated in the range of 200 °C to 300 °C, which is the temperature range related to the stabilization/oxidation step. This is a limiting phase during the carbon fiber processing. The characterization of the fibers was made using infrared spectroscopy, thermal analysis and microscopy. TGA revealed that the degradation of the extruded PAN co-VA fibers between 250 °C and 350 °C, corresponded to a 9% weight loss to samples analyzed under oxidizing atmosphere and 18% when the samples were analyzed under inert atmosphere. DSC showed that the exothermic reactions on the extruded PAN co-VA fibers under oxidizing synthetic air was broader and the cyclization started at a lower temperature compared under inert atmosphere. Furthermore, FT-IR analysis correlated with thermal anlysis showed that the stabilization/oxidation process of the extruded PAN fiber were coherent with other works that used PAN fibers obtained by other spinning processes.

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“…Thus, it has been commonly used not only in the fabrication of clothing and soft furnishing fibers but also as an important precursor for the fabrication of carbon fibers having high mechanical strength and high conductivity [19][20][21]. In this respect, PAN can be a promising polymer precursor for the formation of electrically-conductive GCMs.…”

Section: Introductionmentioning

confidence: 99%

A simple PAN-based fabrication method for microstructured carbon electrodes for organic field-effect transistors

Jung

Kim

Jung

et al. 2015

Carbon

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A procedure for precise determination of thermal stabilization reactions in carbon fiber precursors

Cited by 82 publications

References 36 publications

Stabilization of pitch-based carbon fibers accompanying electron beam irradiation and their mechanical properties

Stabilization of pitch-based carbon fibers accompanying electron beam irradiation and their mechanical properties

Thermal Stabilization study of polyacrylonitrile fiber obtained by extrusion

A simple PAN-based fabrication method for microstructured carbon electrodes for organic field-effect transistors

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