The effect of commercial polyacrylonitrile fibers characterizations on the produced carbon fibers properties

Sedghi, Arman; Eslami‐Farsani, Reza; Shokuhfar, Ali

doi:10.1016/j.jmatprotec.2007.06.052

Cited by 87 publications

(55 citation statements)

References 9 publications

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“…During this process, PAN undergoes a number of physical and chemical changes which converts the linear PAN molecular chains to an aromatic ladder structure suitable for further heat treatment (carbonization) and conversion to carbon fibers. Although the chemistry of stabilization process is complex, this stage consists basically of exothermic chemical reactions, including cyclization of nitrile groups, dehydrogenation, oxidation and crosslinking among the polymer chains [15,16] .…”

Section: Introductionmentioning

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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Section: Introductionmentioning

confidence: 99%

Thermal Stabilization study of polyacrylonitrile fiber obtained by extrusion

et al. 2015

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“…The cyclization reactions are initiated through a free radical mechanism, leading to a large amount of heat to be released in a shorter period of time. This results in the breakage of molecular chains, making the reaction difficult to control in the conversion of PAN polymer into a thermally oxidized polymer [27,28,29] . On the other hand, the exothermic event of the PAN AN/VDC copolymers during heat treatment is broader and proceeds gradually.…”

Section: Thermal Behavior Of the Pan An/vdcmentioning

confidence: 99%

Synthesis and Thermal Behavior of Polyacrylonitrile/Vinylidene Chloride Copolymer

et al. 2014

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Polyacrylonitrile fiber encompasses a broad range of products based on acrylonitrile (AN) which is readily copolymerized with a wide range of ethylenic unsaturated monomers giving rise to polymers with different characteristics and applications. Such products can be designed for cost-effective, flame and heat resistant solutions for the textile industry, aircraft and automotive markets. In the present work acrylonitrile was copolymerized with vinylidene chloride (VDC) by conventional suspension polymerization process via redox system, with an initial content of 10%/mass of the VDC monomer. The copolymer average molecular weight was obtained by Gel Permeation Chromatography (GPC) and by intrinsic viscosity analysis. To control the polymerization process continuously, qualitative and quantitative analysis of the chloride content in the PAN AN/VDC copolymer structure was accomplished by using X-ray fluorescence and potentiometric titration techniques. A good correlation was found between these two techniques, leading to a straightforward verification of VDC in the polymer structure. The thermal behavior of PAN AN/VDC copolymer was performed by Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA). The results showed that VDC monomers exhibited a nearly stoichiometric reaction with acrylonitrile, copolymerizing about 90% of its initial mass. VDC changed significantly the polyacrylonitrile thermal behavior, decreasing the polymer degradation temperature by about 40-50°C.

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“…As a consequence of the increasing use of CFs in wind power systems and in the specialist industrial applications sector, the demand in the coming five years is expected to establish CF in the mass market. However, due to the high cost of their petroleum-based precursors and associated processing costs, CF remains fairly expensive [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Effects of cross-linking methods for polyethylene-based carbon fibers: review

Kim¹,

Lee²,

An³

et al. 2015

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In recent decades, there has been an increasing interest in the use of carbon fiber reinforced plastic (CFRP) in aerospace, renewable energy and other industries, due to its low weight and relatively good mechanical properties compared with traditional metals. However, due to the high cost of petroleum-based precursors and their associated processing costs, CF remains a specialty product and as such has been limited to use in high-end aerospace, sporting goods, automotive, and specialist industrial applications. The high cost of CF is a problem in various applications and the use of CFRP has been impeded by the high cost of CF in various applications. This paper presents an overview of research related to the fabrication of low cost CF using polyethylene (PE) control technology, and identifies areas requiring additional research and development. It critically reviews the results of cross-linked PE control technology studies, and the development of promising control technologies, including acid, peroxide, radiation and silane cross-linking methods.

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The effect of commercial polyacrylonitrile fibers characterizations on the produced carbon fibers properties

Cited by 87 publications

References 9 publications

Thermal Stabilization study of polyacrylonitrile fiber obtained by extrusion

Thermal Stabilization study of polyacrylonitrile fiber obtained by extrusion

Synthesis and Thermal Behavior of Polyacrylonitrile/Vinylidene Chloride Copolymer

Effects of cross-linking methods for polyethylene-based carbon fibers: review

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