Untitled

Serkov, A. T.; Budnitskii, G. A.; Radishevskii, M. B.; Медведев, В. А.; Zlatoustova, L. A.

doi:10.1023/a:1024838312261

Cited by 22 publications

(9 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…PAN‐based carbon fiber is widely used in many industries such as aviation, aerospace, sporting goods, and construction. Properties of PAN precursor fiber are critical for yielding high‐quality PAN‐based carbon fiber 1. In preparing PAN solutions for manufacturing PAN precursor fibers, the first issue is the solution spinnability.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigating the spinnability in the dry‐jet wet spinning of PAN precursor fiber

Tan

Chen

Pan

et al. 2008

J of Applied Polymer Sci

View full text Add to dashboard Cite

The spinnability of a spinning solution using DMSO as the solvent was investigated for dry-jet wet spinning of PAN precursor fiber. Among many variables responsible for spinnability, the coagulating conditions, the air gap length, the nonsolvent content in spinning solution, and the spinning temperature have been viewed as the key factors, and they were investigated in this study. It was found however, unlike in the wet spinning, the spinnability in dry-jet wet spinning process was barely influenced by the coagulating conditions, likely attributable to the existence of the air gap. However, the spinnability worsened when the air gap was longer than 30 mm. The quality of the spinning solution deteriorated with the increasing water content in it. The spinnability improved when the spinning temperature was maintained between 60 and 728C and turned down once the temperature was over 728C. The experimental results indicated that all the factors should be comprehensively considered to ensure good spinnability in dry-jet wet spinning process.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Properties of PAN precursor fiber are critical for yielding high-quality PANbased carbon fiber. 1 In preparing PAN solutions for manufacturing PAN precursor fibers, the first issue is the solution spinnability. In general, spinnability refers to the ability or the ease of making fibers from a given set of raw materials.…”

Section: Introductionmentioning

confidence: 99%

Investigating the spinnability in the dry‐jet wet spinning of PAN precursor fiber

Tan

Chen

Pan

et al. 2008

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…The demand for carbon fibres used as reinforcement in advanced composite materials is growing rapidly every year 1–3. These fibres are produced from various fibrous precursors but mainly from polyacrylonitrile (PAN) fibres.…”

Section: Introductionmentioning

confidence: 99%

Correlation of chemical shrinkage of polyacrylonitrile fibres with kinetics of cyclization

Simitzis

Soulis

2007

Polymer International

View full text Add to dashboard Cite

It has been established that the most important step in the production of carbon fibres from polyacrylonitrile (PAN) precursor fibres is the oxidative thermal treatment applied. During this treatment, physical phenomena and chemical reactions take place accompanied by the shrinkage of the fibres, which has a physical or chemical origin, depending on the nitrile cyclization reactions. The aim of the present study is to establish a correlation between the chemical shrinkage of PAN fibres and the kinetics of cyclization reactions. Based on the isothermal treatment of PAN fibres, we developed a method in order to distinguish between physical and chemical shrinkages. The onset time for the chemical shrinkage follows a relationship with temperature. Chemical shrinkage versus cyclization time data were fitted with the exponential rise to the maximum of the curves. Furthermore, the cyclization kinetics was studied using differential scanning calorimetry and the kinetic parameters determined were identical to those calculated from the chemical shrinkage, demonstrating that the latter is directly related to the kinetics of the cyclization reactions. It was therefore concluded that according to the method developed to distinguish the physical from the chemical shrinkages: (1) there exists a certain onset time for a given treatment temperature to trigger the chemical shrinkage; (2) cyclization reactions do not start below a limiting temperature of 168 • C; (3) at 340 • C, the temperature where the cyclization reactions are completed, the maximum shrinkage is 24%; and (4) the oxidized PAN fibres contain mainly ladder polymer structures with approximately symmetrical sequences connected in angled positions.

show abstract

“…[1][2][3][4] Polyacrylonitrile (PAN) fibers are the most widely used precursors for producing carbon fibers, owing to a variety of reasons. [5][6][7][8][9] Generally, optimum PAN precursors have many features, such as homogeneous structure, fine denier, high crystallinity, high orientation, and so on. Such fibers are either wet spun or dry-jet wet spun using dimethyl sulfoxide (DMSO)-water solution as a coagulation bath.…”

Section: Introductionmentioning

confidence: 99%

Investigation the jet stretch in PAN fiber dry‐jet wet spinning for PAN‐DMSO‐H₂O system

Zeng

Chen

Zhao

et al. 2009

J of Applied Polymer Sci

View full text Add to dashboard Cite

ABSTRACT:The jet stretch of dry-jet wet spun PAN fiber and its effects on the cross-section shape of fibers were investigated for a PAN-DMSO-H 2 O system. Clearly, the spinning parameters, such as dope temperature, bath concentration, bath temperature, and air gap, all influenced the jet stretch. Also, under uniform conditions, the postdrawing ratio as well as that of jet stretch changed. Under given conditions, as the bath temperature was below 30 C or above 45 C, jet stretch had little effect on the cross-sectional shapes of PAN fiber. Within the temperature of 30-45 C, fiber's cross-section shapes change obviously from round over an approximate circular shape into to an elliptical or a flat shape. The scope of jet stretch produced PAN fiber with circular cross-section was bigger than that in wet spinning. These results indicated that appropriate air gap height, under milder formation conditions in dry-jet wet spinning, could result in higher jet stretch and higher postdrawing ratio. The appropriate jet stretch and postdrawing ratio could result in circular profile of PAN fiber, which were helpful to produce round PAN precursor with finer size and better properties for carbon fiber.

show abstract

Untitled

Cited by 22 publications

References 1 publication

Investigating the spinnability in the dry‐jet wet spinning of PAN precursor fiber

Investigating the spinnability in the dry‐jet wet spinning of PAN precursor fiber

Correlation of chemical shrinkage of polyacrylonitrile fibres with kinetics of cyclization

Investigation the jet stretch in PAN fiber dry‐jet wet spinning for PAN‐DMSO‐H₂O system

Contact Info

Product

Resources

About

Untitled

Cited by 22 publications

References 1 publication

Investigating the spinnability in the dry‐jet wet spinning of PAN precursor fiber

Investigating the spinnability in the dry‐jet wet spinning of PAN precursor fiber

Correlation of chemical shrinkage of polyacrylonitrile fibres with kinetics of cyclization

Investigation the jet stretch in PAN fiber dry‐jet wet spinning for PAN‐DMSO‐H2O system

Contact Info

Product

Resources

About

Investigation the jet stretch in PAN fiber dry‐jet wet spinning for PAN‐DMSO‐H₂O system