The spinning method as a factor in the morphology of polyacrylonitrile fibre

Volkov, Yury; Gorbacheva, V. O.; Fedorkina, S. G.; Semyakina, I. S.; Konkin, A. A.

doi:10.1007/bf00547702

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“…The oriented fibrillar structure is one of the most remarkable characteristics of high‐performance polymer fibers. As a high‐performance polymer fiber, polyacrylonitrile (PAN) fibers also have a fibrillar structure . The fibrillar structure along with fiber axis has a great effect on the performance of the PAN fiber.…”

Section: Introductionmentioning

confidence: 99%

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Fibrillar structure development of polyacrylonitrile fibers treated by ultrasonic etching in oxidative stabilization

Wang

Tang

et al. 2017

Polymers for Advanced Techs

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Polyacrylonitrile fibers were oxidatively stabilized through 10 gradient‐elevated temperature zones in sequence. The ultrasonic etching method was used for fibril separation of fibers heated at different temperatures, and the fibrillar structure development was studied by scanning electron microscopy. The voids among fibrils are the weak combination points. Under ultrasonic etching, the voids are enlarged. Subsequently, the solvent enters and spreads among fibrils, which results in the separation of fibrils. Separated fibrils with diameters of 100–400 nm appear in fibers heated at less than 235°C. Fibrils in fibers heated from 195°C to 235°C tend to adhere to each other, and the observed macrofibrils are composed of several to dozens of fibrils. For fibers heated from 195°C to 245°C, only a few fibril bundles emerge on the skin near the fiber end, and the fibrils manifest themselves as numerous protuberances on the cross section. In the ranges of 255–275°C, fibrils compactly combine with each other, which suggests insolubility and infusibility, and no separated fibrils appear. The fibrils arrange in a systematic way along the fiber axis and grooves parallel to the fiber axis on the fibers' surface. These grooves are the macro behavior of fibrils arranging on the fiber surface. Copyright © 2017 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

“…The fibril itself is quite complex. Some experts indicated that fibrils were composed of microfibrils. The microfibrils are composed of elementary fibrils (also known as protofibril or basic fibril).…”

Section: Introductionmentioning

confidence: 99%

Fibrillar structure development of polyacrylonitrile fibers treated by ultrasonic etching in oxidative stabilization

Wang

Tang

et al. 2017

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

The spinning method as a factor in the morphology of polyacrylonitrile fibre

Cited by 1 publication

References 0 publications

Fibrillar structure development of polyacrylonitrile fibers treated by ultrasonic etching in oxidative stabilization

Fibrillar structure development of polyacrylonitrile fibers treated by ultrasonic etching in oxidative stabilization

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