Effect of Die-Swell Ratio on Polyacrylonitrile As-Spun Fiber Formation

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In this paper, the effect of die-swell ratio on the microstructure and properties of as-spun fibers was systematically analyzed by electron microprobe analysis (EMPA) and the measurement of die-swell ratio, boiling-water shrinkage, porosity and mechanical properties. The formation mechanism of the spin orientation and skin-core structure were revealed. It was shown that with different die-swell ratio, the spinodal decomposition speed and the orientation degree between the outer and inner of as-spun fibers is different, which leads to a difference of denseness and hardness between the outer and inner, thus the skin-core and porous structures are formed. A small die-swell ratio leads to an enhanced spin orientation, a reduced skin-core difference and a more compact and homogeneous microstructure. As a result, the breaking tenacity of as-spun fibers and resultant precursors all increased.

Info:

Periodical:

Advanced Materials Research (Volumes 295-297)

Edited by:

Pengcheng Wang, Liqun Ai, Yungang Li, Xiaoming Sang and Jinglong Bu

Pages:

1532-1535

DOI:

10.4028/www.scientific.net/AMR.295-297.1532

Citation:

B. H. Ji "Effect of Die-Swell Ratio on Polyacrylonitrile As-Spun Fiber Formation", Advanced Materials Research, Vols. 295-297, pp. 1532-1535, 2011

Online since:

July 2011

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$35.00

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