Phase Structure of Acrylic Fibers Processed with Ionic Liquid as Solvent

Abstract:

The acrylic fibers were prepared by dry-jet wet spinning technology from polyacrylinitrile (PAN) /1-butyl-3-methylimidazolium chloride ([BMIM]Cl) solution for the investigation of phase structure changing with drawing in boiling water. The DMA, WAXD and stress-strain measurements were conducted. It is shown that only a single Tg was observed from DMA and the paracrystalline structure was shown from WAXD. Although the the crystallinity and orientation increased with increasing draw ratio, the high crystallinity of the pre-drawn fiber indicates that the ordered structure was formed in the pre-drawn fiber by the high pre-drawn ratio (3.5) during the dry-jet wet spinning from high-viscosity PAN/[BMIM]Cl solution. It is also found that the initial modulus, ultimate elongation and tenacity increased with the increase of draw ratio.

• Periodical: Advanced Materials Research (Volumes 560-561)
• Pages: 41-45
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.560-561.41
• Online since: August 2012
• Authors: Xue Min Yin, Li Zhang, Xin Jun Zhu, Hua Ping Wang, Yu Mei Zhang
• Keywords: Acrylic Fiber, Mechanical Property, Phase Structure

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