Electrospun nanofiber-reinforced polypropylene composites: Nucleating ability of nanofibers

Chi Wang, Yi Jiun Wu, Chih Yung Fang, Cheng Wein Tsai

研究成果: Article同行評審

14 引文 斯高帕斯(Scopus)

摘要

Electrospun nanofibers of 10 semi-crystalline polymers were obtained. The nucleating abilities of these nanofibers toward isotactic polypropylene (iPP) were investigated. Conventional PTFE and PBO fibers were also examined for comparison. The tested fibers were embedded in the iPP matrix to induce the transcrystalline layer and their nucleating abilities were characterized by optical microscopy. However, due to the limitation of optical resolution the increasing number of iPP nuclei on the tiny electrospun fibers was too difficult to trace for determining the surface nucleating rate. To address this problem, the variation of depolarized light intensity under a constant cooling rate was monitored. The induction temperature (Ti) for fiber-surface nucleation was determined to characterize the nucleating ability of fibers; that is, the higher the Ti, the better the nucleating ability of the fibers. Our results indicated that the nucleating ability of fibers can be classified into four categories: strong for the PBT and PTFE fibers; medium for the PTT, PET, iPS, PVA, PA6 and PBO fibers; weak for the sPS fiber; and inactive for the PA46, and PMP fibers. All active fibers induced the α-form of iPP crystals except the iPS fibers, which induced the β crystals through the α-to-β growth transition mechanism.

原文English
頁(從 - 到)1-8
頁數8
期刊Composites Science and Technology
126
DOIs
出版狀態Published - 2016 四月 1

All Science Journal Classification (ASJC) codes

  • 陶瓷和複合材料
  • 工程 (全部)

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