Effects of the tacticities of poly(vinyl alcohol) on the structure and morphology of poly(vinyl alcohol) nanowebs prepared by electrospinning

Hyun Ju Lim, Sung Jun Lee, Han Jo Bae, Seok Kyun Noh, Yone Rok Lee, Sung Soo Han, Han Yong Jeon, Won Ho Park, Won Seok Lyoo

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The effects of tacticities on the characteristics of polyvinyl alcohol) (PVA) nanowebs prepared by an electrospinning technique were investigated. PVA webs composed of uniform nanofibers with syndiotactic dyad (s-dyad) contents of 53.5 and 57.3% were successfully obtained with electrospinning. By changing processing parameters such as the initial polymer concentration, applied voltage, and tip-to-collector distance, we found suitable conditions for forming PVA webs with uniform nanofibers. PVAs of higher s-dyad contents were prepared at a lower solution concentration and at a higher applied voltage because of the easy formation of syndiotactic PVA chain entanglements at a very low polymer concentration. The average diameter of the nanofibers in a PVA web with the higher s-dyad content of 57.3% (ca. 240 nm) was thinner than that of the nanofibers in a PVA web with the lower s-dyad content of 53.5% (ca. 270 nm). In addition, the crystallinity and thermal stability were greatly increased with an increase in the s-dyad content.

Original languageEnglish
Pages (from-to)3282-3289
Number of pages8
JournalJournal of Applied Polymer Science
Volume106
Issue number5
DOIs
StatePublished - 5 Dec 2007

Keywords

  • Electrospinning
  • Morphology
  • Poly(vinyl alcohol)

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