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Effects of the tacticities of poly(vinyl alcohol) on the structure and morphology of poly(vinyl alcohol) nanowebs prepared by electrospinning
- Effects of the tacticities of poly(vinyl alcohol) on the structure and morphology of poly(vinyl alcohol) nanowebs prepared by electrospinning
- Lim, HJ[Lim, Hyun Ju]; Lee, SJ[Lee, Sung Jun]; Bae, HJ[Bae, Han Jo]; Noh, SK[Noh, Seok Kyun]; Lee, YR[Lee, Yong Rok]; Han, SS[Han, Sung Soo]; Jeon, HY[Jeon, Han Yong]; Park, WH[Park, Won Ho]; Lyoo, WS[Lyoo, Won Seok]
- DGIST Authors
- Lee, SJ[Lee, Sung Jun]
- Issue Date
- Journal of Applied Polymer Science, 106(5), 3282-3289
- Article Type
- Concentration (Process); Crystallinity; Electrospinning; Fiber Diameter; Initial Polymer Concentration; Morphology; Nanofiber; Nanofibers; Nanowebs; Poly(Vinyl Alcohol); Polymer Solution; Polyvinyl Alcohol; Polyvinyl Alcohols; Syndiotactic Polymer; Thermal Stability; Uniform Nanofibers
- 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. © 2007 Wiley Periodicals, Inc.
- John Wiley and Sons
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