Title: EFFECT OF SOLVENT ON THE MORPHOLOGY OF HIGH MOLECULAR WEIGHT POLY(N-VINYL CARBAZOLE) WEB PREPARED BY ELECTROSPINNING
Page Range: p.461-468
Author(s): Hee Sam Kim; Ki Bum Kee; Young Jae Lee; Sung Soo Han; Yong Sik Chung; Han Yong Jeon; Yong Rok Lee; Yeong Soon Gal; Seok Kyun Noh; Won Seok Lyoo
File size: 472K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 18
Issue No: No.8
Abstract
The effects of solvents such as 1,1,2,2-tetrachloroethane (TCE) and tetrahydrofuran (THF) and other processing parameters of electrospinning on the spinnability of high molecular weight poly(N-vinyl carbazole) (PVCz) solution and morphological variations of the as-spun PVCz web were investigated. That is, electrospun PVCz webs with various dimensions and shapes were obtained by controlling the type and amount of solvent and processing parameters like applied voltage, tip to the collector distance, and solution concentration. In the cases of all parameters, the average diameter of fibres in PVCz web electrospun in TCE was finer than that in THF. In addition, minimum diameters of fibres were about 900 nm and 3 micrometre for TCE and THF, respectively. In THF, PVCz fibres at high initial polymer concentration were not cylindrical but planar, which were similar with “ribbon” and nano-sized pores, resulting from the differences in evaporation rates and in the viscosities of the solvent and the solutions. 24 Refs.
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