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전기방사용 PVDF/DMAc 용액계의 유변학적 특성
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  • 전기방사용 PVDF/DMAc 용액계의 유변학적 특성
  • The Rheological Properties of the Solutions of PVDF in DMAc for Electrospinning
저자명
지병화,김병철,Ji. Byoung Hwa,Kim. Byoung Chul
간행물명
韓國纖維工學會誌
권/호정보
2004년|41권 6호|pp.419-423 (5 pages)
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한국섬유공학회
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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The solutions of polyvinylidene fluoride (PVDF) in dimethyl acetamide (DMAc) were rheologically investigated. In the dilute concentration regime, the solutions gave values of Huggins constant lower than 0.52, which decreased with increasing temperature. This suggests that DMAc is a good solvent and the solvating power is increased with increasing temperature. The solutions exhibited an inflection point on the log-log plot of $eta_{sp}$ versus $(eta)C$. Further, the slope was slightly decreased with increasing temperature from 10 to $30^{circ}C$. At high concentrations, the solutions did not show lower Newtonian flow region. Further, raising temperature from 10 to $30^{circ}C$ increased viscosity and yield stress of the solutions. Increasing concentration had the same effect on the rheological properties as increasing temperature. Relaxation time $(lambda) $ increased as the concentration and temperature increased.