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논문 기본 정보

자료유형
학술저널
저자정보
Cho, Yong-Han (Division of Applied Chemical Engineering, Hanyang University) Dan, Kyung-Sik (Division of Applied Chemical Engineering, Hanyang University) Kim, Byoung-Chul (Division of Applied Chemical Engineering, Hanyang University)
저널정보
한국유변학회 Korea-Australia rheology journal Korea-Australia rheology journal 제20권 제2호
발행연도
2008.1
수록면
73 - 77 (5page)

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초록· 키워드

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The rheological properties of polar solutions are very sensitive to preparative methods as well as measuring conditions. The effects of dissolution temperature on the rheological properties of the solutions of polyvinyl alcohol (PVA) in dimethyl sulfoxide were investigated over the range of dissolution temperatures $70-130^{\circ}C$. Viscosity was increased as dissolution temperature was increased. PVA solutions prepared at 120 and $130^{\circ}C$ showed Bingham behavior, which became less noticeable with decreasing dissolution temperature. The modified Cole-Cole plot of the solutions gave slope less than 2, suggesting the solutions were a heterogeneous system irrespective of optical transparency. Further, the slope was decreased with increasing dissolution temperature, indicating that the solid character got more prominent as dissolution temperature was increased. However, the relaxation time of the solutions was little dependent on dissolution temperature.

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