Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
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Measurement of Toluene Solubility in PVAc Using a Quartz Crystal Microbalance

PVAc에서 Quartz Crystal Microbalance를 이용한 톨루엔의 용해도 측정에 관한 연구

  • Kim, S.B. (Department of Chemical Engineering, Kyonggi University)
  • Published : 2008.09.30
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Abstract

The resistance and frequency change of a quartz crystal microbalance during toluene absorption was measured for poly(vinyl acetate) (PVAc) with 268 nm thickness. Solubility of toluene in PVAc were measured at temperatures from 25$^{\circ}C$ to 42$^{\circ}C$ and pressures up to 28.4 torr. The frequency of a quartz crystal microbalance increased with increasing temperature and decreased with an increase in toluene vapor pressure. The resistance of a quartz crystal microbalance increased with increasing toluene vapor pressure and decreased with an increase in temperature. A greater pressure of toluene results in a greater solubility of the toluene into the PVAc film. The change of solubility was calculated by Sauerbrey equation.

268 nm두께의 PVAc가 코팅된 수정결정 미소저울(QCM)을 사용하여 저항과 진동수 변화를 측정하였다. 이를 이용하여 온도($25^{\circ}C\sim42^{\circ}C$)와 톨루엔의 증기압(12.4$\sim$28.4 torr)변화에 따른 톨루엔의 폴리비닐아세테이트에 대한 용해도를 측정하였다. 진동수는 온도가 증가함에 따라 증가하였으나 톨루엔의 증기압이 증가하면 감소하는 경향을 보였다. 톨루엔의 온도가 증가함에 따라 저항은 감소하였으며, 증기압이 증가하면 저항도 증가하는 경향을 나타내었다. Sauerbrey 식을 이용하여 온도와 압력변화에 따른 용해도 변화를 측정하였다.

Keywords

References

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