ベローズ法による高温高圧下におけるポリマーのPVT測定装置の開発
Development of an Apparatus for Measuring PVT Properties of Polymers Using a Bellows Method under High Temperature and Pressure
佐藤善之・滝嶌繁樹・舛岡弘勝・木原勇二・山本伸治
Sato, Yoshiyuki / Takisima, Shigeki / Masuoka, Hirokatsu / Kihara, Yuji / Yamamoto, Shinji
An apparatus for measuring the PVT properties of polymers using a metal bellow was developed for pressures up to 200MPa and temperatures from 313K to 473K. The relationship between the volume of the sample cell and the displacement of the bellows was determined measuring the PVT properties of water for temperatures up to 473K and pressures up to 200MPa with an accuracy of ±0.1%. The PVT data for mercury measured with the apparatus showed good agreement with literature values. The PVT relationship for polystyrene was measured in the same ranges of temperature and pressure. The estimated uncertainty in data was less than ±0.0053cm3/g. The PVT data in the rubbery state were correlated with three equations of state. The Simha-Somcynsky equation of state showed the best agreement with experimental values.
Key words: PVT Relationship / Polystyrene / Equation of State / High Temperature / High Pressure