Precise measurement of the PVT of polypropylene and polycarbonate up to 330°C and 200 MPa

Yoshiyuki Sato, Yoshiteru Yamasaki, Shigeki Takishima, Hirokatsu Masuoka

Research output: Contribution to journalArticlepeer-review


An apparatus for measuring the pressure-volume-temperature (PVT) properties of polymers using a metal bellows has been developed at temperatures from 313 to 623 K and pressures up to 200 MPa. A calibration of the device was performed by measuring PVT of mercury and water. The experimental uncertainty of specific volumes was estimated to be within ±0.2%, while that of temperatures was within ±0.1 K below 300°C and ±0.3 K above 300°C. The estimated uncertainty of pressures was ±0.1 MPa below 100 MPa and ±0.25 MPa above 100 MPa. The PVT properties of polypropylene and polycarbonate were measured by the apparatus in the temperature ranges from 40 to 300°C and from 40 to 330°C, respectively, and pressures from 10 to 200 MPa. The effects of a sample cup and sample forms were investigated. The use of the sample cup showed a little effect on the measurments of PVT properties for both samples. The shape (pellet and pillar) of the samples caused a small difference in the specific volumes only under high temperatures and low pressures. The PVT properties in a melt state were correlated by the Simha-Somcynsky equation of state, showing a good agreement with measurements.

Original languageEnglish
Pages (from-to)141-150
Number of pages10
JournalJournal of Applied Polymer Science
Issue number1
Publication statusPublished - 1997 Oct 3
Externally publishedYes


  • Polycarbonate
  • Polypropylene
  • PVT
  • Simha-Somcynsky EOS

ASJC Scopus subject areas

  • Chemistry(all)
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Materials Chemistry


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