PVT properties of polyethylene copolymer melts

Yoshiyuki Sato, Hajime Hashiguchi, Kenzo Inohara, Shigeki Takishima, Hirokatsu Masuoka

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


PVT properties of four polyethylene random copolymers (ethylene-propylene, ethylene-1-butene, ethylene-1-hexene, and ethylene-1-octene) and linear polyethylene were measured at temperatures from 313 to 493 K and pressures up to 200 MPa. Dependence of properties such as specific volume, thermal expansion coefficient, isothermal compressibility, and characteristic parameter of equations of state on the length of the polymer branched chains were examined. It was found that the length of the branched chain did not affect the thermal expansion coefficient and isothermal compressibility. The specific volume of copolymers having longer branched chains were slightly larger than those copolymers with short branched chains.

Original languageEnglish
Pages (from-to)124-130
Number of pages7
JournalFluid Phase Equilibria
Issue number2
Publication statusPublished - 2007 Aug 25
Externally publishedYes


  • Copolymer melt
  • Equations of state
  • PVT properties

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry


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