High-pressure phase equilibria in the system linear low density polyethylene + isohexane: Experimental results and modelling

I. Nagy, Ryan A. Krenz, Robert A. Heidemann, Theo W. de Loos

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

High-pressure phase equilibrium data were measured for the system linear low density polyethylene (LLDPE) + isohexane. The LLDPE sample was a hydrogenated polybutadiene (hPBD) and was nearly monodisperse (Mw / Mn = 1.19). Phase transitions were observed visually using a Cailletet apparatus for mixtures with polymer mass fractions from 0 to 0.25 at temperatures from 380 to 500 K and pressures up to 12 MPa. Cloud points, bubble points and three-phase liquid-liquid bubble points were measured. The data were modeled using the modified Sanchez-Lacombe (MSL) equation of state. Results are compared with data and model calculations for the same LLDPE with n-hexane.

Original languageEnglish
Pages (from-to)125-133
Number of pages9
JournalJournal of Supercritical Fluids
Volume40
Issue number1
DOIs
Publication statusPublished - Feb 2007

Fingerprint

Linear low density polyethylenes
Hexanes
linear systems
Phase equilibria
polyethylenes
Bubbles (in fluids)
bubbles
polybutadiene
Polybutadienes
Liquids
Hexane
Equations of state
Polymers
liquid phases
equations of state
Phase transitions
polymers
liquids
Temperature
temperature

Keywords

  • Bubble point
  • Cloud point
  • Isohexane
  • Linear low density polyethylene
  • Liquid-liquid bubble point
  • Modified Sanchez-Lacombe (MSL) equation of state

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Science (miscellaneous)
  • Physics and Astronomy (miscellaneous)
  • Chemical Engineering(all)
  • Condensed Matter Physics

Cite this

High-pressure phase equilibria in the system linear low density polyethylene + isohexane : Experimental results and modelling. / Nagy, I.; Krenz, Ryan A.; Heidemann, Robert A.; de Loos, Theo W.

In: Journal of Supercritical Fluids, Vol. 40, No. 1, 02.2007, p. 125-133.

Research output: Contribution to journalArticle

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