Separation of Low Molecular Mass Fractions of Ultrafine Polytetrafluoroethylene by Supercritical Carbon Dioxide

2009, №2

сс. 4-15

Yu.E. Vopilov, L.N. Nikitin, A.R. Khokhlov, V.M. Buznik

Key words: supercritical carbon dioxide, ultrafine polytetrafluoroethylene, solubility, Chrastil model, Mendez-Santjago model, Bartle model

The solubility and separation of low  molecular mass fractions of ultrafine
polytetrafluoroethylene (UPTFE) in  supercritical carbon dioxide (SC-CO₂) are

measured using static method in the  temperature and pressure ranges of 318÷383 K
and 10÷70 MPa, respectively. The solubility isotherms follow  the behavior typical for
«solid.supercritical fluid» systems, i.e.  the solubility increases with pressure, due to
increasing of SC-CO₂ pressure,  and temperature. The experimental data are discussed
in terms of three different density-based  models proposed by Chrastil, Bartle and
Mendez-Santjago. It was concluded that two  last models well predict the shape of
experimentally  observed dependences.

Translated article

doi:10.1134/S1990793109070069

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ГОСТ
7.0.100-2018

Вопилов, Ю.Е. Separation of Low Molecular Mass Fractions of Ultrafine Polytetrafluoroethylene by Supercritical Carbon Dioxide / Ю.Е. Вопилов, Л.Н. Никитин, А.Р. Хохлов [и др.]. – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2009. – Т. 4. – № 2. – С. 4-15.

TRANSLIT

Вопилов, Ю.Е. Separaciya nizkomolekulyarnyh frakcij ul'tradispersnogo politetraftoretilena sverhkriticheskim dioksidom ugleroda / Ю.Е. Вопилов, Л.Н. Никитин, А.Р. Хохлов [i dr.]. – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2009. – Т. 4. – № 2. – S. 4-15.

Yu.E. Vopilov, L.N. Nikitin, A.R. Khokhlov, V.M. Buznik Separation of Low Molecular Mass Fractions of Ultrafine Polytetrafluoroethylene by Supercritical Carbon Dioxide. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 2, 4-15 (2009). https://doi.org/

Separation of Low Molecular Mass Fractions of Ultrafine Polytetrafluoroethylene by Supercritical Carbon Dioxide

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