INTEMA   05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
artículos
Título:
CO2 + 2-propanol) mixture as a foaming agent for polystyrene: A simple thermodynamic model for the high pressure VLE-phase diagrams taking into account the foam vitrification
Autor/es:
MARCO DONDERO; JOSÉ CARELLA; JULIO BORRAJO
Revista:
JOURNAL OF APPLIED POLYMER SCIENCE
Referencias:
Año: 2006
ISSN:
0021-8995
Resumen:
The equation of state model developed by
Lacombe and Sanchez (J Phys Chem 1976, 80, 2352) is
used in the form proposed later by Sanchez and Stone
(Polymer Blends, Vol. 1: Formulation, 2000; Chapter 2) to
correlate experimental vapor-liquid equilibrium (VLE) data
for the three binaries and the ternary systems. Experimental
data from the binary systems carbon dioxide-isopropyl
alcohol (CO2-IPrOH), isopropyl alcohol-polystyrene
(IPrOH-PS), and carbon dioxide-polystyrene (CO2-PS) are
used to calculate VLE properties for the ternary system
CO2-IPrOH-PS. Two-dimensional VLE-phase diagrams
were calculated and used to describe from a thermodynamic
point of view the pressure, volume, and temperature
values that characterize a thermoplastic foam
evolution process, from the extruder to the foaming die.
For different initial mixture CO2 þ IPrOH concentrations,
pressure reduction produces liquid foaming until the vitrification
curve arrests the final foam volume expansion.
The dependence of the vitreous transition with the system
CO2 þ IPrOH concentration while foaming is represented
by the Chow (Macromolecules 1980, 13, 362) equation. The
calculation procedure is proposed as a design tool to
reduce the amount of experimental data usually needed as
a requirement previous to the design stage.2-IPrOH), isopropyl alcohol-polystyrene
(IPrOH-PS), and carbon dioxide-polystyrene (CO2-PS) are
used to calculate VLE properties for the ternary system
CO2-IPrOH-PS. Two-dimensional VLE-phase diagrams
were calculated and used to describe from a thermodynamic
point of view the pressure, volume, and temperature
values that characterize a thermoplastic foam
evolution process, from the extruder to the foaming die.
For different initial mixture CO2 þ IPrOH concentrations,
pressure reduction produces liquid foaming until the vitrification
curve arrests the final foam volume expansion.
The dependence of the vitreous transition with the system
CO2 þ IPrOH concentration while foaming is represented
by the Chow (Macromolecules 1980, 13, 362) equation. The
calculation procedure is proposed as a design tool to
reduce the amount of experimental data usually needed as
a requirement previous to the design stage.2-PS) are
used to calculate VLE properties for the ternary system
CO2-IPrOH-PS. Two-dimensional VLE-phase diagrams
were calculated and used to describe from a thermodynamic
point of view the pressure, volume, and temperature
values that characterize a thermoplastic foam
evolution process, from the extruder to the foaming die.
For different initial mixture CO2 þ IPrOH concentrations,
pressure reduction produces liquid foaming until the vitrification
curve arrests the final foam volume expansion.
The dependence of the vitreous transition with the system
CO2 þ IPrOH concentration while foaming is represented
by the Chow (Macromolecules 1980, 13, 362) equation. The
calculation procedure is proposed as a design tool to
reduce the amount of experimental data usually needed as
a requirement previous to the design stage.2-IPrOH-PS. Two-dimensional VLE-phase diagrams
were calculated and used to describe from a thermodynamic
point of view the pressure, volume, and temperature
values that characterize a thermoplastic foam
evolution process, from the extruder to the foaming die.
For different initial mixture CO2 þ IPrOH concentrations,
pressure reduction produces liquid foaming until the vitrification
curve arrests the final foam volume expansion.
The dependence of the vitreous transition with the system
CO2 þ IPrOH concentration while foaming is represented
by the Chow (Macromolecules 1980, 13, 362) equation. The
calculation procedure is proposed as a design tool to
reduce the amount of experimental data usually needed as
a requirement previous to the design stage.2 þ IPrOH concentrations,
pressure reduction produces liquid foaming until the vitrification
curve arrests the final foam volume expansion.
The dependence of the vitreous transition with the system
CO2 þ IPrOH concentration while foaming is represented
by the Chow (Macromolecules 1980, 13, 362) equation. The
calculation procedure is proposed as a design tool to
reduce the amount of experimental data usually needed as
a requirement previous to the design stage.2 þ IPrOH concentration while foaming is represented
by the Chow (Macromolecules 1980, 13, 362) equation. The
calculation procedure is proposed as a design tool to
reduce the amount of experimental data usually needed as
a requirement previous to the design stage.