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Effect of Supercritical Carbon Dioxide on the Thermodynamics of Model Blends of Styrene-Acrylonitrile Copolymer and Poly(methyl methacrylate) Studied by Small-Angle Neutron Scattering

Inceoglu, Sebnem ; Young, Nicholas P. ; Jackson, Andrew LU ; Kline, Steven R. ; Costeux, Stephane and Balsara, Nitash P. (2013) In Macromolecules 46(15). p.6345-6356
Abstract
Quantitative analysis of small angle neutron scattering (SANS) data from homogeneous multicomponent mixtures of supercritical carbon dioxide (scCO(2)) and two polymers is presented for the first time. The two polymers used in this study were styrene-acrylonitrile copolymer (SAN) and deuterated poly(methyl methacrylate) (dPMMA). Model polymers were used to facilitate comparisons between theory and experiment. The random phase approximation (RPA) was used to derive a simple expression to describe SANS profiles. The scCO(2)-free binary blend was studied to determine the temperature dependence of the polymer-polymer interaction parameter. scCO(2)-polymer solubility data was used to relate polymer-solvent interaction parameters. Comparisons... (More)
Quantitative analysis of small angle neutron scattering (SANS) data from homogeneous multicomponent mixtures of supercritical carbon dioxide (scCO(2)) and two polymers is presented for the first time. The two polymers used in this study were styrene-acrylonitrile copolymer (SAN) and deuterated poly(methyl methacrylate) (dPMMA). Model polymers were used to facilitate comparisons between theory and experiment. The random phase approximation (RPA) was used to derive a simple expression to describe SANS profiles. The scCO(2)-free binary blend was studied to determine the temperature dependence of the polymer-polymer interaction parameter. scCO(2)-polymer solubility data was used to relate polymer-solvent interaction parameters. Comparisons between SANS profiles from multicomponent mixtures and the RPA expression provided an estimate of the interaction parameter between scCO(2) and PMMA, chi(13). The addition of scCO(2) at a modest pressure results in a decrease of phase separation temperature T-s by 127 K. The analysis indicates that the change in T-s is caused by an increase in chi(13) with increasing scCO(2) pressure. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Macromolecules
volume
46
issue
15
pages
6345 - 6356
publisher
The American Chemical Society (ACS)
external identifiers
  • wos:000323193300059
  • scopus:84881563967
ISSN
0024-9297
DOI
10.1021/ma401090q
language
English
LU publication?
yes
id
c0ee50cf-9461-484b-bc8d-e16794f7fec6 (old id 4025872)
date added to LUP
2016-04-01 10:41:59
date last changed
2019-04-23 01:25:58
@article{c0ee50cf-9461-484b-bc8d-e16794f7fec6,
  abstract     = {Quantitative analysis of small angle neutron scattering (SANS) data from homogeneous multicomponent mixtures of supercritical carbon dioxide (scCO(2)) and two polymers is presented for the first time. The two polymers used in this study were styrene-acrylonitrile copolymer (SAN) and deuterated poly(methyl methacrylate) (dPMMA). Model polymers were used to facilitate comparisons between theory and experiment. The random phase approximation (RPA) was used to derive a simple expression to describe SANS profiles. The scCO(2)-free binary blend was studied to determine the temperature dependence of the polymer-polymer interaction parameter. scCO(2)-polymer solubility data was used to relate polymer-solvent interaction parameters. Comparisons between SANS profiles from multicomponent mixtures and the RPA expression provided an estimate of the interaction parameter between scCO(2) and PMMA, chi(13). The addition of scCO(2) at a modest pressure results in a decrease of phase separation temperature T-s by 127 K. The analysis indicates that the change in T-s is caused by an increase in chi(13) with increasing scCO(2) pressure.},
  author       = {Inceoglu, Sebnem and Young, Nicholas P. and Jackson, Andrew and Kline, Steven R. and Costeux, Stephane and Balsara, Nitash P.},
  issn         = {0024-9297},
  language     = {eng},
  number       = {15},
  pages        = {6345--6356},
  publisher    = {The American Chemical Society (ACS)},
  series       = {Macromolecules},
  title        = {Effect of Supercritical Carbon Dioxide on the Thermodynamics of Model Blends of Styrene-Acrylonitrile Copolymer and Poly(methyl methacrylate) Studied by Small-Angle Neutron Scattering},
  url          = {http://dx.doi.org/10.1021/ma401090q},
  doi          = {10.1021/ma401090q},
  volume       = {46},
  year         = {2013},
}