Abstract
A new molecular thermodynamic model is developed of the glass transition temperatures (Tg) of binary polymer-salt complexes by combining configurational entropy theory with Guggenheim's form of the Debye-Hückel theory. The interactions between the polymer chains and the salt as well as those between cations and anions are accounted for by this model. The predictions of this extended configurational entropy theory are compared with the Tg values of poly(2-ethyl-2-oxazoline) (POZ) complexed with AgBF4, AgClO4, AgCF3SO3, and AgNO3 at various compositions, as obtained by differential scanning calorimetry (DSC). The model accurately predicts the experimental Tg values even at high concentrations of silver salt (i.e., up to a mole ratio of [Ag]/[C=O] = 1/1), where the deviation of the simple configurational entropy theory from experimental data is large. Moreover, the maximum in the glass transition temperature, i.e., the increase in Tg with salt concentration at low salt concentrations but its decrease at high salt concentrations, is explicable with this model.
| Original language | English |
|---|---|
| Pages (from-to) | 5901-5905 |
| Number of pages | 5 |
| Journal | Journal of Physical Chemistry B |
| Volume | 107 |
| Issue number | 24 |
| Publication status | Published - 2003 Jun 19 |
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All Science Journal Classification (ASJC) codes
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry
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Analysis of the glass transition behavior of polymer-salt complexes : An extended configurational entropy model. / Kim, Jong Hak; Min, Byoung Ryul; Won, Jongok; Kang, Yong Soo.
In: Journal of Physical Chemistry B, Vol. 107, No. 24, 19.06.2003, p. 5901-5905.Research output: Contribution to journal › Article
TY - JOUR
T1 - Analysis of the glass transition behavior of polymer-salt complexes
T2 - An extended configurational entropy model
AU - Kim, Jong Hak
AU - Min, Byoung Ryul
AU - Won, Jongok
AU - Kang, Yong Soo
PY - 2003/6/19
Y1 - 2003/6/19
N2 - A new molecular thermodynamic model is developed of the glass transition temperatures (Tg) of binary polymer-salt complexes by combining configurational entropy theory with Guggenheim's form of the Debye-Hückel theory. The interactions between the polymer chains and the salt as well as those between cations and anions are accounted for by this model. The predictions of this extended configurational entropy theory are compared with the Tg values of poly(2-ethyl-2-oxazoline) (POZ) complexed with AgBF4, AgClO4, AgCF3SO3, and AgNO3 at various compositions, as obtained by differential scanning calorimetry (DSC). The model accurately predicts the experimental Tg values even at high concentrations of silver salt (i.e., up to a mole ratio of [Ag]/[C=O] = 1/1), where the deviation of the simple configurational entropy theory from experimental data is large. Moreover, the maximum in the glass transition temperature, i.e., the increase in Tg with salt concentration at low salt concentrations but its decrease at high salt concentrations, is explicable with this model.
AB - A new molecular thermodynamic model is developed of the glass transition temperatures (Tg) of binary polymer-salt complexes by combining configurational entropy theory with Guggenheim's form of the Debye-Hückel theory. The interactions between the polymer chains and the salt as well as those between cations and anions are accounted for by this model. The predictions of this extended configurational entropy theory are compared with the Tg values of poly(2-ethyl-2-oxazoline) (POZ) complexed with AgBF4, AgClO4, AgCF3SO3, and AgNO3 at various compositions, as obtained by differential scanning calorimetry (DSC). The model accurately predicts the experimental Tg values even at high concentrations of silver salt (i.e., up to a mole ratio of [Ag]/[C=O] = 1/1), where the deviation of the simple configurational entropy theory from experimental data is large. Moreover, the maximum in the glass transition temperature, i.e., the increase in Tg with salt concentration at low salt concentrations but its decrease at high salt concentrations, is explicable with this model.
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UR - http://www.scopus.com/inward/citedby.url?scp=0038237127&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0038237127
VL - 107
SP - 5901
EP - 5905
JO - Journal of Physical Chemistry B
JF - Journal of Physical Chemistry B
SN - 1520-6106
IS - 24
ER -