stoichiometry.
The approximation that ‘Each site reaches its vanishing limit at the same rate, i.e.
Xв (r2) ≈ Хд(Г1)’ does not correctly constrain stoichiometry. It is true that in the
limit of complete association that both Хд and Xg tends to zero, but probably not
at the same rate. Thus the central task is to get an accurate expression for Хд. Mod-
ified iSAFT density functional theory developed in this research work addresses this
problem and is directly applicable to a range of polymer systems with heteronuclear
chains.
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