potential cut-off distance and
1
5
f ^wa
∖ Z
)9
3 ∕rτ ∖3
° t υwa ∖
2 ∖-Γ )
(5.6)
All the interaction diameters are the same, σwa = σw = σ. Furthermore, the surfaces
are symmetric, that is both the surfaces preferentially attract the segments in the A
block with εwA = εw and repel the segments in the B block with ewβ — 0.
The general formulation of modified iSAFT as a DFT was presented in the previ-
ous chapter. As mentioned, the basis of a DFT is the energy minimum principle or
mathematically,
<5Ω[{pα,4(r)} , {pq,b(γ)}]
= 0 Va = l,m, (5.7)
[{pα,Λ }, {pα,s }] equilibrium
where Ω is the grand free energy of the open system at fixed chemical potential (μ),
volume (V), and temperature (T), ра,д is the density of a segment a of type A, {pa,д}
is the set of densities of all the segments in the A block of the copolymer, and m (=
2N) is the total number of segments in the copolymer chain. Since a segment-based
DFT like modified iSAFT treats every segment individually, let {pα} denote the set
of densities of all the segments of the copolymer that are enumerated from 1 to m, 1
being the first segment of the copolymer and m being the last one. It is to be noted
that 1 to N are the segments in the A block and (N+l) to m are the segments in the
B block of the copolymer. The set of eqs. 5.7 can be reformulated in terms of the
120
More intriguing information
1. Partner Selection Criteria in Strategic Alliances When to Ally with Weak Partners2. Geography, Health, and Demo-Economic Development
3. THE RISE OF RURAL-TO-RURAL LABOR MARKETS IN CHINA
4. Word searches: on the use of verbal and non-verbal resources during classroom talk
5. HACCP AND MEAT AND POULTRY INSPECTION
6. A Duality Approach to Testing the Economic Behaviour of Dairy-Marketing Co-operatives: The Case of Ireland
7. THE DIGITAL DIVIDE: COMPUTER USE, BASIC SKILLS AND EMPLOYMENT
8. Empirically Analyzing the Impacts of U.S. Export Credit Programs on U.S. Agricultural Export Competitiveness
9. Agricultural Policy as a Social Engineering Tool
10. The name is absent