The name is absent

М^ЕХЛв[{Ра}] = У *Φ[n_θ(r)]∙

Φ[n_ct(r)] is given by

ɪ г 1 ι∕ι ∖ ∣ ^^,1^2           ^^,2          Tlυl∙Tl_v2 7⅛(τ⅛2∙^⅛2) z. _c∖

ФЫ = -_no ɪn(l - n₃) ₊ — _{+ 24πtl} _ _Пз)2 -      - _8я(1_„_з)г. (4.6)

and n_a are the weighted densities. The long range attraction is included using the
mean field approximation.

-∣ Ilb Ilb n

A^ex^^t[{p_a}] = ^Y_ι         ⅛*₂<≈(∣r₂-r_l∣)p∞<(r₁)p∞>(r₂).  (4.7)

a=l ₇=1 ∙'∣Γ2-Γ1∣>σ_α._y

A^ex,assoc _can ɪɔθ _writtθ_n following TPTl using the extension (to fluid mixtures
with molecules having multiple bonding sites) and general notation of Chapman [58,
62] as,

M^fx'^ωηW] = ∕⅛ιf>s<*(rι) £ ɑnjɑ(n) -
^j α=l         A∈Γ<^q) '

The first summation is over all the segments α, and the second over all the association
sites on segment a where f(ɑɔ is the set of all the associating sites on segment а. Хд
denotes the fraction of segments of type a which are not bonded at their site A. This

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