The name is absent

association is then given by

⅛ Σ f /     P7(n)p7(r2W(r₁)Xj'(r₂)^⅛^⅛*₂, (4.17)

²₇₌1_Л€ГМ7 √∣Γι-Γ₂∣=σ77'                              ∂p_a (l)

where in the second term of the eqn., the first sum is over all segments 7 and the
second sum is over all the sites A on segment 7, each of which bond to the site B on
its neighboring segment 7'. In eqn. 4.17, the value of t∕⁷⁷(rι, r₂) is only needed at
contact due to the presence of J(∣ι^,ι — r₂∣ — σ^τγ,) in the integral. Since its exact form
in an inhomogeneous system is not known in a tractable form, various approximations
have been proposed as simplification [101]. Here, у ⁷⁷ (rι,r₂) is approximated by

W^,Xα√rι. r₂) = ⅛^UU'⁹(rι))] * ^U{⅛^4,(r₂)}]}^l'∖     (4.18)

where ∕⅛^e9(r1) is the weighted density of segment a at position rɪ. In the current
work a simple weighting is used,

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