fraction of unbonded sites ‘A’ on the backbone segments as
, ` = exp(∕3 *⅛‰(rα), (7.19)
xA^a)
where, I2 is the complimentary recursive function, I2,m(y) = 1 and
∕2,√r) = ʃdr'∕2,j+ι(r3exp[T)j+1(r')]Brj∙+ι(r')Δθ,j+1^(r,r'). This is physically de-
picted in fig. 7.2b. Finally, substituting the expressions for X⅞ from eqn. 7.19 and
X⅛ from eqn. 7.18 (and Xg from eqn. 7.16 for backbone segments with branches) in
the Euler-Lagrange equation for the backbone segment a gives the density profile of
the segment.
pα(r) = exp(∕⅛) exp[Pa(r)]BrQ(r)/i_Q(r)72,a(r), (7.20)
where ∕⅛(= ∑2*7=ι∕1≈) ɪ8 the bulk chemical potential of the chain molecule.
Next, the density profiles of the segments in the branch lb3, are derived. Substi-
tuting for Хд from eqn. 7.19 and Xjb from eqn. 7.18 in the Euler-Lagrange equation
for the backbone segment ij, gives
J-I m
Pj(r)xc(r) = exp(∕3∑*⅛)exp( Σ *⅛≈)cxp(⅛j)exP[^(r)]Λj(r)72j(r)∙ (7.21)
i=l i=J+l
Using this equation and applying proc. A from segment ‘j’ onwards to the branch
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