The name is absent

(a)

Figure 7.1: (a) Model of a branched chain molecule. The backbone has ‘m’ segments and
the two branches at backbone segment ‘j’ and ‘k’ are ‘b/ and ^ζb∕_c^,, respectively, b_j has m_j
segments while bʌ, has n⅛ segments. The total number of segments in the chain, N = m
+ m_j∙ + rn⅛. (b) Schematic of the formation of a branched polymer chain of N segments
from N associating spheres. For a middle segment a , site ‘A’ associates with site ‘B’ on
the segment a' = a + 1 and site ‘B’ associates with site ‘A’ on the segment a' = a - 1.
The branch points on the backbone T and ‘k’ have additional associating site ‘C’ which
associates with the branch segments, ¹b_j m₃^, and ^ζb⅛ m⅛^,, respectively. End segments 1, m,
^tb₇ 1’ and ‘bfc 1’ have only one associating site, ‘A’ or ‘B’.