Static and dynamic scattering properties of(a-b) diblock copolymer chains h
aving different architectures are discussed in the framework of the random
phase approximation (RPA)I The case of a symmetric diblock (50/50) in a sol
vent satisfying the zero average contrast condition,in the semidilute regim
e, is considered in detail. We, in particular, calculate the scattering int
ensity and the relaxation times of linear rod-coil and once-broken rod copo
lymer chains and compare the results to those already known for classical l
inear diblock copolymers and to more recent results on ring diblock systems
. Both static and dynamic scattering properties show that the microphase se
paration.(MST) occurs for the symmetrical case at (chi PhiN, q(m)R(gt)) =(1
7.7, 2.9), (8.5, 2.2), and (8.2, 2.5) for ring coil-coil, linear rod-coil,
and once-broken rod diblocks, respectively. These results are compared with
those for linear diblock copolymers where the MST occurs at (10.5, 2).