At sufficiently high molecular weight and narrow
polydispersity, the phase behavior and the mechanical
properties of styrene/butadiene based triblock copolymers
are generally governed by their chemical
composition The micromechanical properties, which
form a bridge between morphology and mechanical
properties, are dictated by the nature of microphaseseparated
structures. However, it has been known for
some time that a change in the chain architecture at
constant composition can have a dramatic influence
on their microphase separation behavior and consequently
on their deformation mechanisms.