Order−Disorder Transition, Microdomain Structure, and Phase Behavior in Binary Mixtures of Low Molecular Weight Polystyrene-block-polyisoprene Copolymers

Order−disorder transition, microdomain structure, and phase behavior in binary mixtures of low molecular weight polystyrene-block-polyisoprene (SI diblock) copolymers were investigated. For the study, four SI diblock copolymers were synthesized, namely (i) SI-Q having a weight-average molecular weight (M w) of 2.8 × 104 and polystyrene volume fraction (f) of 0.186, (ii) SI-R having M w = 1.5 × 104 and f = 0.508, (iii) SI-S having M w = 1.76 × …