Mixing state of amphiphilic di-block copolymer/homopolymer blends

The mixing state of amphiphilic di-block copolymers consisted of poly(ethylene oxide) and poly(methacrylate) having azobenzene moieties in the side chains p(EO)(114)pMA(Az)(24) and poly(ethylene oxide) p(EO)(114) was investigated from the viewpoints of isothermal crystallization and nano-scale ordered structure. The chemical potential, which required establishing the constant crystal growth rate, decreased with the p(EO) content up to 60%. The hexagonal packed cylinder structure was observed for the blends with the p(EO) content up to 60% and the lattice spacing of (100) and (110) planes increased with the p(EO) content up to 60%. The blends of amphiphilic p(EO)(114)pMA(Az)(24) and p(EO)(114) were miscible without in the p(EO) content below 60%.