Mixed Supercrystalline Structures in Mixtures of ABC Triblock and ab(bc) Diblock Copolymers, 3. Lamellar and Cylindrical Structures in Bicomponent Mixtures

Novel Superlattices via Blending of Asymmetric Triblock Terpolymers with Diblock Copolymers

“…A few examples of such systems have been reported elsewhere. [7][8][9][10][11] In blends of ABC with AB (or BC) block copolymers, a mixing at the molecular level of both blocks of the diblock copolymer with the corresponding blocks of the triblock terpolymer leads to centrosymmetric core-shell types of superstructures. Blends of symmetric lamellar polystyreneblock-polybutadiene-block-poly(methyl methacrylate) (S 33 B 34 M 33 153 ) with B 53 M 47 94 and also of symmetric lamellar polystyrene-block-polybutadiene-block-poly(tert-butyl methacrylate) (S 33 B 34 T 33 160 ) with B 50 T 50 107 block copolymers of similar block sizes lead to core-shell morphologies.…”

“…Depending on the blend ratio, core-shell cylinders or coreshell double gyroid morphologies can be obtained with S forming the core domains. [7][8][9][10] While in the blends of ABC with AB (or BC) presented so far only symmetric triblock terpolymers were used, here we present morphological investigations by transmission electron microscopy (TEM) on blends of asymmetric lamellar polybutadiene-block-polystyrene-block-poly(2-vinylpyridine) (BSV) with lamellar polystyrene-block-poly(2-vinylpyridine) (SV) and poly(cyclohexyl methacrylate)-block-poly(2-vinylpyridine) (CV) block copolymers at Communication: The formation of superlattices in blends of a series of asymmetric BSV triblock terpolymers and symmetric SVor VC diblock copolymers is investigated with S being polystyrene, B being poly(1,2-butadiene), V being poly(2-vinylpyridine), and C being poly(cyclohexyl methacrylate). All of these triblock terpolymers and diblock copolymers by themselves self-assemble into lamellae.…”

Morphological Control Over Three‐ and Four‐Phase Superstructures in Blends of Asymmetric ABC and BAC Triblock Terpolymers

“…Decorated morphologies, as for example, spheres on spheres, spheres on cylinder, cylinder on cylinder, are more difficult to achieve and less common as new blend structures. In literature, many examples for lamellae, gyroids, and core–shell structured blend morphologies can be found . Taken this into account, it is not against expectation to observe the same sequence in the transitions from core–shell double gyroid to core–shell cylinders and to core–shell spheres for both blend series.…”

“…The coexistence of two phases in binary mixtures of diblock copolymers has been calculated using the SCFT . The transition from one morphology into another by passing through coexisting morphologies has been predicted and proven for blends of ABC triblock terpolymers and AB diblock copolymers by Birshtein et al . We believe, new single blend structures (which differ from both starting structures) with high chain constraint are mostly avoided if two coexisting structures with less chain constraint are possible.…”

Functional Macromolecular Systems: Kinetic Pathways to Obtain Tailored Structures

“…The introduction of controlled radical polymerizations led to a strong increase in the number of block copolymers, which have been experimentally studied. Also controlling the dispersity of block copolymers and blending of block copolymers are possible ways to influence morphologies and also discover new ones which led to a number of experimental and theoretical studies . A number of hierarchical superstructures can be obtained by blending block copolymers with low molecular weight amphiphiles .…”