Four-Phase Triple Coaxial Cylindrical Microdomain Morphology in a Linear Tetrablock Quaterpolymer of Styrene, Isoprene, Dimethylsiloxane, and 2-Vinylpyridine

Block Copolymers as a Tool for Nanomaterial Fabrication

“…Also for this reason, more recent efforts have focused on ordered structures obtained from BCs having both rigid and flexible segments, [8] and also from triblock and even tetrablock copolymers, with the observation of a series of novel and unconventional morphologies such as zig±zag, [9] core±shell double gyroid, [10] spheres or rods between lamellae, [11] helices around cylinders, [12] and hexagonal double [10] or triple [13] coaxial cylinder structures. A few of these morphologies, the ones most frequently used for nanofabrication, are illustrated schematically in Figure 1.…”

Formation of superlattices in blends of 3-miktoarm star terpolymers with diblock copolymers

“…Block copolymers show microphase-separated morphologies on this length scale and thus are an important class of materials. Investigations have been carried out on the morphologies, both for linear systems like AB block copolymers [4], ABC triblock terpolymers [5,6], or ABCD tetrablock quaterpolymers [7], as well as on other systems with non-linear topologies like AB miktoarm copolymers [8], or ABC miktoarm star terpolymers [9]. Also blending of linear block copolymers as another strategy to control morphology was used successfully [10,11].…”

Morphology of ABCD Tetrablock Copolymers Predicted by Self‐Consistent Field Theory

“…[21] There is a small region with the middle C or D block as a main part, in which the core-shell hexagonal phase (CSH) forms, which is different from the CS 3 H phase with the majority of block A (or D). The blocks, C and D, form the matrix, and the block A forms the core and the block B the shell.…”

“…Until now, the morphologies and the phase diagrams for AB diblock copolymers, linear ABC triblock copolymer, and even ABC threemiktoarm copolymers have been intensively studied theoretically and experimentally. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] Moreover, the more complicated block copolymers, such as those of linear ABCA, [20] ABCD, [21][22][23][24][25] ABCDE [23] types, and ABCD four-miktoarm star copolymer, [26] have been synthesized. Among these complicated tetrablock copolymers, only the morphology of the linear ABCA tetrablock copolymers has been studied theoretically; [27,28] a substitution of the end block A by a different block D, such as is the case Summary: We studied the two-dimensional (2D) microphase-separated morphology of linear ABCD tetrablock copolymers by self-consistent field theory.…”

“…Hadjichristidis et al [21,22,29] synthesized the complex ABCD tetrablock copolymer; a four-phase, triple coaxial cylindrical morphology, and a four-phase six-layer lamellar structure were observed. Even an order-to-order (cylinder !…”