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A New Cylindrical Structure from ABCBD Pentablock Quadpolymer Melt Studied by Monte Carlo Simulation
Author(s) -
Suzuki Jiro,
Takano Atsushi,
Matsushita Yushu
Publication year - 2020
Publication title -
macromolecular theory and simulations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 56
eISSN - 1521-3919
pISSN - 1022-1344
DOI - 10.1002/mats.202000029
Subject(s) - monte carlo method , volume fraction , phase (matter) , crystallography , block (permutation group theory) , matrix (chemical analysis) , materials science , range (aeronautics) , domain (mathematical analysis) , combinatorics , physics , chemistry , mathematics , mathematical analysis , composite material , statistics , quantum mechanics
Abstract Morphology of AB 0 CB 1 D pentablock quadpolymers in melt is studied by Monte Carlo simulation, where B 0 and B 1 are the same polymer component. When the volume fractions of the two end‐blocks, φ A , φ D , and that of mid‐block, φ C are all small, the B‐domain forms matrix phase, whereas the A‐, C‐, and D‐chains stay as cylindrical domains. A tetragonally packed cylindrical structure is observed in the composition range of 0.125 ≤ φ C ≤ 0.188 at φ A = φ D = 0.125 and γ = 1.0, wherein γ is the volume fraction ratio of two B‐chains, that is, γ = φ B 0 /φ B 1 , defined as a symmetric factor. Another complex but periodic cylindrical structure is found at φ A = φ D = 0.125 and φ C = 0.188 with quite wider γ range of 0.38 ≤ γ ≤ 0.64. By connecting D‐domains, this structure can be classified as the 3.3.4.3.4 Archimedean tiling, which is composed of imaginary regular triangles and squares. It should be noted that γ range of 3.3.4.3.4 phase is much wider for the present AB 0 CB 1 D pentablock quadpolymers than that for the AB 0 CB 1 tetrablock terpolymers. In addition, the A‐domains have been found to display the periodic Cairo pentagonal tiling by drawing auxiliary connect lines.