Suzuki Makoto, Suzuki Jiro, Takano Atsushi, Matsushita Yushu
Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
Computing Research Center, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan.
ACS Macro Lett. 2021 Mar 16;10(3):359-364. doi: 10.1021/acsmacrolett.1c00012. Epub 2021 Feb 15.
Three kinds of hexagonally packed cylindrical (HPC) structures with 10/8 satellites have been found from a neat pentablock quarterpolymer of the ASISP type, composed of poly(4-vinylbenzyldimethylamine) (A), polystyrene (S), polyisoprene (I), and poly(2-vinylpyridine) (P), and block polymer/homopolymer blends. ASISP-2 ( = 276k, ϕ/ϕ/ϕ/ϕ/ϕ = 0.08/0.17/0.12/0.33/0.30) shows HPC of P with 10 single-arrayed I satellites and 6 A subsatellites in the S matrix, where the I/P ratio number is 5, while ASISP-2 ( = 325k, ϕ/ϕ/ϕ/ϕ/ϕ = 0.07/0.31/0.14/0.18/0.30)/S(;11k) = 90/10 blend reveals another HPC of P with 10 I satellites, giving an I/P ratio of 6, whose array of I is a single/double mixture. Moreover, ASISP-1/S/A(;9k) = 90/5/5 blend represents two enantiomeric HPC packings with 8 double-arrayed I satellites having an I/P ratio of 7, which can be considered to be approximants of two enantiomeric 3.3.3.3.6 Archimedean tilings. These structures were conceived to be formed by the enhanced miscibility of tail A-chains with added homopolymers, resulting in an increase of the (A + S)/I interaction leading to the split of I domains.
从一种纯净的ASISP型五嵌段四聚物以及嵌段聚合物/均聚物共混物中发现了三种具有10/8卫星结构的六方堆积圆柱（HPC）结构。该五嵌段四聚物由聚（4-乙烯基苄基二甲基胺）（A）、聚苯乙烯（S）、聚异戊二烯（I）和聚（2-乙烯基吡啶）（P）组成。ASISP-2（= 276k，ϕ/ϕ/ϕ/ϕ/ϕ = 0.08/0.17/0.12/0.33/0.30）在S基质中显示出P的HPC结构，其中有10个单排列的I卫星和6个A亚卫星，I/P比数为5，而ASISP-2（= 325k，ϕ/ϕ/ϕ/ϕ/ϕ = 0.07/0.31/0.14/0.18/0.30）/S（；11k）= 90/10共混物揭示了另一种P的HPC结构，有10个I卫星，I/P比为6，其I的排列是单/双混合物。此外，ASISP-1/S/A（；9k）= 90/5/5共混物代表了两种对映体HPC堆积，有8个双排列的I卫星，I/P比为7，可被认为是两种对映体3.3.3.3.6阿基米德镶嵌的近似物。这些结构被认为是由尾部A链与添加的均聚物的增溶作用形成的，导致（A + S）/I相互作用增加，从而导致I域的分裂。
