Self-Assembly of Binary Mesocrystals from Blends of BABCB Multiblock Copolymers and ABC Triblock Copolymers

被引:24
作者
Liu, Meijiao [1 ]
Xia, Binkai [1 ]
Li, Weihua [1 ]
Qiu, Feng [1 ]
Shi, An-Chang [2 ]
机构
[1] Fudan Univ, Collaborat Innovat Ctr Polymers & Polymer Composi, State Key Lab Mol Engn Polymers, Dept Macromol Sci, Shanghai 200433, Peoples R China
[2] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada
基金
美国国家科学基金会; 国家高技术研究发展计划(863计划); 中国国家自然科学基金; 加拿大自然科学与工程研究理事会;
关键词
PHASE-BEHAVIOR; BLOCK-COPOLYMERS; DIBLOCK COPOLYMERS; ORDERED PHASES; HOMOPOLYMER; STABILITY; MORPHOLOGIES; ARCHITECTURE; LITHOGRAPHY; TRANSITION;
D O I
10.1021/acs.macromol.5b00529
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The phase behavior of binary blends composed of BABCB-type pentablock terpolymers and ABC-type triblock copolymers is investigated using the self-consistent field theory in the grand canonical ensemble. Specifically, the study is focused on how the simpler copolymers regulate the phase behavior of two sphere-forming multiblock copolymers of the type B(1)AB(2)CB(1) and AB(2)CB(3). For certain compositions, these two multiblock copolymers self-assemble to form mesocrystalline phases composed of binary A and C spheres with the ZnSC and ReO3 structures, respectively. It is discovered that the addition of symmetric ABC triblocks or AB diblocks to the two multiblock copolymers leads to the formation of different binary crystalline phases including symmetric binary crystalline phase of NaCl type for the A/C-component symmetric blends and asymmetric Cu2O, SnI4, TiO2, and CaF2 phases for the A/C-component asymmetric blends. In particular, the binary mesocrystals of the Cu2O and SnI4 structures observed in the blends of the tail-symmetric B(1)AB(2)CB(1) terpolymers and the AB diblock copolymers are new stable phases which have not been observed in the B(1)AB(2)CB(3) terpolymers melts. The theoretical results demonstrate that blending of block copolymers with specially designed multiblock terpolymers could provide an efficient route to fabricate binary mesocrystals.
引用
收藏
页码:3386 / 3394
页数:9
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