ITP OpenIR  > SCI期刊论文
Zheng, LF; Wu, JQ; Wang, Z; Yin, YH; Jiang, R; Li, BH; Li, BH (reprint author), Nankai Univ, Sch Phys, Minist Educ, Key Lab Funct Polymer Mat, Tianjin 300071, Peoples R China.; Li, BH (reprint author), Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300071, Peoples R China.; Li, BH (reprint author), Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China.
Phase behavior of ABC-type triple-hydrophilic block copolymers in aqueous solutions
Source PublicationEUROPEAN PHYSICAL JOURNAL E
Language英语
AbstractThe phase behavior of symmetric ABC triple-hydrophilic triblock copolymers in concentrated aqueous solutions is investigated using a simulated annealing technique. Two typical cases, in which the hydrophilicity of the middle B-block is either stronger or weaker than that of the end A-and C-blocks, are studied. In these two cases, a variety of phase diagrams are constructed as a function of the volume fraction of the B-block and the copolymer concentration (Phi) for both non-frustrated and frustrated copolymers. Structures, such as two-color alternatingly packed cylinders or gyroid, and lamellae-in-lamellae etc. that do not occur in the melt system, are obtained in solutions. Rich phase transition sequences, especially re-entrant phase transitions involving complex continuous networks of alternating gyroid and alternating diamond are observed for a given copolymer with decreasing Phi. The difference in hydrophilicity among different blocks can result in inhomogeneous distribution of solvent molecules in the morphology, and with the decrease of Phi, the distribution of solvent molecules presents a non-monotonic variation. This results in a non-monotonic variation of the effective volume fraction of each domain with the decrease of Phi, which induces the re-entrant phase transitions. The presence of a good solvent for all the blocks can cause changes in the effective segregation strengths between different blocks and also in chain conformations, hence can alter the bulk phases and results in the occurrence of new structures and phase transitions. Especially, structures having A-C interfaces or A-C mixed domains can be obtained even in the non-frustrated copolymer systems, and structures obtained in the frustrated systems may be similar to those obtained in the non-frustrated systems. The window of the alternating gyroid structures may occupy a large part of the phase diagram for non-frustrated copolymers with stronger B-hydrophilicity. This behavior can be used to tune the self-assembled structures of block copolymers.
2016
Volume39Issue:7Pages:75
Subject AreaChemistry ; Materials Science ; Physics ; Polymer Science
DOIhttp://dx.doi.org/10.1140/epje/i2016-16075-8
Indexed BySCI
Funding OrganizationNational Natural Science Foundation of China [21574071, 21528401, 20990234, 20925414, 91227121] ; National Natural Science Foundation of China [21574071, 21528401, 20990234, 20925414, 91227121] ; National Natural Science Foundation of China [21574071, 21528401, 20990234, 20925414, 91227121] ; National Natural Science Foundation of China [21574071, 21528401, 20990234, 20925414, 91227121] ; PCSIRT [IRT1257] ; PCSIRT [IRT1257] ; PCSIRT [IRT1257] ; PCSIRT [IRT1257] ; 111 Project ; 111 Project ; 111 Project ; 111 Project
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/21585
CollectionSCI期刊论文
Corresponding AuthorLi, BH (reprint author), Nankai Univ, Sch Phys, Minist Educ, Key Lab Funct Polymer Mat, Tianjin 300071, Peoples R China.; Li, BH (reprint author), Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300071, Peoples R China.; Li, BH (reprint author), Chinese Acad Sci, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Zheng, LF,Wu, JQ,Wang, Z,et al. Phase behavior of ABC-type triple-hydrophilic block copolymers in aqueous solutions[J]. EUROPEAN PHYSICAL JOURNAL E,2016,39(7):75.
APA Zheng, LF.,Wu, JQ.,Wang, Z.,Yin, YH.,Jiang, R.,...&Li, BH .(2016).Phase behavior of ABC-type triple-hydrophilic block copolymers in aqueous solutions.EUROPEAN PHYSICAL JOURNAL E,39(7),75.
MLA Zheng, LF,et al."Phase behavior of ABC-type triple-hydrophilic block copolymers in aqueous solutions".EUROPEAN PHYSICAL JOURNAL E 39.7(2016):75.
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