Supramolecular Self-assembly Behaviors of Asymmetric Diblock Copolymer Blends with Hydrogen Bonding Interactions between Shorter Blocks Modelled by Yukawa Potentials  

作　　者：Xu Zhang Jialiang Chen Lin Xu Tianxi Liu 

机构地区：[1]Innovation Center for Textile Science and Technology,State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,College of Materials Science and Engineering,Donghua University,Shanghai 201620,China [2]National Garment and Accessories Quality Supervision Testing Center(Fujian),Fujian Provincial Key Laboratory of Textiles Inspection Technology,Fujian Fiber Inspection Center,Fuzhou 350026,China [3]Key Laboratory of Synthetic and Biological Colloids,Ministry of Education,School of Chemical and Material Engineering,Jiangnan University,Wuxi 214122,China

出　　处：《Chinese Journal of Polymer Science》2021年第11期1502-1509,共8页高分子科学（英文版）

基　　金：financially supported by the Natural Science Foundation of Shanghai(No.21ZR1402800);the Fundamental Research Funds for the Central Universities(No.2232020D-11);the China Postdoctoral Science Foundation(No.2021M690597);the Open Project Program of Fujian Provincial Key Laboratory of Textiles Inspection Technology(Fujian Fiber Inspection Center)(Nos.2020-MXJ-04)。

摘　　要：We employed the extended self-consistent field theory to investigate the supramolecular self-assembly behaviors of asymmetric diblock copolymer blends(AB/B’C)with hydrogen bonding interactions between shorter B and B’blocks.The hydrogen bonding interactions are described by Yukawa potentials,where the hydrogen bonding donors and acceptors were modelled as two blocks smeared with opposite screened charges.The hierarchical microstructures with parallelly packed lamellae-in-lamellae(Lam)and 4.8.8 Archimedean tilting pattern(4.8.8)were observed at lower and higher hydrogen bonding density(θ),respectively.The hierarchy of Lam and 4.8.8 were demonstrated by the one-and two-dimensional density profiles and the underlying order of the large-length-scale and small-length-scale microstructures were also clarified.It was found that the 4.8.8 is favorable to the stronger hydrogen bonding density or interactions.Asθincreases,the microphase transition from Lam to 4.8.8 occurs atθ=0.34,which is mainly attributed to the optimization of the electrostatic energy and conformational entropy with sacrificing the interfacial energy.This work can provide a new strategy to understand the supramolecular self-assembly as well as the mechanism behind the formation of complex hierarchical microstructures.

关 键 词：Supramolecular self-assembly Hydrogen bond Block copolymer Self-consistent field theory Hierarchical microstructure 

分 类 号：O641.3[理学—物理化学] TQ317[理学—化学]