Binary Blends of Diblock Copolymers: An Effective Route to Novel Bicontinuous Phases

被引：20

作者：

Lai, Chi To ^{[1
]}

Shi, An-Chang ^{[1
]}

机构：

[1] McMaster Univ, Dept Phys & Astron, 1280 Main St W, Hamilton, ON L8S 4M1, Canada

来源：

MACROMOLECULAR THEORY AND SIMULATIONS | 2021年 / 30卷 / 03期

基金：

加拿大自然科学与工程研究理事会;

关键词：

bicontinuous phases; block copolymer self‐ assembly; disperse polymers; polymer blends;

D O I：

10.1002/mats.202100019

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 formation of various bicontinuous phases from binary blends of linear AB diblock copolymers (DBCPs) is studied using the polymeric self-consistent field theory. The theoretical study predicts that the double diamond and the "plumber's nightmare" phases, which are metastable for neat DBCPs, could be stabilized in block copolymers with designed dispersity, namely, binary blends composed of a gyroid-forming DBCP and a homopolymer-like DBCP. The spatial distribution of different monomers reveals that these two types of DBCPs are segregated such that the homopolymer-like component is localized at the nodes to relieve the packing frustration. Simultaneously, the presence of a local segregation of the two DBCPs on the AB interface regulates the interfacial curvature. These two mechanisms could act in tandem for homopolymer-like DBCPs with proper compositions, resulting in larger stable regions for the novel bicontinuous phases.

引用

页数：9

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