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The Effect of Solvent Quality on Pathway-Dependent Solution-State Self-Assembly of an Amphiphilic Diblock Copolymer

Published

Author(s)

Vivek M. Prabhu, Kenneth Mineart, Guangmin Wei, James Hedrick, Yi Yan Yang, Shrinivas Venkataraman

Abstract

The cholesterol-functionalized polycarbonate-based diblock copolymer, PEG113-b-P(MTC-Chol)30, forms pathway-dependent nanostructures via dialysis-based solvent exchange. The initial organic solvent that dissolves or disperses the polymer dictates a self-assembly pathway. Depending upon the initial solvent, nanostructures of disk-like micelles, exhibiting asymmetric growth and hierarchical features are accessible from a single amphiphilic precursor. Dioxane and THF molecularly dissolves the block copolymer, but THF yields disks and dioxane stacked-disks. DMF and methanol display dispersed disks, then form stacked disk structure. The path-dependent morphology, correlated to solubility parameters, offers routes to tailor self-assemblies with limited sets of building blocks.
Citation
Journal of Applied Physics
Volume
127

Keywords

amphiphilic block copolymers, side-chain liquid crystalline polymer, hierarchical self-assembly, nanostructures, aliphatic polycarbonates, ring-opening polymerization
Created March 23, 2020, Updated March 29, 2020