Partition of Block Copolymers in Phase-Separating Polymer Solutions
| Autor: | Itaru Asano, Takahiro Sato |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Materials science 02 engineering and technology Surfaces and Interfaces Polymer Flory–Huggins solution theory Degree of polymerization 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering Polymerization Phase (matter) Electrochemistry Copolymer General Materials Science Polystyrene 0210 nano-technology Ethylene glycol Spectroscopy |
| Zdroj: | Langmuir. 37:6268-6277 |
| ISSN: | 1520-5827 0743-7463 |
| Popis: | The distribution of the AB diblock copolymer in a phase-separating solution composed of immiscible A and B homopolymers in a common solvent has been investigated theoretically. We have utilized the mixing Gibbs energy density for the interfacial phase based on mean-field lattice theory to this four-component system. Distributions of the AB diblock copolymer in the A and B homopolymer-rich bulk phases and the interfacial region between the separating bulk phases are calculated as a function of the B-block content, degrees of polymerization of the copolymer and A and B homopolymers, as well as interaction parameters among the A and B monomer units and the solvent. The copolymer prefers to distribute more in the interfacial region rather than separating bulk phases at a higher copolymer degree of polymerization and a higher interaction parameter between A and B monomer units. The theory is also compared with Asano et al.'s experimental results [ Langmuir 2015, 31, 7488-7495] for polystyrene-b-poly(ethylene glycol) copolymer added to the phase-separating solution of polystyrene and poly(ethylene glycol) homopolymers dissolved in chloroform. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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