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- W2885803323 abstract "We report a blending mechanism of polystyrene-b-poly(ethylene oxide) (PS-b-PEO) and PS homopolymer (homoPS) at the air/water interface. Our blending mechanism is completely different from the well-known “wet–dry brush theory” for bulk blends; regardless of the size of homoPS, the domain size increased and the morphology changed without macrophase separation, whereas the homoPS of small molecular weight (MW) leads to a transition after blending into the block copolymer domains, and the large MW homoPS is phase-separated in bulk. The difference in blending mechanism at the interface is attributed to adsorption kinetics at a water/spreading solvent interface. Upon spreading, PS-b-PEO is rapidly adsorbed to the water/spreading solvent interface and forms domain first, and then homoPS accumulates on them as the solvent completely evaporates. On the basis of our proposed mechanism, we demonstrate that rapid PS-b-PEO adsorption is crucial to determine the final morphology of the blends. We additionally found that spreading preformed self-assemblies of the blends slowed down the adsorption, causing them to behave similar to bulk blends, following the “wet–dry brush theory”. This new mechanism provides useful information for various block copolymer-homopolymer blending systems with large fluid/fluid interfaces such as emulsions and foams." @default.
- W2885803323 created "2018-08-22" @default.
- W2885803323 creator A5004297961 @default.
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- W2885803323 date "2018-08-10" @default.
- W2885803323 modified "2023-09-30" @default.
- W2885803323 title "Blending Mechanism of PS-<i>b</i>-PEO and PS Homopolymer at the Air/Water Interface and Their Morphological Control" @default.
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- W2885803323 doi "https://doi.org/10.1021/acs.langmuir.8b02192" @default.
- W2885803323 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30095262" @default.
- W2885803323 hasPublicationYear "2018" @default.
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