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- W1989367922 endingPage "4851" @default.
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- W1989367922 abstract "Aggregation behaviors, in particular, surface micelle formation, of a diblock copolymer A−B, where the A block is polystyrene (PS, surface inactive and water insoluble) and the B block is poly(methyl methacrylate) (PMMA, surface active, but water insoluble), at the air/water interface have been examined. The block length ratio of PS:PMMA was 140K:646K. With the aid of a Langmuir film balance and an atomic force microscope (AFM), surface pressure isotherms, as well as the hysteresis and temperature effects on the isotherms and aggregation numbers, were determined, and a self-consistent picture of the surface morphology and the aggregation phenomena was obtained. Analogous to the critical micelle concentration in a bulk solution of a surfactant, the surface aggregation of the block copolymer took place only at a certain surface mass density and resulted in small circular micelles with an aggregation number around 6−7, as determined by AFM. The small aggregation number is attributed to the longer block length of PMMA relative to that of PS." @default.
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- W1989367922 date "2001-06-07" @default.
- W1989367922 modified "2023-09-23" @default.
- W1989367922 title "Aggregation Behaviors of a Polystyrene-<i>b</i>-poly(methyl methacrylate) Diblock Copolymer at the Air/Water Interface" @default.
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- W1989367922 doi "https://doi.org/10.1021/ma002119y" @default.
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