Gregory Czap, Kyungju Noh, et al.
APS Global Physics Summit 2025
The equilibrium segregation of deuterated polystyrene–poly(2-vinylpyridine) diblock copolymers to interfaces between high molecular weight polystyrene and poly(2-vinylpyridine) homopolymers was measured by forward recoil spectrometry. The dependence of the integrated segregation on the equilibrium copolymer concentration in the PS phase is compared to predictions from a mean-field theory in which the copolymer chemical potential is the relevant parameter. Predictions from the theory are quantitatively accurate for values of the copolymer chemical potential, which are below a certain limiting value associated with the formation of block copolymer micelles. The segregation behavior in the regime where micelles are present is complicated by a strong tendency for micelles to segregate to the free polystyrene surface and by a weaker tendency for micelles to segregate to the interfacial region. Values of the copolymer chemical potential at the micelle transition are obtained from a careful analysis of the data and are in reasonable agreement with predictions from a simplified theory of micelle formation. © 1990, American Chemical Society. All rights reserved.
Gregory Czap, Kyungju Noh, et al.
APS Global Physics Summit 2025
T.N. Morgan
Semiconductor Science and Technology
R.J. Gambino, N.R. Stemple, et al.
Journal of Physics and Chemistry of Solids
R.D. Murphy, R.O. Watts
Journal of Low Temperature Physics