Observation of chain stretching in Langmuir diblock copolymer monolayers
- 1 October 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review E
- Vol. 48 (4), R2354-R2357
- https://doi.org/10.1103/physreve.48.r2354
Abstract
We report observations of chain stretching in diblock copolymer monolayers on the surface of a selective solvent. Using neutron reflectivity, we have studied the concentration profile of the submerged block over a large range of surface density σ (chains per area) for two different molecular weights. The observed increase in the layer thickness is weaker than the prediction of mean-field and scaling theories for the limiting behavior, but is in agreement with recent numerical self-consistent-field calculations by Whitmore and Noolandi [Macromolecules 23, 3321 (1990)].
Keywords
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