Monolayers of Linear Macromolecules

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Abstract
A model is proposed for monolayers composed of linear macromolecules, particularly at an oil/water interface. If the polymer at the interface is sufficiently flexible, the layer will consist of anchored portions connected by bridges of segments lying out of the plane in which the anchored segments are deposited. An equation of state for the monolayer is derived and its limiting form is compared with those due to Singer and Bull. The limiting form of our equation of state seems to be in satisfactory agreement with some published experimental data. These results suggest the possibility of obtaining rough indications of the shape and mean dimensions of the macromolecule at the interface from film studies at both the air/water and oil/water interface. Finally the application of this model to explain the apparent dissociation of protein monolayers is indicated.

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