Observation of chain stretching in Langmuir diblock copolymer monolayers

Bradford J. Factor; Lay-Theng Lee; Michael S. Kent; Francis Rondelez

doi:10.1103/PhysRevE.48.R2354

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Observation of chain stretching in Langmuir diblock copolymer monolayers

Laboratoire de Physico-Chimie des Surfaces et Interfaces, Section de Physique et Chimie, Institut Curie, 11 rue Pierre et Marie Curie, 75005 Paris, France

Laboratoire Léon Brillouin, CE-Saclay, 91191 Gif-sur-Yvette Cedex, France

Department 1815, Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185

Laboratoire de Physico-Chimie des Surfaces et Interfaces, Section de Physique et Chimie, Institut Curie, 11 rue Pierre et Marie Curie, 75005 Paris, France

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Phys. Rev. E 48, R2354(R) – Published 1 October, 1993

DOI: 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 $σ^{1 / 3}$ 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)].

References (19)

For a review, see A. Halperin et al., Adv. Poly. Sci. 100, 31 (1992).
T. Cosgrove, J. Chem. Soc. Faraday Trans. 86, 1323 (1990).
P. Auroy et al., Phys. Rev. Lett. 66, 719 (1991).
P. Auroy et al., Phys. Rev. Lett. 69, 93 (1992).
P. Auroy et al., Macromolecules 24, 5158 (1991).
T. Cosgrove et al., Macromolecules 24, 94 (1991).
S. Patel et al., Proc. Natl. Acad. Sci. U.S.A. 84, 4725 (1987).
E. E. Parsonage et al. Macromolecules 24, 1987 (1991).
J. B. Field et al., Macromolecules 25, 434 (1992).
J. B Field et al., J. Phys. II France 2, 2221 (1992).
S. Alexander, J. Phys. (Paris) 38, 983 (1977).
S. T. Milner et al., Europhys. Lett. 5, 413 (1988); , Macromolecules 21, 2610 (1988).
M. Murat M. and G. Grest, Macromolecules 22, 4054 (1989).
M. D. Whitmore and J. Noolandi, Macromolecules 23, 3321 (1990).
M. S. Kent et al., Macromolecules 25, 6240 (1992).
A description of this method is given in T. P. Russell, Mat. Sci. Rep. 5, 171 (1990).
M. Muthukumar and J.-S. Ho, Macromolecules 22, 965 (1989).
A. Chakrabarti and R. Toral, Macromolecules 23, 2016 (1990).
$σ^{star}$ was determined using $R_{g}$ =0.117 ( $M_{PS}$ $)^{0.595}$ . This is discussed further in Ref. [15].

[c1] For a review, see A. Halperin et al., Adv. Poly. Sci. 100, 31 (1992).

[c2] T. Cosgrove, J. Chem. Soc. Faraday Trans. 86, 1323 (1990).

[c3] P. Auroy et al., Phys. Rev. Lett. 66, 719 (1991).

[c4] P. Auroy et al., Phys. Rev. Lett. 69, 93 (1992).

[c5] P. Auroy et al., Macromolecules 24, 5158 (1991).

[c6] T. Cosgrove et al., Macromolecules 24, 94 (1991).

[c7] S. Patel et al., Proc. Natl. Acad. Sci. U.S.A. 84, 4725 (1987).

[c8] E. E. Parsonage et al. Macromolecules 24, 1987 (1991).

[c9] J. B. Field et al., Macromolecules 25, 434 (1992).

[c10] J. B Field et al., J. Phys. II France 2, 2221 (1992).

[c11] S. Alexander, J. Phys. (Paris) 38, 983 (1977).

[c12] S. T. Milner et al., Europhys. Lett. 5, 413 (1988); , Macromolecules 21, 2610 (1988).

[c13] M. Murat M. and G. Grest, Macromolecules 22, 4054 (1989).

[c14] M. D. Whitmore and J. Noolandi, Macromolecules 23, 3321 (1990).

[c15] M. S. Kent et al., Macromolecules 25, 6240 (1992).

[c16] A description of this method is given in T. P. Russell, Mat. Sci. Rep. 5, 171 (1990).

[c17] M. Muthukumar and J.-S. Ho, Macromolecules 22, 965 (1989).

[c18] A. Chakrabarti and R. Toral, Macromolecules 23, 2016 (1990).

[c19] $σ^{star}$ was determined using $R_{g}$ =0.117 ( $M_{PS}$ $)^{0.595}$ . This is discussed further in Ref. [15].

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Observation of chain stretching in Langmuir diblock copolymer monolayers

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