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Block Copolymer Microdomain Morphologies by Phase Detection Imaging

Published online by Cambridge University Press:  10 February 2011

Ph. Leclère ,
J. M. Yu ,
R. Lazzaroni ,
Ph. Dubois ,
R. JéRôme  and
J. L. Brédas
Ph. Leclère
Affiliation:
Service de Chimie des Matériaux Nouveaux, Université de Mons-Hainaut, B-7000 Mons, Belgium.
J. M. Yu
Affiliation:
Center for Education and Research on Macromolecules (CERM), Université de Liège, Institut de Chimie, Bât B6a, B-4000 Sart-Tilman (Liège), Belgium.
R. Lazzaroni
Affiliation:
Service de Chimie des Matériaux Nouveaux, Université de Mons-Hainaut, B-7000 Mons, Belgium.
Ph. Dubois
Affiliation:
Center for Education and Research on Macromolecules (CERM), Université de Liège, Institut de Chimie, Bât B6a, B-4000 Sart-Tilman (Liège), Belgium.
R. JéRôme
Affiliation:
Center for Education and Research on Macromolecules (CERM), Université de Liège, Institut de Chimie, Bât B6a, B-4000 Sart-Tilman (Liège), Belgium.
J. L. Brédas
Affiliation:
Service de Chimie des Matériaux Nouveaux, Université de Mons-Hainaut, B-7000 Mons, Belgium.
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Abstract

Atomic Force Microscopy with Phase Detection Imaging is used to study the surface microdomain morphology of thick (i.e., ca. 2 mm) films of triblock copolymers, such as polymethylmethacrylate - block - polybutadiene - block - polymethylmethacrylate copolymers prepared by a well-taylored two-step sequential copolymerization promoted by a 1,3-diisopropenylbenzene based difunctional anionie initiator. By means of this new scanning probe microscopy technique, it is shown that the surface exhibits a segregated microphase structure, corresponding to the different types of components predicted theoretically by thermodynamic processes. We investigate the relationships between the size and characteristics of the microdomain structure as a function of the molecular parameters of the constituent polymers. Our data illustrate the interest of Phase Detection Imaging in the elucidation of surface phase separation in block copolymers.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 461: Symposia BB – Morphological Control in Multiphase Polymer Mix… , 1996 , 57
Copyright
Copyright © Materials Research Society 1997

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References

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