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Phase Behavior of Ordered Diblock Copolymer Blends: Effect of Compositional Heterogeneity
 

Summary: Phase Behavior of Ordered Diblock Copolymer Blends: Effect of
Compositional Heterogeneity
Richard J. Spontak,*, Jennifer C. Fung, Michael B. Braunfeld,
John W. Sedat, David A. Agard, Lisaleigh Kane, Steven D. Smith,*,|
Michael M. Satkowski,| Arman Ashraf,| Damian A. Hajduk,, and
Sol M. Gruner
Department of Materials Science and Engineering, North Carolina State University,
Raleigh, North Carolina 27695, Graduate Group in Biophysics, University of California,
San Francisco, California 94143, Department of Biochemistry and Biophysics and
the Howard Hughes Medical Institute, University of California,
San Francisco, California 94143, Corporate Research Division, The Procter & Gamble
Company, Cincinnati, Ohio 45239, and Department of Physics, Princeton University,
Princeton, New Jersey 08544
Received October 24, 1995; Revised Manuscript Received January 17, 1996X
ABSTRACT: Diblock copolymers order into a variety of periodic morphologies when the constituent blocks
are sufficiently incompatible. Previous studies have demonstrated that classical dispersion (spherical
and cylindrical) and lamellar morphologies, as well as complex morphologies (e.g., gyroid*, lamellar
catenoid, and hexagonally perforated lamellae), can be selectively accessed through either tailored
molecular synthesis or copolymer/homopolymer blends. In the present work, control over ultimate
morphology is achieved through the use of binary copolymer blends composed of two strongly-segregated

  

Source: Agard, David - Department of Biochemistry and Biophysics, University of California at San Francisco

 

Collections: Biotechnology; Biology and Medicine