Stabilization of the perforated lamellar microstructure in block copolymers with asymmetric block polydispersity

PMSE 31

Jessica Listak, JListak@cmu.edu1, Wojciech Jakubowski, wjakubowski@atrpsolutions.com2, Laura Mueller, lmueller@andrew.cmu.edu3, Krzysztof Matyjaszewski, km3b@andrew.cmu.edu3, and Michael Bockstaller1. (1) Department of Materials Science and Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213, (2) ATRP Solutions, Inc, 166 N. Dithridge Street, Suite G4, Pittsburgh, PA 15213, (3) Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213
Understanding of the relevance of block polydispersity on the microstructure formation and properties of block copolymers (BCP) will be vital if the full potential of synthetic techniques such as controlled radical polymerization is to be developed. Recent advances in the field of controlled radical polymerization present new opportunities by expanding the possibilities to tailor the characteristics of BCP by facilitating precise control of the block polydispersities (PDI). Here we demonstrate that the introduction of block polydispersity within the minority domain of a cylindrical (C) polystyrene-b-poly(methyl acrylate) (PS-PMA) copolymer in the intermediate segregation regime results in the stabilization of a perforated lamellar (PL) morphology that is retained even under prolonged thermal annealing.
 

Synthesis and Self-Assembly Approaches to Polymer-Inorganic Hybrid Nanoparticles
1:30 PM-4:50 PM, Sunday, April 6, 2008 Hilton New Orleans Riverside -- Grand Salon 24, Oral

Division of Polymeric Materials: Science & Engineering

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008