Constitutional Isomers of Dendrimer-like Star Polymers: Design

The relationship between Rg and molecular weight was indicative of a compact starlike structure, and did not show advanced bias toward either the dens...
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Macromolecules 2000, 33, 6423-6438

6423

Constitutional Isomers of Dendrimer-like Star Polymers: Design, Synthesis, and Conformational and Structural Properties Mikael Trollsås, Bjo1 rn Atthof, Andreas Wu 1 rsch, and James L. Hedrick* IBM Almaden Research Center, 650 Harry Road, San Jose, California 95120

John A. Pople Stanford Synchrotron Radiation Laboratory, Stanford Linear Accelerator Center, PO Box 4349, Stanford, California 94309

Alice P. Gast* Department of Chemical Engineering, Stanford University, Stanford, California 94305 Received February 22, 2000; Revised Manuscript Received May 23, 2000

ABSTRACT: The design, synthesis, and solution properties of six constitutional isomers of dendrimerlike star polymers is described. Each of the polymers have comparable molecular weights (∼80 000), narrow polydispersities (