3212
Macromolecules 2000, 33, 3212-3218
Controlled Synthesis of Hyperbranched Polymers by Slow Monomer Addition to a Core P. Bharathi and Jeffrey S. Moore* Departments of Chemistry and Materials Science & Engineering and The Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 Received December 3, 1999; Revised Manuscript Received February 14, 2000 ABSTRACT: Continuous, slow addition of AB2 monomer (3,5-diiodophenylacetylene) to a solution of a multifunctional core results in high molecular weight hyperbranched phenylacetylene polymers with narrow polydispersites. Control over the molecular weight (Mw ) 8-90 kDa) was achieved by varying the monomer:core ratio from 17.5 to 560. At low ratios (