Functional Polystyrene Combs and Dendrigrafts, 1

✍ Scribed by Michel Schappacher; Julien Bernard; Alain Deffieux

• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: English
• Weight: 146 KB
• Volume: 204
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.200390044

✦ Synopsis

Abstract

Peripherally functionalized arborescent polystyrenes (PS) of various architectures and chain parameters (backbone DP~n~, number and DP~n~ of branches, number of termini and functions) were prepared by covalently assembling different elementary building blocks of controlled DP~n~, synthesized using anionic and cationic polymerization techniques. These multifunctional dendritic macromolecules have narrow polydispersities (< 1,2), and exhibit molar masses ranging from 1 × 10^5^ to 5 × 10^6^ g/mol for combs, and from 3 × 10^6^ to 13 × 10^6^ g/mol for dendrigrafts. In this latter series the number of terminal bis(hydroxymethyl) functions per macromolecule can be as high as 2 000. The calculated loading capacity (number of functional groups/g of polymer) was found to depend mainly on the molar mass of the last PS building block. It can approach 10^−3^ eq/g for low PS DP~n~ grafts (DP~n~ ≈ 10).

First generation dendrigrafts.

magnified imageFirst generation dendrigrafts.