Synthesis of functionalized double-cylinder-type copolymer brushes and crosslinking of internal cylindrical domains

✍ Scribed by Koji Ishizu; Satoshi Takano; Koichiro Ochi

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 142 KB
• Volume: 104
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.26030

✦ Synopsis

Abstract

Photoinduced atom transfer radical polymerization (ATRP) was applied to the synthesis of double‐cylinder‐type copolymer brushes. The procedure included the following steps: (1) photoinduced ATRP of multifunctional polystyrene (PSDC) having N,N‐diethyldithiocarbamate (DC) pendant groups with t‐butyl acrylate (BA) and (2) subsequent photoinduced ATRP of methyl methacrylate (MMA) with this PBA brush polyinitiator provided double‐cylinder‐type brushes [PSDC‐graft‐(PBA‐block‐PMMA)]. Solution properties of such double‐cylinder‐type brushes were investigated by dynamic light scattering. As a result, these copolymer brushes exhibited an isotropic conformation in solution. After hydrolysis of PBA blocks, we obtained amphiphilic copolymer brushes: PSDC‐graft‐[poly(acrylic acid) (PAA)__‐block‐__PMMA]. Crosslinking of PAA internal cylindrical domains was performed by the reaction of PAA blocks with ethylenediamine. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 3994–4000, 2007