First Nitroxide-Mediated Controlled/Living Free Radical Polymerization in an Ionic Liquid

✍ Scribed by Julia Ryan; Fawaz Aldabbagh; Per B. Zetterlund; Bunichiro Yamada

• Publisher: John Wiley and Sons
• Year: 2004
• Tongue: English
• Weight: 124 KB
• Volume: 25
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/marc.200400006

✦ Synopsis

Abstract

Summary: The controlled/living radical polymerizations of methyl acrylate in 50% v/v of an ionic liquid initiated by the alkoxyamine generated in situ from 4‐oxo‐2,2,6,6‐tetramethyl‐1‐piperidinyl‐N‐oxyl (4‐oxo‐TEMPO) and 2,2′‐azoisobutyronitrile (AIBN) at 140–155 °C are reported. The number‐average molecular weights increased linearly with conversion, and polydispersity indices are approximately 1.4 in the best case. The rates of polymerization were greater than in anisole, and similar to the rate of spontaneous polymerization in the ionic liquid.

$\overline M _{\rm n}$ (filled symbols) and $\overline M _{\rm w} /\overline M _{\rm n}$ (open symbols) vs. conversion for the MA polymerization in the presence of [4‐oxo‐TEMPO]/[AIBN] (2.8:1) in 50% v/v anisole with 0.03 M AIBN (squares) and 50% v/v [hmim][PF~6~] with 0.03 M AIBN (circles), and 0.06 M AIBN (triangles).

image$\overline M _{\rm n}$ (filled symbols) and $\overline M _{\rm w} /\overline M _{\rm n}$ (open symbols) vs. conversion for the MA polymerization in the presence of [4‐oxo‐TEMPO]/[AIBN] (2.8:1) in 50% v/v anisole with 0.03 M AIBN (squares) and 50% v/v [hmim][PF~6~] with 0.03 M AIBN (circles), and 0.06 M AIBN (triangles).