The persistent radical effect in controlled radical polymerizations

✍ Scribed by Hanns Fischer

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 245 KB
• Volume: 37
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(19990701)37:13<1885::aid-pola1>3.0.co;2-1

✦ Synopsis

We describe the basic kinetic features of "living" polymerizations controlled and regulated by persistent radicals or related species and by reversible atom transfer. In these systems a special kinetic phenomenon operates-the Persistent Radical Ef-fect. It is also known from selective organic syntheses and reflects a self-inhibition of the termination reaction. Analytical equations for the polymerization rates and for the polydispersities of the resulting polymers are presented, and important requirements for reaction rate constants leading to control are outlined.