Synthesis of polymers containing conjugated dienyl end-groups by means of anionic living polymerization

✍ Scribed by Takahide Mizawa; Katsuhiko Takenaka; Tomoo Shiomi

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 154 KB
• Volume: 37
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(19990901)37:17<3464::aid-pola4>3.0.co;2-g

✦ Synopsis

In order to synthesize end-functionalized polymers with conjugated dienyl groups, living polymeric anions of polystyrene and polyisoprene were allowed to react with 5-bromo-1,3-pentadiene, 1, and 7-bromo-1,3-heptadiene, 2. The reaction of polystyryl anion and/or polyisoprenyl anion with 1 gave polymers whose end-functionalities were 65-80% regardless of the reaction conditions. On the other hand, almost quantitative functionalization was achieved when a large excess amount of 2 was used as a terminator. When 1,1-diphenylalkyl anion and enolate anion derived from t-butyl methacrylate were used, the degree of end-functionality were 70 -80% at best. The resulting end-functionalized polymers were characterized by size exclusion chromatography (SEC), 1 H and 13 C-NMR and thin layer chromatography coupled with a flame ionization detector (TLC-FID).