Synthesis of a well-defined cyclic polystyrene via α-carboxyl, ω-amino heterodifunctional polystyrene

✍ Scribed by Masataka Kubo; Hirozumi Takeuchi; Tomoyuki Ohara; Takahito Itoh; Ritsuko Nagahata

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 167 KB
• Volume: 37
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(19990701)37:13<2027::aid-pola16>3.0.co;2-3

✦ Synopsis

Living anionic polymerization of styrene was carried out in benzene at room temperature using 1-(3-lithiopropyl)-4-methyl-2,6,7-trioxabicyclo[2.2.2]octane and 2,2,5,5-tetramethyl-1-(3-bromopropyl)-1-aza-2,5-disilacyclopentane as an initiator and terminator, respectively, to obtain ␣-2,2-bis(hydroxymethyl)propoxycarbonyl, -amino heterodifunctional polystyrene. It was hydrolyzed to ␣-carboxyl, -amino heterodifunctional polystyrene which gave a well-defined cyclic polystyrene by the intramolecular cyclization under high dilution conditions.