Premium
Living Anionic Polymerization of Benzofulvene in Hydrocarbon Solvent
Author(s) -
Kosaka Yuki,
Goseki Raita,
Kawauchi Susumu,
Ishizone Takashi
Publication year - 2015
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201400024
Subject(s) - benzene , monomer , isoprene , copolymer , polymer chemistry , polymerization , anionic addition polymerization , molar mass distribution , solvent , yield (engineering) , chemistry , hydrocarbon , materials science , organic chemistry , polymer , metallurgy
Summary Anionic polymerization of benzofulvene ( BF ) quantitatively proceeded with sec ‐BuLi in benzene at 0∼55 °C. The resulting poly( BF ) s possessed predicted molecular weights based on the molar ratios between monomer and initiator and narrow molecular weight distributions ( M w / M n < 1.1). The result of postpolymerization demonstrated that the propagating chain end anion of poly( BF ) was stable in benzene at 0 °C for at least 1 h. Anionic sequential copolymerization of isoprene and BF was also performed in benzene to afford a well‐defined polyisoprene‐ b ‐poly( BF ) in quantitative yield. The 13 C NMR analysis revealed that the poly( BF ) obtained with sec ‐BuLi in benzene at 0 °C possessed 76% of the 1,4‐structure and 24% of the 1,2‐structure.