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Pseudo‐Living Anionic Telomerization of Buta‐1,3‐diene
Author(s) -
Saito Tomonori,
Harich Kim C.,
Long Timothy E.
Publication year - 2008
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200800249
Subject(s) - telomerization , protonation , dispersity , chemistry , polymer chemistry , chain transfer , diene , polymerization , living anionic polymerization , living polymerization , anionic addition polymerization , end group , radical polymerization , organic chemistry , catalysis , polymer , ion , natural rubber
Low‐molecular‐weight liquid polybutadienes (1 000–2 000 g · mol −1 ) consisting of 60 mol‐% poly(buta‐1,2‐diene) repeating units were synthesized via anionic telomerization. Maintaining the initiation and reaction temperature at less than 70 °C minimized chain transfer and enabled the polymerization to occur in a living fashion, which resulted in well‐controlled molecular weights and narrow polydispersity indices. MALDI‐TOF mass spectrometry confirmed that the end groups of liquid polybutadienes synthesized via anionic telomerization contained one benzyl end and one protonated end. In comparison, the end groups of liquid polybutadienes synthesized via living anionic polymerization contained one sec ‐butyl or butyl end and one protonated end.