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Organolithium‐induced anionic polymerization of 1,1,3,3‐tetramethyl‐1,3‐disilacyclobutane in the presence of hexamethylphosphoramide
Author(s) -
Matsumoto Kozo,
Nishimura Masaki,
Yamaoka Hitoshi
Publication year - 2000
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/(sici)1521-3935(20000401)201:7<805::aid-macp805>3.0.co;2-3
Subject(s) - hexamethylphosphoramide , chemistry , polymerization , chain transfer , polymer chemistry , polymer , anionic addition polymerization , kinetic chain length , methylene , photochemistry , radical polymerization , organic chemistry
1,1,3,3‐Tetramethyl‐1,3‐disilacyclobutane ( TMDSCB ) was polymerized by addition of alkyllithium as initiator in THF at –78°C in the presence of hexamethylphosphoramide (HMPA). The yield and molecular weight of the obtained polymer strongly depended on the amount of initiator and HMPA. It was confirmed that the polymerization proceeded along with a proton abstraction from the methylene group of the repeated unit, which caused chain termination, while no chain transfer appears to be involved.