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Reactivity of lactams in anionic polymerization
Author(s) -
Sebenda Jan
Publication year - 1986
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19860060104
Subject(s) - polymerization , monomer , polymer , lactam , polymer chemistry , anionic addition polymerization , reactivity (psychology) , chemistry , solvent , ionic polymerization , ring opening polymerization , organic chemistry , radical polymerization , medicine , alternative medicine , pathology
The rate of anionic lactam polymerization is greatly affected by variation of the permittivity of lactams with ring size and substitution, as well as by changes of permittivity during polymerization. Therefore, an estimation of reactivities under comparable conditions is possible in solution only. The lack of any solvent permitting anionic lactam polymerization at low temperatures was circumvented by using living polymers soluble in aprotic solvents as carriers. Such polymers are able to remain in solution even after the addition of a few monomer units of a lactam, the polymer of which is insoluble. In this way, relative reactivities of a series of four‐membered lactams, as well as that of the five‐membered one were established.