Premium
Cyclic oligomers content in anionic poly (ϵ‐caprolactam)
Author(s) -
Biagini Emilio,
Costa Giovanna,
Russo Saverio,
Turturro Antonio,
Riva Fernando,
Rovida Camillo
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.19860060119
Subject(s) - caprolactam , polymerization , crystallinity , polymer , polymer chemistry , materials science , chemical engineering , degree of polymerization , mass fraction , chemistry , composite material , engineering
The influence of initiator and activator concentrations on the anionic polymerization of ϵ‐caprolactam and, in particular, on the methanol – extractable fraction of the final polymer has been widely studied. Due to the increasing interest of this polymerization in the field of reaction injection molding (RIM) technology, a thorough investigation has been also carried out to find the best experimental conditions for this reaction in the mold. The effect of postpolymerization annealing on the overall amount of low‐molecular mass substances, among which cyclic oligomers, has been evaluated. Thermal properties as well as crystallinity of the resultant materials have been examined. A comparison with literature data is given; the suggested correlation between the amount of the oligomeric fraction and the molecular arrangement of the polymer in the solid state is discussed.