Synthesis of High Molecular Weight Nylon 6 by Anionic Polymerization of ε-Caprolactam. Formation of Cyclic Oligomers

Autor:	Masahiro Hosoda, Kazue Ueda, Matsuda Tsunetoshi, Kazuo Tai
Rok vydání:	1998
Předmět:	chemistry.chemical_compound Anionic addition polymerization Polymers and Plastics chemistry Bulk polymerization Dimer Polymer chemistry Materials Chemistry Caprolactam Trimer Random hexamer Oligomer Ring-opening polymerization
Zdroj:	Polymer Journal. 30:186-191
ISSN:	1349-0540 0032-3896
DOI:	10.1295/polymj.30.186
Popis:	The formation of cyclic oligomers in the process of the anionic polymerization of e-caprolactam was studied. Cyclic oligomer contents increased with chain initiator concentration and decrease in catalyst concentration. Cyclic dimer content was much higher than that of cyclic trimer to cyclic hexamer and sensitively influenced by the concentrations of catalyst and chain initiator in comparison with cyclic trimer to cyclic hexamer. A mechanism is proposed in which cyclic dimer is peculiarly formed at the acyl-lactam terminal group.
Databáze:	OpenAIRE
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