Anionic Ring-opening Polymerization: Lactams
1989; Elsevier BV; Linguagem: Inglês
10.1016/b978-0-08-096701-1.00097-5
Autores Tópico(s)Organometallic Complex Synthesis and Catalysis
ResumoThe anionic polymerization of lactams differs from the anionic polymerizations of most unsaturated and heterocyclic monomers, because the growth center at the chain end is not represented by an anionically activated group but by a neutral N-acylated lactam; the anionically activated species is the incoming monomer (Scheme 1). For the sake of simplicity, the anionically activated lactam is written as an N anion without counterion, although it may be present in various ionized states, such as a contact or solvent-separated ion pair, as well as complexed, solvated or free anion. Depending on the reaction medium and monomer structure, the negative charge is distributed between the three atoms of the amide group.
Referência(s)