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Ring‐opening polymerization of nitrogen– and phosphorus‐containing monomers: Polymerization mechanism and polymer properties
Author(s) -
Kobayashi Shiro,
Saegusa Takeo
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.19860030114
Subject(s) - cationic polymerization , polymerization , polymer chemistry , monomer , chemistry , chain growth polymerization , ionic polymerization , copolymer , polymer , ring opening polymerization , substituent , alkyl , organic chemistry , radical polymerization
The first part of this paper describes cationic polymerizations of cyclic imino ethers, 2‐oxazolines and 5,6‐dihydro–4H–1,3–oxazines, which proceed via cyclic onium propagating species or via covalently bonded alkyl halide species. In an extreme case, both ionic and covalent species are present in equilibrium and propagate concurrently. The propagation rate constants due to the respective species were determined. A poly(cyclic imino ether) becomes hydrophilic or lipophilic dependent on the substituent of the monomer. Based on this principle, various types of nonionic polymer surfactants have been prepared, e.g., diblock and triblock copolymers, graft copolymers, and surfactants having one 2‐oxazoline chain. The second part is concerned with ring‐opening polymerizations of new eight cyclic trivalent phosphorus monomers. These polymerizations produced phosphorus‐containing functional polymers such as a chelating resin. 31 P NMR analyses of polymerization of cyclic phosphinite monomers led to propose a new mechanism of “Electrophilic Ring‐Opening Polymerization”.