文档介绍：Radical Polymerization of Polyoxyethylene
Macromonomers in Disperse Systems
Ignác Capek
Polymer Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 842 36 Bratislava,
Slovakia
E-mail: ******@
Dedicated to Professor (Polymer Institute, Slovak Academy of Sciences, Dúbravská
cesta 9, 842 36 Bratislava, Slovakia) on the occasion of his retirement and 65th birthday.
Polymerization in disperse systems is a technique which allows one to prepare ultrafine and
microsize latex particles, as well, and random, comb-like, comb-like, star-like, and graft co-
polymers. This article presents a review of the current literature in the field of the sur-
factant-free dispersion or emulsifier-free emulsion polymerization and copolymerization
of the polyoxyethylene unsaturated macromonomers. The key factor for the preparation of
polymer dispersion is the type of emulsifier and its concentration. When conventional sur-
factants are used, the high amount of stabilizer is needed to prepare a fine polymer disper-
sion. Conventional surfactants are held on the particle surface by the physical factors. An
interesting alternative arises with the use of reactive surfactants which contain a polymer-
izable group. The reactive surfactants are incorporated into the polymer matrix or the par-
ticle surface layer which prevents them from subsequent migration. Together with a short
introduction into some ic aspects of radical polymerization of traditional monomers
in dispersion, emulsion, miniemulsion and microemulsion, we focus mainly on an-
ized aggregation of amphiphilic polyoxyethylene macromonomers and radical copolymer-
ization of polyoxyethylene macromonomers with styrene and alkyl (meth)acrylates. We
discuss mechanisms of particle growth, particle nucleation, the growth and termination
polymer chains, and colloidal stability. Effects of initiator, macromonomer, diluent, contin-
uous phase type and concentration of initiator, macromonomer and addit