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Steric stabilization of polystyrene colloids using thiol‐ended polyethylene oxide
Author(s) -
Vidal Frederic,
Guillot J.,
Guyot A.
Publication year - 1995
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1995.220060708
Subject(s) - comonomer , polyethylene glycol , emulsion polymerization , polymer chemistry , polystyrene , materials science , steric effects , styrene , dispersity , colloid , polymerization , polyethylene , thiol , thioglycolic acid , organic chemistry , polymer , chemistry , copolymer , composite material
Thiol‐ended polyethylene oxide (I) has been prepared from the esterification of thioglycolic acid with monomethylether of polyoxyethylene glycol. Emulsion polymerization of styrene (and, in a few cases, methylmethacrylate as comonomer) was carried out in the presence of I using either water‐soluble azo initiator or t‐butylhydroperoxide. In the former case, bimodal particle size distribution was obtained while monodisperse latexes could be prepared in the latter case. Then a redox system was formed from I and t‐BuOOH so that I was both an initiator and a transfer agent. Good steric stabilization of the latexes was observed. The polyethylene oxide sequence of I was partly incorporated at the surface of the latex particles, but the incorporation yield remained limited (between 7 and 18%). Most of the resdue of I remained in the serum.