US EPA

6646150 

Journal Article 

Particle size control in emulsion copolymerization of styrene with poly(ethylene oxide) macromonomers 

Kawaguchi, S; Tano, K; Maniruzzaman, M; Ito, K; , 

2000 

1 

Macromolecular Symposia
ISSN: 1022-1360
EISSN: 1521-3900 

WILEY-V C H VERLAG GMBH 

BERLIN 

Macromolecular Symposia 

150 

101-108 

English 

10.1002/1521-3900(200002)150:1<101::AID-MASY101>3.0.CO;2-4 

WOS:000086785300015 

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0033651950&doi=10.1002%2f1521-3900%28200002%29150%3a1%3c101%3a%3aAID-MASY101%3e3.0.CO%3b2-4&partnerID=40&md5=40f2ba55998bcfdaa2028e1ffcf97b26
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This paper presents a successful application of hydrophobically enhanced poly(ethylene oxide) (PEO) macromonomers (1) to emulsion copolymerization of styrene using potassium persulfate (KPS) or 2, 2'-azobisisobutyronitrile(AIBN) as an initiator at 65 degrees C. This copolymerization yields in a batch process monodisperse, or nearly monodisperse, latex particles with 70400nm in diameters. Factors which affect the particle size and distribution include the structure and molecular weight of the macromonomers, initiator species, initiator and macromonomer concentrations. The power law exponents under the several conditions were determined and rationalized. The number of latex particles appears to be controlled by the fates of the graft copolymers formed in monomer-swollen macromonomer micelles and in continuous phase.