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Experimental discrimination between competing nucleation theories in microemulsion polymerizations
Author(s) -
Kim Dong Ryul,
Napper Donald H.
Publication year - 1996
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.1996.030171201
Subject(s) - nucleation , microemulsion , methyl methacrylate , styrene , materials science , monomer , polymer chemistry , pyrene , polymerization , chemical engineering , particle (ecology) , methacrylate , copolymer , chemistry , polymer , organic chemistry , composite material , pulmonary surfactant , oceanography , engineering , geology
The particle nucleation processes involved in the microemulsion polymerizations of styrene and methyl methacrylate have been investigated using pyrene fluorescence intensity measurements as a function of conversion. Very distinctive differences were observed between the results for the two different monomers. The styrene fluorescence results were consistent with nucleation occurring within the microemulsion droplets, followed by the subsequent heterocoagulation of the nucleated particles with remaining droplets. The very different methyl methacrylate data were consistent with a homogeneous nucleation mechanism.