Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12104/44454
Title: Semicontinuous heterophase polymerization under monomer starved conditions to prepare nanoparticles with narrow size distribution
Author: Ledezma, R.
Trevino, M.E.
Elizalde, L.E.
Perez-Carrillo, L.A.
Mendizábal, E. M.
Puig, J.E.
Lopez, R.G.
Issue Date: 2007
Abstract: The semicontinuous polymerization of methyl methacrylate (MMA) in heterogeneous medium under monomer-starved conditions is reported here. The effect of monomer addition rate on kinetics, particle size, particle number, and PMMA average molar masses are reported. This process permits the synthesis of high-solid content latexes containing nano-sized particles (<40 nm) with narrow particle size distributions [(Dw/Dn) < 1.1], Moreover, the molar masses (Mn ? 0.3-1.2 106 g/mol) are much lower than those expected by chain transfer to monomer, which is the typical termination mechanism in 0-1 emulsion and microemulsion reactions. Both particle size and average molar masses decrease as the rate of monomer addition is diminished. Possible explanations for this process are provided. © 2006 Wiley Periodicals, Inc.
URI: http://www.scopus.com/inward/record.url?eid=2-s2.0-34247372231&partnerID=40&md5=0d7bbe0165222faabd4964ab238b594d
http://hdl.handle.net/20.500.12104/44454
Appears in Collections:Producción científica UdeG

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