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Modeling the Semicontinuous Heterophase Polymerization for Synthesizing Poly( n ‐butyl methacrylate) Nanoparticles
Author(s) -
PérezGarcía María G.,
PérezCarrillo Lourdes A.,
Mendizábal Eduardo,
Puig Jorge E.,
LópezSerrano Francisco
Publication year - 2013
Publication title -
macromolecular reaction engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 32
eISSN - 1862-8338
pISSN - 1862-832X
DOI - 10.1002/mren.201300104
Subject(s) - nucleation , molar mass , polymerization , polymer chemistry , materials science , particle (ecology) , monomer , particle size , reaction rate constant , chemical engineering , thermodynamics , chemistry , polymer , kinetics , composite material , organic chemistry , oceanography , physics , quantum mechanics , engineering , geology
A simple four‐state model containing five‐parameters, in conjunction with experimental conversion, particle number density and average molar masses, is presented to reproduce the semicontinuous heterophase polymerization of butyl methacrylate. The model adequately describes the experimental evolutions of conversion, particle size, average number of particles, average number of radicals per particle, and molar mass. A coagulation mechanism was detected and its rate constant was evaluated. The entry coefficient and the critical radical concentration in the aqueous phase were approximately constant and the exit rate coefficient decreased with monomer feed rate. Homogeneous nucleation is the dominant mechanism of production of particles, micellar nucleation occurs at the slowest feeding rate examined.