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Development of morphology in latex particles: The interplay between thermodynamic and kinetic parameters
Author(s) -
Chen YiCherng,
Dimonie Victoria L.,
Shaffer Olga L.,
ElAasser Mohamed S.
Publication year - 1993
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4990300208
Subject(s) - emulsion polymerization , materials science , polystyrene , polymer , methyl methacrylate , monomer , composite number , polymer chemistry , polymerization , particle (ecology) , emulsion , chemical engineering , viscosity , composite material , engineering , oceanography , geology
A thermodynamic analysis and a mathematical model were developed to describe the free energy changes corresponding to various possible morphologies in composite latex particles. Two experimental composite latex systems were used to verify and establish limitations of the model. The two latex systems were based on polystyrene/poly(methyl methacrylate), one prepared by conventional seeded emulsion polymerization and the second system by direct emulsification of a solution of a blend of the two polymers. The influence of several experimental parameters on latex particle morphology was investigated. These included monomer/polymer ratio, surfactant type, and initiator type in the seeded emulsion polymerization system. The influence of local viscosity, shear effects, and molecular weights of polymers were investigated in the artificial latex system.