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Non‐seeded semi‐continuous emulsion polymerization
Author(s) -
Šňupárek Jaromír,
Skoupil Jan,
Podzimek Štêpán,
Kaštánek Alois
Publication year - 1990
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19900310109
Subject(s) - emulsion polymerization , polymerization , particle (ecology) , precipitation polymerization , monomer , chemical engineering , flocculation , emulsion , particle size , polymer chemistry , materials science , seeding , chemistry , polymer , radical polymerization , composite material , thermodynamics , physics , engineering , oceanography , geology
Semi‐continuous emulsion polymerization of acrylic monomers was investigated from the point of view of the particle growth. In the process no seed latex was used and the monomers were fed in an emulsion form. Oscillations of surface tension and particle number indicated a periodical generation and flocculation of particles during the polymerization. Investigation of particle size and molecular weight changes in the first tens of seconds of polymerization has shown that the coagulation process proceeds even in the earliest stage of the polymerization. Initial emulsifier concentration in the reactor strongly affects the particle growth and the final particle number.