TY - JOUR
T1 - Controlled/living radical polymerization of isoprene and butadiene in emulsion
AU - Bar-Nes, Gabriela
AU - Hall, Radford
AU - Sharma, Vikashni
AU - Gaborieau, Marianne
AU - Lucas, David
AU - Castignolles, Patrice
AU - Gilbert, Robert G.
PY - 2009
Y1 - 2009
N2 - A process for RAFT-controlled radical polymerization in emulsion [36] has been applied to the polymerizations of isoprene and of butadiene in emulsion systems, with the goal of producing latex particles containing block copolymers of acrylic acid (stabilizer and starting polymer), styrene (second polymer) and isoprene or butadiene (third polymer). The microstructure of the polymer chains was examined using dual-detection size-exclusion chromatography, and the nanostructure of the materials was investigated by differential scanning calorimetry and solid-state nuclear magnetic resonance. Reactions were always slow (although faster than the corresponding processes in solution), and exhibited limited reinitiation by isoprene when in emulsion. The materials containing isoprene exhibit a nanostructure with a phase separation into high-Tg polystyrene-rich domains and low-Tg polyisoprene-rich domains, revealed by DSC and NMR. This has the potential to lead to barrier materials with novel physical properties.
AB - A process for RAFT-controlled radical polymerization in emulsion [36] has been applied to the polymerizations of isoprene and of butadiene in emulsion systems, with the goal of producing latex particles containing block copolymers of acrylic acid (stabilizer and starting polymer), styrene (second polymer) and isoprene or butadiene (third polymer). The microstructure of the polymer chains was examined using dual-detection size-exclusion chromatography, and the nanostructure of the materials was investigated by differential scanning calorimetry and solid-state nuclear magnetic resonance. Reactions were always slow (although faster than the corresponding processes in solution), and exhibited limited reinitiation by isoprene when in emulsion. The materials containing isoprene exhibit a nanostructure with a phase separation into high-Tg polystyrene-rich domains and low-Tg polyisoprene-rich domains, revealed by DSC and NMR. This has the potential to lead to barrier materials with novel physical properties.
KW - RAFT
KW - barrier products
KW - butadiene
KW - emulsion polymerization
KW - isoprene
KW - nanophase separation
UR - http://handle.uws.edu.au:8081/1959.7/502519
M3 - Article
SN - 0014-3057
VL - 45
SP - 3149
EP - 3163
JO - European Polymer Journal
JF - European Polymer Journal
IS - 11
ER -