TY - JOUR
T1 - Controlling the Polymer Microstructure in Anionic Polymerization by Compartmentalization
AU - Rieger, Elisabeth
AU - Blankenburg, Jan
AU - Grune, Eduard
AU - Wagner, Manfred
AU - Landfester, Katharina
AU - Wurm, Frederik R.
PY - 2018/2/23
Y1 - 2018/2/23
N2 - An ideal random anionic copolymerization is forced to produce gradient structures by physical separation of two monomers in emulsion compartments. One monomer (M) is preferably soluble in the droplets, while the other one (D) prefers the continuous phase of a DMSO‐in‐cyclohexane emulsion. The living anionic copolymerization of two activated aziridines is thus confined to the DMSO compartments as polymerization occurs selectively in the droplets. Dilution of the continuous phase adjusts the local concentration of monomer D in the droplets and thus the gradient of the resulting copolymer. The copolymerizations in emulsion are monitored by real‐time 1H NMR kinetics, proving a change of the reactivity ratios of the two monomers upon dilution of the continuous phase from ideal random to adjustable gradients by simple dilution.
AB - An ideal random anionic copolymerization is forced to produce gradient structures by physical separation of two monomers in emulsion compartments. One monomer (M) is preferably soluble in the droplets, while the other one (D) prefers the continuous phase of a DMSO‐in‐cyclohexane emulsion. The living anionic copolymerization of two activated aziridines is thus confined to the DMSO compartments as polymerization occurs selectively in the droplets. Dilution of the continuous phase adjusts the local concentration of monomer D in the droplets and thus the gradient of the resulting copolymer. The copolymerizations in emulsion are monitored by real‐time 1H NMR kinetics, proving a change of the reactivity ratios of the two monomers upon dilution of the continuous phase from ideal random to adjustable gradients by simple dilution.
U2 - 10.1002/anie.201710417
DO - 10.1002/anie.201710417
M3 - Article
VL - 57
SP - 2483
EP - 2487
JO - Angewandte Chemie (international edition)
JF - Angewandte Chemie (international edition)
SN - 1433-7851
IS - 9
ER -