6533b7dcfe1ef96bd1271f1c
RESEARCH PRODUCT
Controlling the Polymer Microstructure in Anionic Polymerization by Compartmentalization.
Elisabeth RiegerFrederik R. WurmManfred WagnerEduard GruneJan BlankenburgKatharina Landfestersubject
chemistry.chemical_classificationChemistryKineticstechnology industry and agriculture02 engineering and technologyGeneral ChemistryPolymer010402 general chemistry021001 nanoscience & nanotechnology01 natural sciencesCatalysis0104 chemical sciencesDilutionchemistry.chemical_compoundAnionic addition polymerizationMonomerPolymerizationChemical engineeringEmulsionCopolymer0210 nano-technologydescription
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 1 H 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-01-18 | Angewandte Chemie (International ed. in English) |