Controlled radical polymerization of vinyl acetate in supercritical CO2 catalyzed by CuBr/terpyridine
- Controlled radical polymerization of vinyl acetate in supercritical CO2 catalyzed by CuBr/terpyridine
- 이슬람모하마드타리쿨; 할도리유바라즈; 웬방호아; 나오샤드이슬람; 나춘섭; 심재진
- FRAGMENTATION CHAIN TRANSFER; CARBON-DIOXIDE; METHYL-METHACRYLATE; DISPERSION POLYMERIZATION; EQUILIBRIUM-CONSTANTS; RATE COEFFICIENTS; FLUID CO2; COMPLEXES; COPPER; ATRP
- Issue Date
- KOREAN INSTITUTE CHEMICAL ENGINEERS
- KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.31, no.6, pp.1088 - 1094
- Poly(vinyl acetate) (PVAc) was synthesized by the atom transfer radical polymerization of vinyl acetate (VAc) in supercritical carbon dioxide using CuBr/2,2':6',2aEuro(3)-terpyridine complex as a catalyst and ethyl 2-bromoisobutyrate as an initiator. Polymerization proceeded in a controlled manner, and low to moderate conversion was achieved within a reasonable time. The effects of the monomer amount, temperature, pressure, initiator, and ligand loading on monomer conversion, molecular weight and molecular weight distribution of the polymer were examined. The reaction kinetics was also investigated. The polymerization reaction was found to be first-order with respect to the monomer concentration. The molecular weights of the resulting PVAc increased linearly with increasing VAc conversion.
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