Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 32, Issue 3, Pages 295-301Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201000531
Keywords
atom transfer radical polymerization (ATRP); high pressure; hybrid particles; polymer brushes
Categories
Funding
- Foundation for Polish Science
- Ministry of Science and Higher Education [N N508 3820 33]
- National Science Foundation [DMR-09-69301, CHE 1026060]
- Air Force Office for Science and Research [FA9550-09-1-0169]
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1026060] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1006473] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [969301] Funding Source: National Science Foundation
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Hybrid nanoparticles with a silica core and grafted poly(methyl methacrylate) (PMMA) or poly(n-butyl methacrylate) (PBMA) chains were prepared via activators generated by electron transfer for atom transfer radical polymerization (AGET ATRP) at room temperature under high pressure. Due to enhanced propagation rate constant and reduced termination rate constant for polymerizations conducted under high pressure, the rate of polymerization was increased, while preserving good control over polymerization when compared to ATRP under ambient pressure. Molecular weights of greater than 1 million were obtained. The PMMA and PBMA brushes exhibited semi-diluted or diluted brush architecture with the highest grafting densities approximate to 0.3 chain.nm(-2).
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