Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Barkev Keoshkerian"'
Autor:
Stephen M. Meckler, Gabriel Iftime, Asritha Nallapaneni, Quentin Van Overmeere, Barkev Keoshkerian, Eli Bulger, Alec S. Ho, Chenhui Zhu, Jessy B. Rivest, Mahati Chintapalli
Publikováno v:
ACS Applied Polymer Materials. 4:1565-1569
Publikováno v:
Macromolecular Reaction Engineering. 4:186-196
In previous work, a modified nitroxide-mediated miniemulsion polymerization was demonstrated in a continuous tubular reactor to prepare a latex of polystyrene homopolymer dispersed in water. There, the initial reaction step (low conversion bulk polym
Autor:
Michael K. Georges, Jordan Pohn, Barkev Keoshkerian, Michael F. Cunningham, Catherine Buragina
Publikováno v:
Macromolecular Theory and Simulations. 17:73-85
A mathematical model is developed from polymer solution thermodynamics and stable free radical polymerization kinetics to predict the monomer swelling behavior of large droplets and small particles that coexist during the seeded polymerization of sty
Publikováno v:
Macromolecular Rapid Communications. 29:479-484
While miniemulsion polymerization has proven to be well-suited for conducting living/ controlled radical polymerizations, emulsion polymerizations have proven to be far more challenging. Ab initio emulsion polymerizations, in which monomer droplets a
Publikováno v:
Macromolecules. 40:7126-7131
TEMPO-mediated styrene miniemulsion polymerizations were conducted at varying particle sizes (∼50, 90, and 180 nm) to study possible effects of compartmentalization. Polymerizations were initiated using a TEMPO-terminated polystyrene macroinitiator
Publikováno v:
Journal of Polymer Science Part A: Polymer Chemistry. 45:69-80
Styrene miniemulsions that were stabilized by common anionic surfactants (sodium dodecyl benzene sulfonate, sodium dodecyl sulfate, and disulfonated alkyl diphenyl oxide sodium salt) polymerized at 25 °C in the presence of L-ascorbic acid without th
Publikováno v:
Macromolecular Rapid Communications. 26:221-225
Summary: Nitroxide-mediated polymerization of styrene in a continuous tubular reactor has been demonstrated for the first time. The polymerization kinetics in the tubular reactor are similar to those in a batch reactor. The number average molecular w
Autor:
Barkev Keoshkerian, Sarah G. Milton, Catherine Buragina, Marcus Lin, Michael F. Cunningham, David C. T. Ng, C.C. Hsu
Publikováno v:
Polymer. 46:1025-1032
Recent efforts to adapt nitroxide-mediated living radical polymerization chemistry to colloidal systems have shown considerable progress when miniemulsions are used. Miniemulsion SFRP in fact can yield higher conversions (>99%) and faster reaction ra
Publikováno v:
Journal of Polymer Science Part A: Polymer Chemistry. 44:232-242
The 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO)-mediated stable free radical polymerization of styrene in miniemulsion at 100 °C is demonstrated. Although this temperature is 20–35 °C lower than typical temperatures used for TEMPO-mediated polym
Autor:
Peter M. Kazmaier, Michael F. Cunningham, Mohmad Asri Abd Ghani, Dalia Abdallah, Erwin Buncel, Barkev Keoshkerian
Publikováno v:
Canadian Journal of Chemistry. 82:1393-1402
The synthesis of azobenzene-functionalized multi-armed unimolecular initiators or "unimers" that can be polymerized using styrene or styrenic derivatives via TEMPO (2,2,6,6-tetramethylpiperidenyl-1-oxyl) mediated stable free radical polymerization (S