901
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Lai JT, Shea R. Controlled radical polymerization by carboxyl- and hydroxyl-terminated dithiocarbamates and xanthates. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/pola.21532] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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902
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Mechanism and kinetics of dithiobenzoate-mediated RAFT polymerization. I. The current situation. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/pola.21589] [Citation(s) in RCA: 381] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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903
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Kaneyoshi H, Matyjaszewski K. Synthesis of poly(vinyl acetate)-graft-polystyrene by a combination of cobalt-mediated radical polymerization and atom transfer radical polymerization. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/pola.21840] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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904
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Wang R, Luo Y, Li BG, Zhu S. Control of gradient copolymer composition in ATRP using semibatch feeding policy. AIChE J 2006. [DOI: 10.1002/aic.11063] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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905
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Roy D. Controlled Modification of Cellulosic Surfaces via the Reversible Addition - Fragmentation Chain Transfer (RAFT) Graft Polymerization Process. Aust J Chem 2006. [DOI: 10.1071/ch06012] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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906
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Germack DS, Harrisson S, Brown GO, Wooley KL. Influence of the structure of nanoscopic building blocks on the assembly of micropatterned surfaces. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/pola.21614] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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907
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Nguyen DH, Vana P. Silica-immobilized cumyl dithiobenzoate as mediating agent in reversible addition fragmentation chain transfer (RAFT) polymerization. POLYM ADVAN TECHNOL 2006. [DOI: 10.1002/pat.826] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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908
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Gibbons O, Carroll WM, Aldabbagh F, Yamada B. Nitroxide-mediated controlled statistical copolymerizations ofN-isopropylacrylamide withN-tert-butylacrylamide. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/pola.21751] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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909
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Zhang L, Katapodi K, Davis TP, Barner-Kowollik C, Stenzel MH. Using the reversible addition–fragmentation chain transfer process to synthesize core-crosslinked micelles. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/pola.21328] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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910
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Liaw DJ, Huang CC, Kang ET. Effects of the architecture and environment on polymeric molecular assemblies of novel amphiphilic diblock copolynorbornenes with narrow polydispersity via living ring-opening metathesis polymerization. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/pola.21397] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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911
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Kamigaito M, Satoh K. Stereospecific living radical polymerization for simultaneous control of molecular weight and tacticity. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/pola.21688] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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912
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Nguyen DH, Vana P. On the Mechanism of Radical Polymerization of Methyl Methacrylate with Dithiobenzoic Acid as Mediator. Aust J Chem 2006. [DOI: 10.1071/ch06158] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Dithiobenzoic acid (DTBA) induces controlled polymerization behaviour in methyl methacrylate polymerization at 60°C, accompanied by a pronounced induction period of several hours. DTBA is partially transformed during this induction period into a dithioester with a tertiary ester group moiety, which constitutes an efficient reversible addition–fragmentation chain transfer (RAFT) agent. The transformation reaction is proposed to proceed via a hydrogen abstraction from DTBA by radicals and subsequent termination of the formed phenylcarbonothioylsulfanyl radical with propagating radicals. The proposed reaction scheme was implemented into a computer model, by which the rate coefficient of the hydrogen abstraction from DTBA and of the reinitiation of the intermediate phenylcarbonothioylsulfanyl radical was estimated. The model is in agreement with all of the species observable by electrospray ionization mass spectrometry, with the extent of the experimental induction periods, and with the absolute concentrations of dithioesters that act as efficient RAFT agents during the polymerization. A protocol that uses a cocktail of initiators is introduced, by which the induction period in DTBA-mediated polymerization is effectively eliminated.
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913
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Malic N, Evans RA. Synthesis of Carboxylic Acid and Ester Mid-Functionalized Polymers using RAFT Polymerization and ATRP. Aust J Chem 2006. [DOI: 10.1071/ch06317] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Polymers with a single central point of carboxylic acid functionality were prepared by living radical polymerization methods, RAFT and ATRP. A convenient water-based synthesis of a Y-branched ATRP initiator from 3,5-dihydroxybenzoic acid and 2-bromopropionyl bromide, from which the Y-branched RAFT agent is then subsequently derived, is described. Polymerization occurred uniformly from both of the RAFT groups to give chains of equal length as shown by hydrolysis. ATRP polymerization based on an ester derivative of 3,5-bis(2-bromopropionyloxy)benzoic acid as initiator was well controlled, whereas the free carboxylic acid gave inconsistent performance. The ability to couple functional molecules to the middle of polymers would provide better protection or interaction of the functional molecule with the polymer than conventional end attachment. This would find applications such as in drug delivery where more efficient protection would allow the use of lower molecular weight polymers.
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914
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Zhou D, Zhu X, Zhu J, Hu L, Cheng Z. Influence of the chemical structure of dithiocarbamates with different R groups on the reversible addition-fragmentation chain transfer polymerization. J Appl Polym Sci 2006. [DOI: 10.1002/app.25280] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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915
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Barner L, Perera S, Sandanayake S, Davis TP. Reversible addition-fragmentation chain transfer graft copolymerization of styrene andm-isopropenyl-α,α′-dimethylbenzyl isocyanate from polypropylene lanterns: Solid phases for scavenging applications. ACTA ACUST UNITED AC 2005. [DOI: 10.1002/pola.21216] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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916
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Debuigne A, Caille JR, Jérôme R. Quinone transfer radical polymerization of styrene: Synthesis of the actual initiator. ACTA ACUST UNITED AC 2005. [DOI: 10.1002/pola.21234] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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