Donor–acceptor complexes in copolymerization. XLIX. Cationic polymerization of donor monomers in presence of polar solvents and acrylic monomers. A revised mechanism for polymerization of comonomer complexes

Gaylord, Norman G.; Deshpande, Achyut B.; Dixit, Sunit S.; Maiti, Sukumar; Patnaik, Birendra K.

doi:10.1002/pol.1975.170130219

Cited by 37 publications

(4 citation statements)

References 13 publications

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“…51 Therefore, it was erroneously assumed that the mechanism of such copolymerization was not radical in nature. 52 Our results disagree with this assumption; however, the polydispersity index was found to be higher in the presence of Et 2 AlCl than in its absence. This behavior is possibly a consequence of the complexation of cumyl dithiobenzoate end groups with the Lewis acid.…”

Section: Study Of Raft Copolymerization Of Styrene and Methyl Methacr...contrasting

confidence: 99%

“…During the 1970s, it was shown that alternating copolymerizations conducted in the presence of Lewis acids were relatively insensitive to the presence of transfer agents such as carbon tetrachloride . Therefore, it was erroneously assumed that the mechanism of such copolymerization was not radical in nature . Our results disagree with this assumption; however, the polydispersity index was found to be higher in the presence of Et 2 AlCl than in its absence.…”

Section: Resultscontrasting

confidence: 74%

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Synthesis of Well-Defined Alternating Copolymers by Controlled/Living Radical Polymerization in the Presence of Lewis Acids

2003

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Several controlled/living radical polymerization (CRP) techniques (atom transfer radical polymerization (ATRP), nitroxide-mediated polymerization (NMP), iodide degenerative transfer polymerization (IDTP), and reversible addition-fragmentation transfer polymerization (RAFT)) were studied for the alternating copolymerization of a donor monomer (styrene) and an acceptor monomer (methyl methacrylate or methyl acrylate) complexed with Lewis acid. RAFT polymerization was found to be the most versatile system. The combination of RAFT and Lewis acids complexation techniques allows synthesis of well-defined alternating copolymers poly(styrene-alt-methyl methacrylate) with controlled molecular weight (up to M n ) 70 000 g mol -1 ), low polydispersities (Mw/Mn < 1.3), and controlled comonomer sequences (∼90% of alternating triads). These results were obtained in the presence of diethylaluminum chloride and ethylaluminum sesquichloride. Moreover, the alternating copolymers obtained in such copolymerizations retain chain end functionality and were used as macroinitiators for the synthesis of well-defined diblock copolymers poly(methyl methacrylate-alt-styrene)-b-polystyrene.

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Section: Study Of Raft Copolymerization Of Styrene and Methyl Methacr...contrasting

confidence: 99%

Section: Resultscontrasting

confidence: 74%

Synthesis of Well-Defined Alternating Copolymers by Controlled/Living Radical Polymerization in the Presence of Lewis Acids

2003

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“…Methacrylic monomers can, in fact, be used as solvents or colsolvents in the formation of polymer by a cationic mechanism (95,96).…”

Section: Ionic Polymerization Cationic Polymerization Is Not An Optimentioning

confidence: 99%

Methacrylic Polymers

Slone¹

2003

Kirk-Othmer Encyclopedia of Chemical Technology

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The commercially relevant and diverse chemistry of methacrylic ester polymers has encouraged their use in a remarkable variety of applications. Within this overview, particular attention is paid to the diversity of properties of methacrylic ester polymers and copolymers, the methods used to produce methacrylic ester polymers with specific properties, and the commercial applications of these materials.

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“…The domains of variation or the concentration ranges of the variables were selected from the experimental results of various workers [19,23,24].…”

Section: Design Of the Experimentsmentioning

confidence: 99%

Study of the Parameters Controlling the Alternating Copolymerization of Methyl Methacrylate and Styrene

Bataille

Grossetete

1987

Chemical Engineering Communications

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The copolymerization of methyl methacrylate and styrene, in the presence of zinc chloride, was conducted in the aqueous phase. The zinc chloride acting as a complexing agent.Among the factors affecting the polymerization yield, we have; the level of complexing agents, the monomer ratio and the temperature.The polymers were characterized for their molecular weight (G.P.C.) and analyzed by N.M.R. and D.T.A.A model taking into account the various parameters is proposed.

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Donor–acceptor complexes in copolymerization. XLIX. Cationic polymerization of donor monomers in presence of polar solvents and acrylic monomers. A revised mechanism for polymerization of comonomer complexes

Cited by 37 publications

References 13 publications

Synthesis of Well-Defined Alternating Copolymers by Controlled/Living Radical Polymerization in the Presence of Lewis Acids

Synthesis of Well-Defined Alternating Copolymers by Controlled/Living Radical Polymerization in the Presence of Lewis Acids

Methacrylic Polymers

Study of the Parameters Controlling the Alternating Copolymerization of Methyl Methacrylate and Styrene

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