Addition–fragmentation reactions in polymer chemistry

Yaǧcı, Yusuf; Reetz, Ivo

doi:10.1016/s1381-5148(98)00084-4

Cited by 35 publications

(28 citation statements)

References 34 publications

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“…[12 -14, 17, 18] As a matter of fact, addition fragmentation chain transfer led to the controlled synthesis of (co)polymers, which has been well-summarized in several reviews. [19,20] More recently, reversible addition fragmentation chain transfer (RAFT), introduced by Rizzardo's group, [21 -23] involving thiocarbonylthio compounds as chain transfer agents, has led to the controlled or "pseudo-living" polymerization. Such a concept has also Full Paper: A series of five fluorinated dithioesters PhC(S)SRCH 2 C n F 2n+1 (where R represents an activating spacer and n = 6 or 8) was obtained in fair to high yields (57-88%).…”

Section: Introductionmentioning

confidence: 99%

Use of Originalω-Perfluorinated Dithioesters for the Synthesis of Well-Controlled Polymers by Reversible Addition-Fragmentation Chain Transfer (RAFT)

Lebreton¹,

Améduri²,

Boutevin³

et al. 2002

Macromol. Chem. Phys.

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Section: Introductionmentioning

confidence: 99%

Use of Originalω-Perfluorinated Dithioesters for the Synthesis of Well-Controlled Polymers by Reversible Addition-Fragmentation Chain Transfer (RAFT)

Lebreton¹,

Améduri²,

Boutevin³

et al. 2002

Macromol. Chem. Phys.

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“…The instantaneous number MWD can be modeled by a single exponential for zero-one and pseudo-bulk systems, as follows: (15) where MW is the polymer molecular weight, ρ is the pseudo-first-order entry rate coefficient per polymer particle, and M 0 is the monomer molecular weight. If the transfer event is the dominant chain-stopping event (i.e., k tr rTs p >> ρ, k tr,M rMs p ,ă k t,p ą n{N A V p ), then Equations (14) and (15) (12) and (18).…”

Section: Methodsmentioning

confidence: 99%

“…The equation is as follows: ▼ run 12; the solid curve is the theoretical curve calculated from Equation (18). Table 4.…”

Section: Analysis Of the Rate Of Emulsion Polymerizationmentioning

confidence: 99%

“…In the past two decades, many irreversible AFCT agents have been reported in studies or in patents [12][13][14][15][16][17]. The C tr values of these CTAs for various monomers from the literature have been reviewed by Rizzardo [10], Yamada [11], and Yagci et al [18]. Among these CTAs, some of the allyl CTAs do not have objectionable odors, in contrast to mercaptans.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Allylic Sulfide-Mediated IrreversibleAddition-Fragment Chain Transfer on the EmulsionPolymerization Kinetics of Styrene

et al. 2015

Polymers

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Abstract:The effect of the irreversible addition-fragment chain transfer agent, butyl(2-phenylallyl)sulfane (BPAS), on the course of the emulsion polymerization of styrene and on the product molecular weight was investigated. The emulsion polymerizations were performed using various amounts of sodium dodecyl sulfate (SDS) as the surfactant and potassium peroxodisulfate (KPS) as the initiator. The relationships between the rates of polymerization (R p ) and the number of particles per volume (N c ) with respect to the concentrations of KPS, SDS, and BPAS were found to be R p 9 rKPSs 0.29 , N c 9 rKPSs 0.26 ,R p 9 rSDSs 0.68 , N c 9 rSDSs 0.72 , and R p 9 rBPASs´0 .73 . The obtained relationships can be attributed to the exit of the leaving group radicals on BPAS from the polymer particles. The experimental values of the average number of radicals per particle ( _ n) were strongly dependent on the BPAS concentration and were in good agreement with the theoretical values ( _ n theo ) from model calculations. The number-average molecular weight ( _ M n ) can be controlled by BPAS over nearly the entire conversion range, which is also in agreement with the mathematical model. In addition, the transfer rate coefficient (k tr ) of BPAS can be estimated as 326 L/mol/s at 70˝C. Moreover, similar good results were found for the tested redox reactions at 30˝C.

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“…[3] Among these, recently developed allyl-onium salts, [4][5][6][7][8][9][10][11][12][13] which initiate via addition-fragmentation mechanism, are a promising novelty (see Scheme 2).…”

Section: Introductionmentioning

confidence: 99%

A Novel Bifunctional Addition-Fragmentation Agent for Photoinitiated Cationic Polymerization

Yaǧcı¹,

Yıldırım

Önen

2001

Macromol. Chem. Phys.

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Addition–fragmentation reactions in polymer chemistry

Cited by 35 publications

References 34 publications

Use of Originalω-Perfluorinated Dithioesters for the Synthesis of Well-Controlled Polymers by Reversible Addition-Fragmentation Chain Transfer (RAFT)

Use of Originalω-Perfluorinated Dithioesters for the Synthesis of Well-Controlled Polymers by Reversible Addition-Fragmentation Chain Transfer (RAFT)

The Effect of Allylic Sulfide-Mediated IrreversibleAddition-Fragment Chain Transfer on the EmulsionPolymerization Kinetics of Styrene

A Novel Bifunctional Addition-Fragmentation Agent for Photoinitiated Cationic Polymerization

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