Calorimetric study on the influence of the nature of the RAFT agent and the initiator in ab initio aqueous heterophase polymerization

Nozari, Samira; Tauer, Klaus

doi:10.1016/j.polymer.2004.11.039

Cited by 26 publications

(19 citation statements)

References 29 publications

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“…The average DH pm value obtained from four calorimeter runs is 61.66 ± 2.35 kJ/mol. This value is in the range as observed for ethylenic monomers [42,43] and slightly lower than the value determined with this calorimeter for styrene [44].…”

Section: Heterophase Polymerizationcontrasting

confidence: 64%

Poly(α-methylene-γ-valerolactone) 1. Sustainable monomer synthesis and radical polymerization studies

Vobecka

Wei

Tauer

et al. 2015

Polymer

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Section: Heterophase Polymerizationcontrasting

confidence: 64%

Poly(α-methylene-γ-valerolactone) 1. Sustainable monomer synthesis and radical polymerization studies

Vobecka

Wei

Tauer

et al. 2015

Polymer

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“…Me-MMA [41,67,68] a,b) [9] Sty [9,13,68,69]b) [70,71] BA [9,72] Et-MA [73] PhCH 2 -MMA [41,74] b) [75] NMAS [76] Dendron-MA [77] DBI [78] DCHI [78] Sty [74,[79][80][81][82][83] a) [84,85] b) [75,[86][87][88][89][90][91][92][93] c) [94] StyCH 2 Cl [84,95] MA [73,83,[96][97][98][99] BA [99][100][101] b) [89,90] DA [102] Am …”

Section: Vinyl Esters and Othersmentioning

confidence: 99%

“…d) R 0 can be poly(ethylene glycol) (PEG), [212,276] cellulose, [222] a polyester dendrimer, [221] a polypeptide, [260] or a silica nanoparticle. [217] [9,117,119,324,361] HEMA a) [348] NMAS [76] Sty [9,48,49,67,69,82,84, 107,110,119,133,186, 193,195,197,198,206, 213,216,298,311,324, 336,337,349-352, 361-365, 374,378, 382] a) [225 -227,348] b) [70,71,389] c) [300] MeSty a) [226] StyOCOMe [240] StyMe a) [226] StyOMe a) [226] StyCl a) [226] StyCH 2 Cl [216] StyCH 2 N(Me) 3 Cl [238] 4VP [364] AA [248,323, 366 -370] MA [67,73,119,192,324,336,337,[361][362][363]374,375,383] a) [256,335,379] c) [300] BA <...>…”

Section: Influence Of Chain Lengthmentioning

confidence: 99%

Experimental Requirements for an Efficient Control of Free‐Radical Polymerizations via the Reversible Addition‐Fragmentation Chain Transfer (RAFT) Process

Favier

Charreyre

2006

Macromol. Rapid Commun.

435

347

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Summary: Reversible addition‐fragmentation chain transfer (RAFT) polymerization is a recent and very versatile controlled radical polymerization technique that has enabled the synthesis of a wide range of macromolecules with well‐defined structures, compositions, and functionalities. The RAFT process is based on a reversible addition‐fragmentation reaction mediated by thiocarbonylthio compounds used as chain transfer agents (CTAs). A great variety of CTAs have been designed and synthesized so far with different kinds of substituents. In this review, all of the CTAs encountered in the literature from 1998 to date are reported and classified according to several criteria : i) the structure of their substituents, ii) the various monomers that they have been polymerized with, and iii) the type of polymerization that has been performed (solution, dispersed media, surface initiated, and copolymerization). Moreover, the influence of various parameters is discussed, especially the CTA structure relative to the monomer and the experimental conditions (temperature, pressure, initiation, CTA/initiator ratio, concentration), in order to optimise the kinetics and the efficiency of the molecular‐weight‐distribution control.

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“…[32][33][34] In this study, we selected a dithiocarbamate-type RAFT agent having a pyrrole unit because of its moderate insolubility in water and compatibility with a wide range of monomers. [32][33][34] In this study, we selected a dithiocarbamate-type RAFT agent having a pyrrole unit because of its moderate insolubility in water and compatibility with a wide range of monomers.…”

Section: Raft-mediated Emulsion Polymerization Of Cp Using Various Sumentioning

confidence: 99%

“…To achieve a controlled polymerization in a RAFT-mediated emulsion system, the solubility of the RAFT agent and the transport of the RAFT agent to the polymer particles are of significant importance. [32][33][34] In this study, we selected a dithiocarbamate-type RAFT agent having a pyrrole unit because of its moderate insolubility in water and compatibility with a wide range of monomers. The solubility of the dithiocarbamate-type RAFT agent in water was limited, whereas it was soluble in the CP monomer.…”

Section: Raft-mediated Emulsion Polymerization Of Cp Using Various Sumentioning

confidence: 99%

RAFT‐mediated emulsion polymerization of chloroprene and impact of chain‐end structure on chloroprene rubbers

Ishigaki

Mori

2017

J of Applied Polymer Sci

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The reversible addition-fragmentation chain transfer (RAFT) polymerization of chloroprene (CP) in an emulsion system using a dithiocarbamate-type RAFT agent was studied. The controlled RAFT-mediated emulsion polymerization was achieved by the appropriate combination of a RAFT agent and nonionic surfactant (polyoxyethylene phenyl ether) using a water-soluble initiator (VA-044) at 35 8C. An almost linear first-order kinetic plot was observed until relatively high conversion (>80%) with molecular weights between 22,300 and 33,100 and relatively narrow molecular weight distributions (M w /M n Ϲ 1.5) were achieved. The amount of the emulsifier used and the pH of the system were found to affect the controlled character, polymerization rate, and induction period, which are related to the size of the emulsion particles. Large-scale RAFT-mediated emulsion polymerization was also employed to afford industrially applicable poly(CP) (M w > 25 3 10 4 , resulting product > 2300 g). The vulcanized CP rubber obtained from the RAFT-synthesized poly(CP) exhibited better physical properties, particularly tensile modulus and compression set, which may be due to the presence of the reactive end groups and the absence of low-molecular-weight products. We also evaluated the impact of the chain-end structure on the mechanical and physical properties of these industrially important CP rubbers with carbon black.

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Calorimetric study on the influence of the nature of the RAFT agent and the initiator in ab initio aqueous heterophase polymerization

Cited by 26 publications

References 29 publications

Poly(α-methylene-γ-valerolactone) 1. Sustainable monomer synthesis and radical polymerization studies

Poly(α-methylene-γ-valerolactone) 1. Sustainable monomer synthesis and radical polymerization studies

Experimental Requirements for an Efficient Control of Free‐Radical Polymerizations via the Reversible Addition‐Fragmentation Chain Transfer (RAFT) Process

RAFT‐mediated emulsion polymerization of chloroprene and impact of chain‐end structure on chloroprene rubbers

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