Reversible-Deactivation Radical Polymerization of Methyl Methacrylate and Styrene Mediated by Alkyl Dithiocarbamates and Copper Acetylacetonates
Identifieur interne : 000432 ( France/Analysis ); précédent : 000431; suivant : 000433Reversible-Deactivation Radical Polymerization of Methyl Methacrylate and Styrene Mediated by Alkyl Dithiocarbamates and Copper Acetylacetonates
Auteurs : YAOZHONG ZHANG [États-Unis] ; Kristin Schröder [États-Unis] ; Yungwan Kwak [États-Unis] ; Pawel Krys [États-Unis] ; Aurélie N. Morin [France] ; Tomislav Pintauer [France, États-Unis] ; Rinaldo Poli [France] ; Krzysztof Matyjaszewski [États-Unis]Source :
- Macromolecules : (Print) [ 0024-9297 ] ; 2013.
Descripteurs français
- Pascal (Inist)
- Méthacrylate de méthyle polymère, Styrène polymère, Polymère vivant, Polymérisation radicalaire, Polymérisation masse, Transfert chaîne, Dithiocarbamate organique, Complexe de cuivre, Cinétique chimique, Mécanisme réaction, Modélisation, Méthode fonctionnelle densité, Etude expérimentale, Inifer, Polymérisation radicalaire désactivation réversible.
English descriptors
- KwdEn :
Abstract
Reversible-deactivation radical polymerization (RDRP) of methyl methacrylate (MMA) and styrene (St) was successfully mediated by copper(II) acetylacetonate, [Cu-(acac)2], or copper(II) hexafluoroacetylacetonate, [Cu(hfa)2], in conjunction with 1-cyano-1-methylethyl diethyldithiocarbamate (MAN-DC) or 2-(N,N-diethyldithiocarbamyl)ethyl isobutyrate (EMA-DC) initiators/transfer agents in the absence of additional reducing agents. Linear first-order kinetic plots were obtained for the polymerization of MMA in the presence of [Cu(hfa)2] or [Cu(acac)2] and MAN-DC. [Cu(hfa)2] provided better control than [Cu(acac)2] for the polymerization of MMA, leading to PMMA with narrow molecular weight distribution, Mw/Mn ∼ 1.1. Polymerization of St was successfully carried out with either MAN-DC or EMA-DC in the presence of [Cu(hfa)2], also resulting in polymers with low Mw/Mn values. In the absence of alkyl dithiocarbamates or copper acetylacetonates, the polymerizations resulted in only trace amounts of polymers or polymers with high values of Mw/Mn. Thus, the combination of alkyl dithiocarbamates and copper(II) acetylacetonates provides a convenient way to prepare well-controlled PMMA and PSt. NMR analysis of low-MW polymers reveals the presence of DC groups as chain ends. DFT calculations show that DC group transfer from a H-MMA-DC model of the growing chain to the Cu(II) complexes is energetically accessible and more favorable than Br atom transfer, thus rationalizing the need for the Cu(II)/dithiocarbamate combination for successful control and suggesting that the process takes place by reversible DC group transfer involving a CuII/CuIII couple. Attempts to synthesize complexes [Cu(acac)2(DC)] and [Cu(hfa)2(DC)], in combination with DFT calculations, suggest that these complexes are thermodynamically unstable relative to the bis(diketonate)copper(II) and dithiuram disulfide, but this does not preclude the involvement of the Cu(III) species as a spin trap in RDRP controlled by DC group transfer.
Affiliations:
- France, États-Unis
- Midi-Pyrénées, Occitanie (région administrative), Pennsylvanie, Île-de-France
- Paris, Pittsburgh, Toulouse
- Université Carnegie-Mellon
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Pascal:13-0278832Le document en format XML
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15213</wicri:noRegion><orgName type="university">Université Carnegie-Mellon</orgName><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Schroder, Kristin" sort="Schroder, Kristin" uniqKey="Schroder K" first="Kristin" last="Schröder">Kristin Schröder</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue</s1><s2>Pittsburgh, Pennsylvania 15213</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>8 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Pittsburgh, Pennsylvania 15213</wicri:noRegion><orgName type="university">Université Carnegie-Mellon</orgName><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Kwak, Yungwan" sort="Kwak, Yungwan" uniqKey="Kwak Y" first="Yungwan" last="Kwak">Yungwan Kwak</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Silberline Manufacturing Co., Inc., 36 Progressive Avenue</s1><s2>Tamaqua, Pennsylvania 18252</s2><s3>USA</s3><sZ>3 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Tamaqua, Pennsylvania 18252</wicri:noRegion></affiliation></author><author><name sortKey="Krys, Pawel" sort="Krys, Pawel" uniqKey="Krys P" first="Pawel" last="Krys">Pawel Krys</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue</s1><s2>Pittsburgh, Pennsylvania 15213</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>8 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Pittsburgh, Pennsylvania 15213</wicri:noRegion><orgName type="university">Université Carnegie-Mellon</orgName><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author><author><name sortKey="Morin, Aurelie N" sort="Morin, Aurelie N" uniqKey="Morin A" first="Aurélie N." last="Morin">Aurélie N. Morin</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Laboratoire de Chimie de Coordination (LCC), CNRS 8241, Université de Toulouse, UPS, INPT, 205 Route de Narbonne</s1><s2>31077 Toulouse</s2><s3>FRA</s3><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>31077 Toulouse</wicri:noRegion><placeName><settlement type="city">Toulouse</settlement><region type="region" nuts="2">Occitanie (région administrative)</region><region type="old region" nuts="2">Midi-Pyrénées</region></placeName></affiliation></author><author><name sortKey="Pintauer, Tomislav" sort="Pintauer, Tomislav" uniqKey="Pintauer T" first="Tomislav" last="Pintauer">Tomislav Pintauer</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Laboratoire de Chimie de Coordination (LCC), CNRS 8241, Université de Toulouse, UPS, INPT, 205 Route de Narbonne</s1><s2>31077 Toulouse</s2><s3>FRA</s3><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>31077 Toulouse</wicri:noRegion><placeName><settlement type="city">Toulouse</settlement><region type="region" nuts="2">Occitanie (région administrative)</region><region type="old region" nuts="2">Midi-Pyrénées</region></placeName></affiliation><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Department of Chemistry and Biochemistry, Duquesne University, 600 Forbes Avenue, 308 Mellon Hall</s1><s2>Pittsburgh, Pennsylvania 15282</s2><s3>USA</s3><sZ>6 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Pittsburgh, Pennsylvania 15282</wicri:noRegion></affiliation></author><author><name sortKey="Poli, Rinaldo" sort="Poli, Rinaldo" uniqKey="Poli R" first="Rinaldo" last="Poli">Rinaldo Poli</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Laboratoire de Chimie de Coordination (LCC), CNRS 8241, Université de Toulouse, UPS, INPT, 205 Route de Narbonne</s1><s2>31077 Toulouse</s2><s3>FRA</s3><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>31077 Toulouse</wicri:noRegion><placeName><settlement type="city">Toulouse</settlement><region type="region" nuts="2">Occitanie (région administrative)</region><region type="old region" nuts="2">Midi-Pyrénées</region></placeName></affiliation><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>Institut Universitaire de France, 103, bd Saint-Michel</s1><s2>75005 Paris</s2><s3>FRA</s3><sZ>7 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>75005 Paris</wicri:noRegion><placeName><settlement type="city">Paris</settlement><region type="région" nuts="2">Île-de-France</region></placeName></affiliation></author><author><name sortKey="Matyjaszewski, Krzysztof" sort="Matyjaszewski, Krzysztof" uniqKey="Matyjaszewski K" first="Krzysztof" last="Matyjaszewski">Krzysztof Matyjaszewski</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue</s1><s2>Pittsburgh, Pennsylvania 15213</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>4 aut.</sZ><sZ>8 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Pittsburgh, Pennsylvania 15213</wicri:noRegion><orgName type="university">Université Carnegie-Mellon</orgName><placeName><settlement type="city">Pittsburgh</settlement><region type="state">Pennsylvanie</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Macromolecules : (Print)</title><title level="j" type="abbreviated">Macromolecules : (Print)</title><idno type="ISSN">0024-9297</idno><imprint><date when="2013">2013</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Macromolecules : (Print)</title><title level="j" type="abbreviated">Macromolecules : (Print)</title><idno type="ISSN">0024-9297</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Bulk polymerization</term><term>Chain transfer</term><term>Chemical reaction kinetics</term><term>Copper complex</term><term>Density functional method</term><term>Experimental study</term><term>Free radical polymerization</term><term>Living polymer</term><term>Methyl methacrylate polymer</term><term>Modeling</term><term>Organic dithiocarbamate</term><term>Reaction mechanism</term><term>Styrene polymer</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Méthacrylate de méthyle polymère</term><term>Styrène polymère</term><term>Polymère vivant</term><term>Polymérisation radicalaire</term><term>Polymérisation masse</term><term>Transfert chaîne</term><term>Dithiocarbamate organique</term><term>Complexe de cuivre</term><term>Cinétique chimique</term><term>Mécanisme réaction</term><term>Modélisation</term><term>Méthode fonctionnelle densité</term><term>Etude expérimentale</term><term>Inifer</term><term>Polymérisation radicalaire désactivation réversible</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Reversible-deactivation radical polymerization (RDRP) of methyl methacrylate (MMA) and styrene (St) was successfully mediated by copper(II) acetylacetonate, [Cu-(acac)<sub>2</sub>], or copper(II) hexafluoroacetylacetonate, [Cu(hfa)<sub>2</sub>], in conjunction with 1-cyano-1-methylethyl diethyldithiocarbamate (MAN-DC) or 2-(N,N-diethyldithiocarbamyl)ethyl isobutyrate (EMA-DC) initiators/transfer agents in the absence of additional reducing agents. Linear first-order kinetic plots were obtained for the polymerization of MMA in the presence of [Cu(hfa)<sub>2</sub>] or [Cu(acac)<sub>2</sub>] and MAN-DC. [Cu(hfa)<sub>2</sub>] provided better control than [Cu(acac)<sub>2</sub>] for the polymerization of MMA, leading to PMMA with narrow molecular weight distribution, M<sub>w</sub>/M<sub>n</sub> ∼ 1.1. Polymerization of St was successfully carried out with either MAN-DC or EMA-DC in the presence of [Cu(hfa)<sub>2</sub>], also resulting in polymers with low M<sub>w</sub>/M<sub>n</sub> values. In the absence of alkyl dithiocarbamates or copper acetylacetonates, the polymerizations resulted in only trace amounts of polymers or polymers with high values of M<sub>w</sub>/M<sub>n</sub>. Thus, the combination of alkyl dithiocarbamates and copper(II) acetylacetonates provides a convenient way to prepare well-controlled PMMA and PSt. NMR analysis of low-MW polymers reveals the presence of DC groups as chain ends. DFT calculations show that DC group transfer from a H-MMA-DC model of the growing chain to the Cu(II) complexes is energetically accessible and more favorable than Br atom transfer, thus rationalizing the need for the Cu(II)/dithiocarbamate combination for successful control and suggesting that the process takes place by reversible DC group transfer involving a Cu<sup>II</sup>/Cu<sup>III</sup> couple. Attempts to synthesize complexes [Cu(acac)<sub>2</sub>(DC)] and [Cu(hfa)<sub>2</sub>(DC)], in combination with DFT calculations, suggest that these complexes are thermodynamically unstable relative to the bis(diketonate)copper(II) and dithiuram disulfide, but this does not preclude the involvement of the Cu(III) species as a spin trap in RDRP controlled by DC group transfer.</div></front></TEI><affiliations><list><country><li>France</li><li>États-Unis</li></country><region><li>Midi-Pyrénées</li><li>Occitanie (région administrative)</li><li>Pennsylvanie</li><li>Île-de-France</li></region><settlement><li>Paris</li><li>Pittsburgh</li><li>Toulouse</li></settlement><orgName><li>Université Carnegie-Mellon</li></orgName></list><tree><country name="États-Unis"><region name="Pennsylvanie"><name sortKey="Yaozhong Zhang" sort="Yaozhong Zhang" uniqKey="Yaozhong Zhang" last="Yaozhong Zhang">YAOZHONG ZHANG</name></region><name sortKey="Krys, Pawel" sort="Krys, Pawel" uniqKey="Krys P" first="Pawel" last="Krys">Pawel Krys</name><name sortKey="Kwak, Yungwan" sort="Kwak, Yungwan" uniqKey="Kwak Y" first="Yungwan" last="Kwak">Yungwan Kwak</name><name sortKey="Matyjaszewski, Krzysztof" sort="Matyjaszewski, Krzysztof" uniqKey="Matyjaszewski K" first="Krzysztof" last="Matyjaszewski">Krzysztof Matyjaszewski</name><name sortKey="Pintauer, Tomislav" sort="Pintauer, Tomislav" uniqKey="Pintauer T" first="Tomislav" last="Pintauer">Tomislav Pintauer</name><name sortKey="Schroder, Kristin" sort="Schroder, Kristin" uniqKey="Schroder K" first="Kristin" last="Schröder">Kristin Schröder</name></country><country name="France"><region name="Occitanie (région administrative)"><name sortKey="Morin, Aurelie N" sort="Morin, Aurelie N" uniqKey="Morin A" first="Aurélie N." last="Morin">Aurélie N. Morin</name></region><name sortKey="Pintauer, Tomislav" sort="Pintauer, Tomislav" uniqKey="Pintauer T" first="Tomislav" last="Pintauer">Tomislav Pintauer</name><name sortKey="Poli, Rinaldo" sort="Poli, Rinaldo" uniqKey="Poli R" first="Rinaldo" last="Poli">Rinaldo Poli</name><name sortKey="Poli, Rinaldo" sort="Poli, Rinaldo" uniqKey="Poli R" first="Rinaldo" last="Poli">Rinaldo Poli</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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|texte= Reversible-Deactivation Radical Polymerization of Methyl Methacrylate and Styrene Mediated by Alkyl Dithiocarbamates and Copper Acetylacetonates
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