Copolymerization of Methyl Methacrylate with 4-VinylPyridine Initiated by a Novel Ni(II)a-Benzoinoxime Complex
Identifieur interne : 000594 ( Main/Exploration ); précédent : 000593; suivant : 000595Copolymerization of Methyl Methacrylate with 4-VinylPyridine Initiated by a Novel Ni(II)a-Benzoinoxime Complex
Auteurs : Hafida Harrar-Ferfera [Algérie]Source :
- Journal of applied polymer science [ 0021-8995 ] ; 2008.
Descripteurs français
- Pascal (Inist)
- Méthacrylate de méthyle copolymère, Pyridine(4-vinyl)copolymère, Rapport réactivité, Distribution séquence, Copolymérisation solution, Copolymérisation radicalaire, Nickel II Complexe, Relation composition propriété, Stabilité thermique, Etude expérimentale, Microstructure, Polymérisation transfert atome, Propriété thermique, Copolymérisation transfert atome.
English descriptors
- KwdEn :
- Atom transfer polymerization, Experimental study, Methyl methacrylate copolymer, Microstructure, Nickel II Complexes, Property composition relationship, Pyridine(4-vinyl) copolymer, Radical copolymerization, Reactivity ratio, Sequence distribution, Solution copolymerization, Thermal properties, Thermal stability.
Abstract
Copolymerizations of methyl methacrylate (MMA) with 4-vinylpyridine (4VP) were performed from different monomer feed ratios in 1,4-dioxan at 30°C under free radical initiation experimental conditions, using Ni(II)a-Benzoinoxime complex as initiator. The obtained copolymers (PMMA4VP) were examined by FTIR and 1H NMR spectroscopies. The composition of these copolymers was calculated, using 1H NMR spectra and elemental analysis. Monomer reactivity ratios were estimated from Fineman-Ross (FR, rm = 0.550, rv = 1.165) and Kelen-Tudos (KT, rm = 0.559, rv = 1.286) linearization methods, as well as nonlinear error in variables model (EVM) method using the RREVM computer program (RREVM, rm = 0.559, rv = 1.264). These values suggest that MMA-4VP pair copolymerizes randomly. 1H NMR spectra provide information about the stereochemistry of the copolymers in terms of sequence distributions and configurations. These results showed that the age of the Ni complex has an impact not only on its activity towards polymerization reactions but also on the features of the corresponding copolymers, whereas the chemical composition was insensitive to this prominent factor. The mechanism of MMA-4VP copolymerization is consistent with a radical process as supported by microstructure and molecular weight distribution studies. Thermal behaviours of these copolymers were investigated by differential scanning calorimetry and thermogravimetric analysis.
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream PascalFrancis, to step Corpus: 000204
- to stream PascalFrancis, to step Curation: 000237
- to stream PascalFrancis, to step Checkpoint: 000228
- to stream Main, to step Merge: 000610
- to stream Main, to step Curation: 000594
Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Copolymerization of Methyl Methacrylate with 4-VinylPyridine Initiated by a Novel Ni(II)a-Benzoinoxime Complex</title><author><name sortKey="Harrar Ferfera, Hafida" sort="Harrar Ferfera, Hafida" uniqKey="Harrar Ferfera H" first="Hafida" last="Harrar-Ferfera">Hafida Harrar-Ferfera</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Chimie des Polymères, Faculty of Chemistry, University of Sciences and Technology Houari Boumediene</s1><s3>DZA</s3><sZ>1 aut.</sZ></inist:fA14><country>Algérie</country><wicri:noRegion>Laboratoire de Chimie des Polymères, Faculty of Chemistry, University of Sciences and Technology Houari Boumediene</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">09-0163317</idno><date when="2008">2008</date><idno type="stanalyst">PASCAL 09-0163317 INIST</idno><idno type="RBID">Pascal:09-0163317</idno><idno type="wicri:Area/PascalFrancis/Corpus">000204</idno><idno type="wicri:Area/PascalFrancis/Curation">000237</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000228</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000228</idno><idno type="wicri:doubleKey">0021-8995:2008:Harrar Ferfera H:copolymerization:of:methyl</idno><idno type="wicri:Area/Main/Merge">000610</idno><idno type="wicri:Area/Main/Curation">000594</idno><idno type="wicri:Area/Main/Exploration">000594</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Copolymerization of Methyl Methacrylate with 4-VinylPyridine Initiated by a Novel Ni(II)a-Benzoinoxime Complex</title><author><name sortKey="Harrar Ferfera, Hafida" sort="Harrar Ferfera, Hafida" uniqKey="Harrar Ferfera H" first="Hafida" last="Harrar-Ferfera">Hafida Harrar-Ferfera</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire de Chimie des Polymères, Faculty of Chemistry, University of Sciences and Technology Houari Boumediene</s1><s3>DZA</s3><sZ>1 aut.</sZ></inist:fA14><country>Algérie</country><wicri:noRegion>Laboratoire de Chimie des Polymères, Faculty of Chemistry, University of Sciences and Technology Houari Boumediene</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Journal of applied polymer science</title><title level="j" type="abbreviated">J. appl. polym. sci.</title><idno type="ISSN">0021-8995</idno><imprint><date when="2008">2008</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of applied polymer science</title><title level="j" type="abbreviated">J. appl. polym. sci.</title><idno type="ISSN">0021-8995</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Atom transfer polymerization</term><term>Experimental study</term><term>Methyl methacrylate copolymer</term><term>Microstructure</term><term>Nickel II Complexes</term><term>Property composition relationship</term><term>Pyridine(4-vinyl) copolymer</term><term>Radical copolymerization</term><term>Reactivity ratio</term><term>Sequence distribution</term><term>Solution copolymerization</term><term>Thermal properties</term><term>Thermal stability</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Méthacrylate de méthyle copolymère</term><term>Pyridine(4-vinyl)copolymère</term><term>Rapport réactivité</term><term>Distribution séquence</term><term>Copolymérisation solution</term><term>Copolymérisation radicalaire</term><term>Nickel II Complexe</term><term>Relation composition propriété</term><term>Stabilité thermique</term><term>Etude expérimentale</term><term>Microstructure</term><term>Polymérisation transfert atome</term><term>Propriété thermique</term><term>Copolymérisation transfert atome</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Copolymerizations of methyl methacrylate (MMA) with 4-vinylpyridine (4VP) were performed from different monomer feed ratios in 1,4-dioxan at 30°C under free radical initiation experimental conditions, using Ni(II)a-Benzoinoxime complex as initiator. The obtained copolymers (PMMA4VP) were examined by FTIR and <sup>1</sup>H NMR spectroscopies. The composition of these copolymers was calculated, using <sup>1</sup>H NMR spectra and elemental analysis. Monomer reactivity ratios were estimated from Fineman-Ross (FR, r<sub>m</sub> = 0.550, r<sub>v</sub> = 1.165) and Kelen-Tudos (KT, r<sub>m</sub> = 0.559, r<sub>v</sub> = 1.286) linearization methods, as well as nonlinear error in variables model (EVM) method using the RREVM computer program (RREVM, r<sub>m</sub> = 0.559, r<sub>v</sub> = 1.264). These values suggest that MMA-4VP pair copolymerizes randomly. <sup>1</sup>H NMR spectra provide information about the stereochemistry of the copolymers in terms of sequence distributions and configurations. These results showed that the age of the Ni complex has an impact not only on its activity towards polymerization reactions but also on the features of the corresponding copolymers, whereas the chemical composition was insensitive to this prominent factor. The mechanism of MMA-4VP copolymerization is consistent with a radical process as supported by microstructure and molecular weight distribution studies. Thermal behaviours of these copolymers were investigated by differential scanning calorimetry and thermogravimetric analysis.</div></front></TEI><affiliations><list><country><li>Algérie</li></country></list><tree><country name="Algérie"><noRegion><name sortKey="Harrar Ferfera, Hafida" sort="Harrar Ferfera, Hafida" uniqKey="Harrar Ferfera H" first="Hafida" last="Harrar-Ferfera">Hafida Harrar-Ferfera</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Terre/explor/NickelMaghrebV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000594 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 000594 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Terre
|area= NickelMaghrebV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= Pascal:09-0163317
|texte= Copolymerization of Methyl Methacrylate with 4-VinylPyridine Initiated by a Novel Ni(II)a-Benzoinoxime Complex
}}
| This area was generated with Dilib version V0.6.27. |  |