Controlled polymerization of functional monomers and synthesis of block copolymers using a β-phosphonylated nitroxide
Identifieur interne : 001966 ( Main/Merge ); précédent : 001965; suivant : 001967Controlled polymerization of functional monomers and synthesis of block copolymers using a β-phosphonylated nitroxide
Auteurs : T. Diaz [France] ; A. Fischer [France] ; A. Jonquikres [France] ; A. Brembilla [France] ; P. Lochon [France]Source :
- Macromolecules [ 0024-9297 ] ; 2003.
Descripteurs français
- Pascal (Inist)
- Régulateur réaction, Nitroxyle, Phosphonate organique, Polymérisation radicalaire, Polymérisation masse, Acrylamide dérivé polymère, Pyridine(4-vinyl)polymère, Polymère vivant, Préparation, Acrylamide dérivé copolymère, Copolymère biséquencé, Pyridine(4-vinyl)copolymère, Etude expérimentale, Acrylamide(N,N-diméthyl) polymère, Acrylamide(N,N-diméthyl) copolymère.
English descriptors
- KwdEn :
Abstract
4-Vinylpyridine (4VP) and N,N-dimethylacrylamide (DMAA) were polymerized in a controlled manner using a β-phosphonylated nitroxide (N-tert-butyl-N-( 1-diethylphosphono-2,2-dimethyl-propyl) nitroxide, commonly designated as DEPN) as a control agent. Compared to the results that had previously been reported for the nitroxide-mediated radical polymerization (NMRP) with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO), the polymerization of 4VP was much faster and very well controlled up to higher monomer conversions. Unlike 4VP, the controlled radical polymerization of DMAA using different types of nitroxides had so far remained limited to a very low conversion range (typically inferior to 10%). The use of DEPN gave rise to a very significant improvement of the NMRP of DMAA by providing a good reaction control up to high conversion (approximately 60%). For the first time, the ability of DEPN to control the homopolymerization of DMAA even at high conversion allowed the synthesis of poly(DMAA-b-4VP) block copolymers with a hydrophilic poly(DMAA) block which was longer than the poly(4VP) block. This particular feature should fairly improve the hydrosolubility of the derived amphiphilic cationic polymers, which can be obtained by simple quaternization of the former block copolymers, and extend the scope of their applications.
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Pascal:03-0251666Le document en format XML
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Acrylamide derivative copolymer</term>
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<term>Diblock copolymer</term>
<term>Experimental study</term>
<term>Free radical polymerization</term>
<term>Living polymer</term>
<term>Nitroxyl</term>
<term>Organic phosphonate</term>
<term>Preparation</term>
<term>Pyridine(4-vinyl) copolymer</term>
<term>Pyridine(4-vinyl) polymer</term>
<term>Reaction regulator</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Régulateur réaction</term>
<term>Nitroxyle</term>
<term>Phosphonate organique</term>
<term>Polymérisation radicalaire</term>
<term>Polymérisation masse</term>
<term>Acrylamide dérivé polymère</term>
<term>Pyridine(4-vinyl)polymère</term>
<term>Polymère vivant</term>
<term>Préparation</term>
<term>Acrylamide dérivé copolymère</term>
<term>Copolymère biséquencé</term>
<term>Pyridine(4-vinyl)copolymère</term>
<term>Etude expérimentale</term>
<term>Acrylamide(N,N-diméthyl) polymère</term>
<term>Acrylamide(N,N-diméthyl) copolymère</term>
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<front><div type="abstract" xml:lang="en">4-Vinylpyridine (4VP) and N,N-dimethylacrylamide (DMAA) were polymerized in a controlled manner using a β-phosphonylated nitroxide (N-tert-butyl-N-( 1-diethylphosphono-2,2-dimethyl-propyl) nitroxide, commonly designated as DEPN) as a control agent. Compared to the results that had previously been reported for the nitroxide-mediated radical polymerization (NMRP) with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO), the polymerization of 4VP was much faster and very well controlled up to higher monomer conversions. Unlike 4VP, the controlled radical polymerization of DMAA using different types of nitroxides had so far remained limited to a very low conversion range (typically inferior to 10%). The use of DEPN gave rise to a very significant improvement of the NMRP of DMAA by providing a good reaction control up to high conversion (approximately 60%). For the first time, the ability of DEPN to control the homopolymerization of DMAA even at high conversion allowed the synthesis of poly(DMAA-b-4VP) block copolymers with a hydrophilic poly(DMAA) block which was longer than the poly(4VP) block. This particular feature should fairly improve the hydrosolubility of the derived amphiphilic cationic polymers, which can be obtained by simple quaternization of the former block copolymers, and extend the scope of their applications.</div>
</front>
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