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Synthesis of new amphiphilic cationic block copolymers and study of their behaviour in aqueous medium as regards hydrophobic microdomain formation

Identifieur interne : 001B24 ( Main/Exploration ); précédent : 001B23; suivant : 001B25

Synthesis of new amphiphilic cationic block copolymers and study of their behaviour in aqueous medium as regards hydrophobic microdomain formation

Auteurs : A. Fischer [France] ; A. Brembilla [France] ; P. Lochon [France]

Source :

Polymer [ 0032-3861 ] ; 2000.

RBID : ISTEX:509C67308D5C2D3B3F134B93C3BC00B673A83169

Descripteurs français

Wicri :
- topic : Polymère.

English descriptors

Abstract

Abstract: Block copolymers of N-hexadecyl-4-vinylpyridinium bromide (4VPC16Br) and N,N-dimethylacrylamide (DMAA) were synthesised by nitroxide-mediated radical polymerisation using 2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO) as a control agent. The behaviour of such block copolymers in aqueous medium was then investigated in relation to the respective size of both the amphiphilic and the hydrophobic block. Viscosimetry, surface tension measurements, and fluorescence spectroscopy revealed that intramolecular hydrophobic microdomains were spontaneously formed by the pendent long alkyl chains. The properties of the corresponding microdomains were determined in terms of polarity and local cohesion, and were revealed to depend on the relative length of the blocks in the copolymer.

Url:

https://api.istex.fr/document/509C67308D5C2D3B3F134B93C3BC00B673A83169/fulltext/pdf

DOI: 10.1016/S0032-3861(00)00493-6

Affiliations:

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Le document en format XML

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<author><name sortKey="Brembilla, A" sort="Brembilla, A" uniqKey="Brembilla A" first="A" last="Brembilla">A. Brembilla</name>
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<term>Amphiphilic species</term>
<term>Aqueous medium</term>
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<term>Nitroxide-mediated radical polymerisation</term>
<term>Petrol technol</term>
<term>Physico-chemical studies</term>
<term>Poly(N-hexadecyl-4-vinyl pyridinium bromide)-b-poly(N,N-dimethylacrylamide)</term>
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<term>Polymer concentration</term>
<term>Polymer concentrations</term>
<term>Polymer solutions</term>
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<term>Previous work</term>
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<term>Surface tension measurements</term>
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<term>Uorescence emission</term>
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<term>Uorescence spectroscopy</term>
<term>Vacuum oven mmhg</term>
<term>Water content</term>
<term>Wavelength value</term>
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<term>Benzoyl peroxide</term>
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<term>Dmaa unit weight percentage</term>
<term>Dmaa units</term>
<term>Elsevier science</term>
<term>Fischer</term>
<term>Fluorescence spectroscopy</term>
<term>Higher proportion</term>
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<term>Hydrophobic parts</term>
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<term>Polymer concentrations</term>
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<term>Preliminary experiments</term>
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<term>Uorescence emission</term>
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<front><div type="abstract" xml:lang="en">Abstract: Block copolymers of N-hexadecyl-4-vinylpyridinium bromide (4VPC16Br) and N,N-dimethylacrylamide (DMAA) were synthesised by nitroxide-mediated radical polymerisation using 2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO) as a control agent. The behaviour of such block copolymers in aqueous medium was then investigated in relation to the respective size of both the amphiphilic and the hydrophobic block. Viscosimetry, surface tension measurements, and fluorescence spectroscopy revealed that intramolecular hydrophobic microdomains were spontaneously formed by the pendent long alkyl chains. The properties of the corresponding microdomains were determined in terms of polarity and local cohesion, and were revealed to depend on the relative length of the blocks in the copolymer.</div>
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Synthesis of new amphiphilic cationic block copolymers and study of their behaviour in aqueous medium as regards hydrophobic microdomain formation

Synthesis of new amphiphilic cationic block copolymers and study of their behaviour in aqueous medium as regards hydrophobic microdomain formation

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri