Flow-Induced Ordering in Cubic Gels Formed by P2VP-b-PEO-b-P-(GME-co-EGE) Triblock Terpolymer Micelles: A Rheo-SANS Study
Identifieur interne : 003E50 ( PascalFrancis/Curation ); précédent : 003E49; suivant : 003E51Flow-Induced Ordering in Cubic Gels Formed by P2VP-b-PEO-b-P-(GME-co-EGE) Triblock Terpolymer Micelles: A Rheo-SANS Study
Auteurs : Stefan Reinicke [Allemagne] ; Matthias Karg [Australie] ; Alain Lapp [France] ; Lutz Heymann [Allemagne] ; Thomas Hellweg [Allemagne] ; Holger Schmalz [Allemagne]Source :
- Macromolecules : (Print) [ 0024-9297 ] ; 2010.
Descripteurs français
- Pascal (Inist)
- Gel physique, Hydrogel, Pyridine(2-vinyl)copolymère, Copolymère triséquencé, Ethylène oxyde copolymère, Glycidyle éther copolymère, Système micellaire, Ecoulement cisaillé, Transition phase, Structure réticulée, Mode empilement, Diffusion neutron centrale, Etude expérimentale, Transformation ordre ordre, Ether(glycidyl méthyl) copolymère, Ether(glycidyl éthyl) copolymère.
English descriptors
- KwdEn :
Abstract
Small-angle neutron scattering (SANS) measurements under steady shear were performed to determine the exact nature and degree of structural order within a hydrogel based on poly(2-vinylpyridine)-block-poly(ethylene oxide)-block-poly(glycidyl methyl ether-co-ethyl glycidyl ether) (P2VP56-b-PEO410-b-P(GME4R-co-EGE48)) triblock terpolymer micelles. Previous static SANS measurements indicated the presence of a simple cubic (sc) or body centered cubic (bcc) packing. By exposing the sample to steady shear, different macroscopic structural transitions were induced, indicated by a stress plateau and a significant change of the 2D SANS patterns. A comparison of these 2D patterns with patterns from analogous systems reported in literature and theoretical predictions revealed the presence of a bcc structure. Furthermore, with increasing shear rate the structural alignment changes from a nonoriented state to an intermediate state consisting of polycrystalline bcc domains with weak preferential orientation, and finally to a highly aligned state in which twinned bcc domains exist. The [III] axis of the twinned bcc crystals is aligned in the direction of the shear flow, and the {110} slipping planes are preferentially aligned parallel to the shear plane (walls of the Couette cell). A minor fraction of twinned bcc domains, probably located in regions of lower shear velocity, i.e., close to the inner wall of the Couette cell (stator), is tilted by an angle of 90° with respect to the shear plane.
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en" level="a">Flow-Induced Ordering in Cubic Gels Formed by P2VP-b-PEO-b-P-(GME-co-EGE) Triblock Terpolymer Micelles: A Rheo-SANS Study</title><author><name sortKey="Reinicke, Stefan" sort="Reinicke, Stefan" uniqKey="Reinicke S" first="Stefan" last="Reinicke">Stefan Reinicke</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Makromolekulare Chemie II, Universität Bayreuth</s1><s2>95440 Barreuth</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Allemagne</country></affiliation></author><author><name sortKey="Karg, Matthias" sort="Karg, Matthias" uniqKey="Karg M" first="Matthias" last="Karg">Matthias Karg</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Bio21 Institute & School of Chemistry, University of Melbourne</s1><s2>3010 Victoria</s2><s3>AUS</s3><sZ>2 aut.</sZ></inist:fA14><country>Australie</country></affiliation></author><author><name sortKey="Lapp, Alain" sort="Lapp, Alain" uniqKey="Lapp A" first="Alain" last="Lapp">Alain Lapp</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Laboratoire Léon Brillouin, CEA de Saclay</s1><s2>99191 Gif sur Yvette</s2><s3>FRA</s3><sZ>3 aut.</sZ></inist:fA14><country>France</country></affiliation></author><author><name sortKey="Heymann, Lutz" sort="Heymann, Lutz" uniqKey="Heymann L" first="Lutz" last="Heymann">Lutz Heymann</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Technische Mechanik und Strömungsmechanik, Universität Bayreuth</s1><s2>95440 Bayreuth</s2><s3>DEU</s3><sZ>4 aut.</sZ></inist:fA14><country>Allemagne</country></affiliation></author><author><name sortKey="Hellweg, Thomas" sort="Hellweg, Thomas" uniqKey="Hellweg T" first="Thomas" last="Hellweg">Thomas Hellweg</name><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>Physikalische Chemie 1, Universität Bayreuth</s1><s2>95440 Barreuth</s2><s3>DEU</s3><sZ>5 aut.</sZ></inist:fA14><country>Allemagne</country></affiliation><affiliation wicri:level="1"><inist:fA14 i1="06"><s1>Physikalische und Biophysikalische Chemie, Fakultät fur Chemie, Universität Bielefeld</s1><s2>33615 Bielefeld</s2><s3>DEU</s3><sZ>5 aut.</sZ></inist:fA14><country>Allemagne</country></affiliation></author><author><name sortKey="Schmalz, Holger" sort="Schmalz, Holger" uniqKey="Schmalz H" first="Holger" last="Schmalz">Holger Schmalz</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Makromolekulare Chemie II, Universität Bayreuth</s1><s2>95440 Barreuth</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Allemagne</country></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">11-0058245</idno><date when="2010">2010</date><idno type="stanalyst">PASCAL 11-0058245 INIST</idno><idno type="RBID">Pascal:11-0058245</idno><idno type="wicri:Area/PascalFrancis/Corpus">002077</idno><idno type="wicri:Area/PascalFrancis/Curation">003E50</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Flow-Induced Ordering in Cubic Gels Formed by P2VP-b-PEO-b-P-(GME-co-EGE) Triblock Terpolymer Micelles: A Rheo-SANS Study</title><author><name sortKey="Reinicke, Stefan" sort="Reinicke, Stefan" uniqKey="Reinicke S" first="Stefan" last="Reinicke">Stefan Reinicke</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Makromolekulare Chemie II, Universität Bayreuth</s1><s2>95440 Barreuth</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Allemagne</country></affiliation></author><author><name sortKey="Karg, Matthias" sort="Karg, Matthias" uniqKey="Karg M" first="Matthias" last="Karg">Matthias Karg</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Bio21 Institute & School of Chemistry, University of Melbourne</s1><s2>3010 Victoria</s2><s3>AUS</s3><sZ>2 aut.</sZ></inist:fA14><country>Australie</country></affiliation></author><author><name sortKey="Lapp, Alain" sort="Lapp, Alain" uniqKey="Lapp A" first="Alain" last="Lapp">Alain Lapp</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Laboratoire Léon Brillouin, CEA de Saclay</s1><s2>99191 Gif sur Yvette</s2><s3>FRA</s3><sZ>3 aut.</sZ></inist:fA14><country>France</country></affiliation></author><author><name sortKey="Heymann, Lutz" sort="Heymann, Lutz" uniqKey="Heymann L" first="Lutz" last="Heymann">Lutz Heymann</name><affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Technische Mechanik und Strömungsmechanik, Universität Bayreuth</s1><s2>95440 Bayreuth</s2><s3>DEU</s3><sZ>4 aut.</sZ></inist:fA14><country>Allemagne</country></affiliation></author><author><name sortKey="Hellweg, Thomas" sort="Hellweg, Thomas" uniqKey="Hellweg T" first="Thomas" last="Hellweg">Thomas Hellweg</name><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>Physikalische Chemie 1, Universität Bayreuth</s1><s2>95440 Barreuth</s2><s3>DEU</s3><sZ>5 aut.</sZ></inist:fA14><country>Allemagne</country></affiliation><affiliation wicri:level="1"><inist:fA14 i1="06"><s1>Physikalische und Biophysikalische Chemie, Fakultät fur Chemie, Universität Bielefeld</s1><s2>33615 Bielefeld</s2><s3>DEU</s3><sZ>5 aut.</sZ></inist:fA14><country>Allemagne</country></affiliation></author><author><name sortKey="Schmalz, Holger" sort="Schmalz, Holger" uniqKey="Schmalz H" first="Holger" last="Schmalz">Holger Schmalz</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Makromolekulare Chemie II, Universität Bayreuth</s1><s2>95440 Barreuth</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Allemagne</country></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="2010">2010</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>Ethylene oxide copolymer</term><term>Experimental study</term><term>Glycidyl ether copolymer</term><term>Hydrogel</term><term>Lattice structure</term><term>Micellar systems</term><term>Phase transitions</term><term>Physical gel</term><term>Pyridine(2-vinyl) copolymer</term><term>Shear flow</term><term>Small angle neutron scattering</term><term>Stacking sequence</term><term>Triblock copolymer</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Gel physique</term><term>Hydrogel</term><term>Pyridine(2-vinyl)copolymère</term><term>Copolymère triséquencé</term><term>Ethylène oxyde copolymère</term><term>Glycidyle éther copolymère</term><term>Système micellaire</term><term>Ecoulement cisaillé</term><term>Transition phase</term><term>Structure réticulée</term><term>Mode empilement</term><term>Diffusion neutron centrale</term><term>Etude expérimentale</term><term>Transformation ordre ordre</term><term>Ether(glycidyl méthyl) copolymère</term><term>Ether(glycidyl éthyl) copolymère</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Small-angle neutron scattering (SANS) measurements under steady shear were performed to determine the exact nature and degree of structural order within a hydrogel based on poly(2-vinylpyridine)-block-poly(ethylene oxide)-block-poly(glycidyl methyl ether-co-ethyl glycidyl ether) (P2VP<sub>56</sub>-b-PEO<sub>410</sub>-b-P(GME<sub>4R</sub>-co-EGE<sub>48</sub>)) triblock terpolymer micelles. Previous static SANS measurements indicated the presence of a simple cubic (sc) or body centered cubic (bcc) packing. By exposing the sample to steady shear, different macroscopic structural transitions were induced, indicated by a stress plateau and a significant change of the 2D SANS patterns. A comparison of these 2D patterns with patterns from analogous systems reported in literature and theoretical predictions revealed the presence of a bcc structure. Furthermore, with increasing shear rate the structural alignment changes from a nonoriented state to an intermediate state consisting of polycrystalline bcc domains with weak preferential orientation, and finally to a highly aligned state in which twinned bcc domains exist. The [III] axis of the twinned bcc crystals is aligned in the direction of the shear flow, and the {110} slipping planes are preferentially aligned parallel to the shear plane (walls of the Couette cell). A minor fraction of twinned bcc domains, probably located in regions of lower shear velocity, i.e., close to the inner wall of the Couette cell (stator), is tilted by an angle of 90° with respect to the shear plane.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0024-9297</s0></fA01><fA02 i1="01"><s0>MAMOBX</s0></fA02><fA03 i2="1"><s0>Macromolecules : (Print)</s0></fA03><fA05><s2>43</s2></fA05><fA06><s2>23</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Flow-Induced Ordering in Cubic Gels Formed by P2VP-b-PEO-b-P-(GME-co-EGE) Triblock Terpolymer Micelles: A Rheo-SANS Study</s1></fA08><fA11 i1="01" i2="1"><s1>REINICKE (Stefan)</s1></fA11><fA11 i1="02" i2="1"><s1>KARG (Matthias)</s1></fA11><fA11 i1="03" i2="1"><s1>LAPP (Alain)</s1></fA11><fA11 i1="04" i2="1"><s1>HEYMANN (Lutz)</s1></fA11><fA11 i1="05" i2="1"><s1>HELLWEG (Thomas)</s1></fA11><fA11 i1="06" i2="1"><s1>SCHMALZ (Holger)</s1></fA11><fA14 i1="01"><s1>Makromolekulare Chemie II, Universität Bayreuth</s1><s2>95440 Barreuth</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>6 aut.</sZ></fA14><fA14 i1="02"><s1>Bio21 Institute & School of Chemistry, University of Melbourne</s1><s2>3010 Victoria</s2><s3>AUS</s3><sZ>2 aut.</sZ></fA14><fA14 i1="03"><s1>Laboratoire Léon Brillouin, CEA de Saclay</s1><s2>99191 Gif sur Yvette</s2><s3>FRA</s3><sZ>3 aut.</sZ></fA14><fA14 i1="04"><s1>Technische Mechanik und Strömungsmechanik, Universität Bayreuth</s1><s2>95440 Bayreuth</s2><s3>DEU</s3><sZ>4 aut.</sZ></fA14><fA14 i1="05"><s1>Physikalische Chemie 1, Universität Bayreuth</s1><s2>95440 Barreuth</s2><s3>DEU</s3><sZ>5 aut.</sZ></fA14><fA14 i1="06"><s1>Physikalische und Biophysikalische Chemie, Fakultät fur Chemie, Universität Bielefeld</s1><s2>33615 Bielefeld</s2><s3>DEU</s3><sZ>5 aut.</sZ></fA14><fA20><s1>10045-10054</s1></fA20><fA21><s1>2010</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>13789</s2><s5>354000194036000570</s5></fA43><fA44><s0>0000</s0><s1>© 2011 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>55 ref.</s0></fA45><fA47 i1="01" i2="1"><s0>11-0058245</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Macromolecules : (Print)</s0></fA64><fA66 i1="01"><s0>USA</s0></fA66><fC01 i1="01" l="ENG"><s0>Small-angle neutron scattering (SANS) measurements under steady shear were performed to determine the exact nature and degree of structural order within a hydrogel based on poly(2-vinylpyridine)-block-poly(ethylene oxide)-block-poly(glycidyl methyl ether-co-ethyl glycidyl ether) (P2VP<sub>56</sub>-b-PEO<sub>410</sub>-b-P(GME<sub>4R</sub>-co-EGE<sub>48</sub>)) triblock terpolymer micelles. Previous static SANS measurements indicated the presence of a simple cubic (sc) or body centered cubic (bcc) packing. By exposing the sample to steady shear, different macroscopic structural transitions were induced, indicated by a stress plateau and a significant change of the 2D SANS patterns. A comparison of these 2D patterns with patterns from analogous systems reported in literature and theoretical predictions revealed the presence of a bcc structure. Furthermore, with increasing shear rate the structural alignment changes from a nonoriented state to an intermediate state consisting of polycrystalline bcc domains with weak preferential orientation, and finally to a highly aligned state in which twinned bcc domains exist. The [III] axis of the twinned bcc crystals is aligned in the direction of the shear flow, and the {110} slipping planes are preferentially aligned parallel to the shear plane (walls of the Couette cell). 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