Synthesis and characterization of new ion conductors based on butadiene styrene copolymers

Mokrini, Asmae; Río, Carmen del; Acosta, J. L.

doi:10.1016/j.ssi.2003.11.022

Cited by 37 publications

(38 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several reports on the morphology and physical properties of proton conducting membranes based on the polystyrene-containing block copolymers have been published. These include partially sulfonated poly(styrene-b-[ethylene-co-butylene]-b-styrene) (S-SEBS), [8][9][10][11][12][13][14][15][16] sulfonated poly(styrene-b-isobutylene-b-styrene) (S-SIBS), [17][18][19][20][21] sulfonated hydrogenated poly(butadiene-b-styrene) (S-HPBS), 22,23 sulfonated poly-(styrene-b-ethylene-alt-propylene) (S-SEP), 24,25 and poly-(styrene-b-ethylene/propylene-b-styrene) (S-SEPS) copolymer. 24 In related block copolymer studies, graft copolymers of PS-g-macPSSA show enhanced conductivity compared to that of random copolymers of styrene and styrenesulfonic acid (PS-r-PSSA).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Proton Conductivity of Partially Sulfonated Poly([vinylidene difluoride-co-hexafluoropropylene]-b-styrene) Block Copolymers

2005

View full text Add to dashboard Cite

Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/eng/view/object/?id=aeb1ea6c-9c47-4565-9a16-283705ab0182 http://nparc.cisti-icist.nrc-cnrc.gc.ca/fra/voir/objet/?id=aeb1ea6c-9c47-4565-9a16-283705ab0182 Synthesis and Proton Conductivity of Partially Sulfonated Poly([vinylidene difluoride-co-hexafluoropropylene]-b-styrene) Block CopolymersZhiqing Shi and Steven Holdcroft* Department of Chemistry, Simon Fraser University, Burnaby, BC V5A 1S6, Canada, and Institute for Fuel Cell Innovation, National Research Council (NRC), 3250 East Mall, Vancouver, BC V6T 1W5, Canada Received November 2, 2004; Revised Manuscript Received February 18, 2005 ABSTRACT: A series of novel, amphiphilic block copolymers comprising of sulfonated poly([vinylidene difluoride-co-hexafluoropropylene]-b-styrene) [P(VDF-co-HFP)-b-SPS] were synthesized. The numberaverage molecular weights of the fluorous and polystyrene segments were 17 900 and 8100 g/mol, respectively. Sulfonation of the polystyrene segment to different extents provided a series of polymers which were cast into films to yield proton exchange membranes with varying ion exchange capacity (IEC). Proton conductivity of the membranes increased significantly when the IEC was increased from 0.5 to 1.2 mmol/g. For 0.9-1.2 mmol/g IEC membranes, the conductivity was similar to Nafion 117, significantly higher than random copolymers of polystyrene and sulfonated polystyrene, and twice that of nonfluorous block copolymer membranes based on sulfonated poly(styrene-b-[ethylene-co-butylene]-b-styrene) (S-SEBS) and sulfonated hydrogenated poly(butadiene-b-styrene) (S-HPBS) copolymers. TEM revealed a disruption in ordered morphology with increasing degree of sulfonation. Morphological structures of membranes having 0.6-1.2 mmol/g IEC comprised of interconnected networks of ion channels, each of 8-15 nm width.

show abstract

Section: Introductionmentioning

confidence: 99%

Synthesis and Proton Conductivity of Partially Sulfonated Poly([vinylidene difluoride-co-hexafluoropropylene]-b-styrene) Block Copolymers

2005

View full text Add to dashboard Cite

show abstract

“…[8][9][10][11][12][13][14][15][16] Sulfonated poly-(styrene-b-isobutylene-b-styrene) block copolymer (S-SIBS) has been synthesized in order to study methanol and proton transport properties 17,18 and to develop novel ion-containing polymer composites. 12,13 Other polystyrene block copolymer membranes that have been prepared and studied include sulfonated hydrogenated poly(butadiene-b-styrene) diblock copolymer (S-HPBS), 19,20 sulfonated poly(styrene-b-[ethylenealt-propylene]) (S-SEP), 21,22 and poly(styrene-b-ethylene/ propylene-b-styrene) (S-SEPS). 22 In this paper, we use a new model diblock copolymer system to study the correlation between structure and transport properties in these materials.…”

Section: Introductionmentioning

confidence: 99%

Structural Study of Proton-Conducting Fluorous Block Copolymer Membranes

et al. 2005

View full text Add to dashboard Cite

Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://doi.org/10.1021/ma0520139Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Structural study of proton-conducting fluorous block copolymer membranes Rubatat, Laurent; Shi, Zhiqing; Diat, Olivier; Holdcroft, Steven; Frisken, Barbara J. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/eng/view/object/?id=76f13d5a-1e86-4a52-b004-319320053417 http://nparc.cisti-icist.nrc-cnrc.gc.ca/fra/voir/objet/?id=76f13d5a-1e86-4a52-b004-319320053417 Burnaby, BC V5A 1S6, Canada; Institute for Fuel Cell InnoVation, National Research Council Canada, 3250 East Mall, VancouVer, BC V6T 1W5, Canada; and UMR SPrAM 5819, CEA-Grenoble, 17 aV. des Martyrs, 38054 Grenoble, Cedex 9, France ReceiVed September 15, 2005; ReVised Manuscript ReceiVed NoVember 3, 2005 ABSTRACT: Small-angle neutron scattering with contrast variation and transmission electron microscopy have been used to investigate the nanostructure of films cast from diblock copolymer solutions. The polymers are composed of a fluorocarbon block and a sulfonated polystyrene block, where the length and degree of sulfonation of the polystyrene segment have been controlled. This study shows that these films possess structure at two length scales: phase separation at length scales of the order of 40 nm due to the immiscibility of the two polymer blocks and substructure within the sulfonated polystyrene domains due to segregation of the hydrated ionic groups and the hydrophobic polystyrene chains. The longer length scale morphology is well-ordered for diblocks containing long and partially sulfonated polystyrene blocks whereas the short and fully sulfonated polystyrene blocks give rise to a more disordered structure.

show abstract

“…SEBS is a commercially available thermoplastic elastomer. The styrene blocks of the SEBS can be subsequently sulfonated providing high ionic conductivity [27][28][29][30][31]. The membranes based on sulfonated SEBS (s-SEBS) are reported to be less expensive to produce than Nafion ® .…”

Section: E-mail Addressmentioning

confidence: 99%

Non-fluorinated proton-exchange membranes based on melt extruded SEBS/HDPE blends

Mokrini

Huneault

Shi

et al. 2008

Journal of Membrane Science

Self Cite

View full text Add to dashboard Cite

This paper reports on functional polymer blends prepared by melt-processing technologies for proton-exchange membrane applications. Styrene-ethylene/butylene-styrene (SEBS) and high-density polyethylene (HDPE) were melt blended using twin-screw compounding, extruded into thin films by extrusion-calendering. The films were then grafted with sulfonic acid moieties to obtain ionic conductivity leading to proton-exchange membranes. The effect of blend composition and sulfonation time was investigated. The samples were characterized in terms of morphology, microstructure, thermo-mechanical properties and in terms of their conductivity, ion exchange capacity (IEC) and water uptake in an effort to relate the blend microstructure to the membrane properties. The HDPE was found to be present in the form of elongated structures which created an anisotropic structure especially at lower concentrations. The HDPE increased the membrane mechanical properties and restricted swelling, water uptake and methanol crossover. Room temperature through-plane conductivities of the investigated membranes were up to 4.5E−02Scm −1 at 100% relative humidity, with an ionic exchange capacity of 1.63 meq g −1 .Crown

show abstract

Synthesis and characterization of new ion conductors based on butadiene styrene copolymers

Cited by 37 publications

References 7 publications

Synthesis and Proton Conductivity of Partially Sulfonated Poly([vinylidene difluoride-co-hexafluoropropylene]-b-styrene) Block Copolymers

Synthesis and Proton Conductivity of Partially Sulfonated Poly([vinylidene difluoride-co-hexafluoropropylene]-b-styrene) Block Copolymers

Structural Study of Proton-Conducting Fluorous Block Copolymer Membranes

Non-fluorinated proton-exchange membranes based on melt extruded SEBS/HDPE blends

Contact Info

Product

Resources

About