Structural study of proton-conducting fluorous block copolymer membranes

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DOIResolve DOI: http://doi.org/10.1021/ma0520139
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TypeArticle
Journal titleMacromolecules
ISSN0024-9297
1520-5835
Volume39
Issue2
Pages720730
AbstractSmall-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.
Publication date
PublisherAmerican Chemical Society
LanguageEnglish
AffiliationNational Research Council Canada; NRC Institute for Fuel Cell Innovation
Peer reviewedYes
NPARC number23001998
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Record identifier76f13d5a-1e86-4a52-b004-319320053417
Record created2017-07-14
Record modified2017-07-14
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