Publication
Some Aspects of the Rheo-Nmr Behavior of the Lyotropic Liquid Crystal Poly(γ-BENZYL-L GLUTAMATE) in m-Creso
| dc.contributor.author | Leal, Catarina R. | |
| dc.contributor.author | Klink, Jacques | |
| dc.contributor.author | Martins, Assis | |
| dc.date.accessioned | 2024-11-19T10:01:49Z | |
| dc.date.available | 2024-11-19T10:01:49Z | |
| dc.date.issued | 2004-01-01 | |
| dc.description.abstract | We report the use of 2 H NMR spectroscopy to study the director orientation in two nematic solutions of poly(c-benzyl-L-glutamate) (PBLG) in m-cresol during simple shear flow and after its sudden cessation. In the range of applied shear rates ðc_ ¼ 5 ... 150 s 1Þ, a steady-state NMR line shape is reached after a deformation of a few hundred units. Two different line shapes occur that can be related to distinct shear responses in mechanical rheology: the tumbling=wagging and the flow-aligning regimes. The relaxation after cessation of the shear is similar for both cases and essentially follows the ‘‘inhomogeneous reorientation’’ regime known from sudden-rotation NMR experiments. A fit of the relaxation curves indicates that the tumbling parameter k is (slightly) less than one, as expected for a tumbling system. | pt_PT |
| dc.description.version | info:eu-repo/semantics/publishedVersion | pt_PT |
| dc.identifier.citation | Leal CR, Klink J, Martins A – Some Aspects of the Rheo-Nmr Behavior of the Lyotropic Liquid Crystal Poly(γ-BENZYL-L GLUTAMATE) in m-Creso. Molecular Crystals and Liquid Crystals. ISSN 1542-1406. 2004, 420(1): 35-45. https://doi.org/10.1080/15421400490478344 | pt_PT |
| dc.identifier.doi | 10.1080/15421400490478344 | pt_PT |
| dc.identifier.eissn | 1563-5287 | |
| dc.identifier.issn | 1542-1406 | |
| dc.identifier.uri | http://hdl.handle.net/10400.21/17934 | |
| dc.language.iso | eng | pt_PT |
| dc.peerreviewed | yes | pt_PT |
| dc.publisher | Taylor & Francis | pt_PT |
| dc.relation.publisherversion | https://www.tandfonline.com/doi/pdf/10.1080/15421400490478344 | pt_PT |
| dc.subject | liquid crystal polymer | pt_PT |
| dc.subject | PBLG | pt_PT |
| dc.subject | Rheo-NMR | pt_PT |
| dc.title | Some Aspects of the Rheo-Nmr Behavior of the Lyotropic Liquid Crystal Poly(γ-BENZYL-L GLUTAMATE) in m-Creso | pt_PT |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.citation.endPage | 45 | pt_PT |
| oaire.citation.issue | 1 | pt_PT |
| oaire.citation.startPage | 35 | pt_PT |
| oaire.citation.title | Molecular Crystals and Liquid Crystals | pt_PT |
| oaire.citation.volume | 420 | pt_PT |
| person.familyName | Marques Mendes Almeida da Rosa Leal | |
| person.givenName | Catarina | |
| person.identifier | A-2814-2009 | |
| person.identifier.ciencia-id | AF15-486E-BB15 | |
| person.identifier.orcid | 0000-0001-5871-4936 | |
| person.identifier.scopus-author-id | 7005379280 | |
| rcaap.rights | closedAccess | pt_PT |
| rcaap.type | article | pt_PT |
| relation.isAuthorOfPublication | 4db8990d-5eb1-4515-ae7a-68873cf776a5 | |
| relation.isAuthorOfPublication.latestForDiscovery | 4db8990d-5eb1-4515-ae7a-68873cf776a5 |