Repository logo
 
Publication

Experimental results on electrorheology of liquid crystalline polymer solutions

2008-07-07Conference object Open access
Simple item page
dc.contributor.authorNeves, S.
dc.contributor.authorLeal, Catarina R.
dc.contributor.authorCidade, M. T.
dc.date.accessioned2024-11-19T09:41:13Z
dc.date.available2024-11-19T09:41:13Z
dc.date.issued2008-07-07
dc.description.abstractThe electrorheological (ER) effect is known as the enhancement of the apparent viscosity upon apphcation of an external electric field. Suspensions of polarizable particles in non-conducting solvents are the most studied electrorheological fluids, however, liquid crystalline materials may also present ER effect as long as their dielectric anisotropy is positive. In the liquid crystalline state of a positive dielectric anisotropy, the application of the electric field makes the director align perpendicular to the fiow direction, thus increasing the apparent viscosity. In this work results of two liquid crystalline polymer solutions, acetoxypropylcellulose (APC) in dimethylacetamide (DMAc) and poly-y-benzyl-L-glutamate (PBLG) in 1,4-dioxane, presenting opposite behavior upon application of the electric field, will be presented. APC/DMAc (negative dielectric anisotropy) presents a decrease of the apparent viscosity upon application of the electric field, as expected, while PBLG/l,4-dioxane (positive dielectric anisotropy) presents the opposite behavior. For this last solution we will present the shear fiow curves for different electric fields in function of polymer molecular weight and solution concentration.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationNeves S, Leal CR, Cidade MT – Experimental results on electrorheology of liquid crystalline polymer solutions. AIP Conference Proceedings. eISSN 1551-7616. 2008, 1027(1): 1429-1431. https://doi.org/10.1063/1.2964598pt_PT
dc.identifier.doi10.1063/1.2964598pt_PT
dc.identifier.eissn1551-7616
dc.identifier.issn0094-243X
dc.identifier.urihttp://hdl.handle.net/10400.21/17931
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherAIP Publishingpt_PT
dc.relation.publisherversionhttps://pubs.aip.org/aip/acp/article/1027/1/1429/848307/Experimental-Results-on-Electrorheology-of-Liquidpt_PT
dc.subjectelectrorheologypt_PT
dc.subjectPBLGpt_PT
dc.subjectliquid crystalline polymerspt_PT
dc.titleExperimental results on electrorheology of liquid crystalline polymer solutionspt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.citation.endPage1431pt_PT
oaire.citation.issue1pt_PT
oaire.citation.startPage1429pt_PT
oaire.citation.titleAIP Conference Proceedingspt_PT
oaire.citation.volume1027pt_PT
person.familyNameMarques Mendes Almeida da Rosa Leal
person.givenNameCatarina
person.identifierA-2814-2009
person.identifier.ciencia-idAF15-486E-BB15
person.identifier.orcid0000-0001-5871-4936
person.identifier.scopus-author-id7005379280
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
relation.isAuthorOfPublication4db8990d-5eb1-4515-ae7a-68873cf776a5
relation.isAuthorOfPublication.latestForDiscovery4db8990d-5eb1-4515-ae7a-68873cf776a5

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
Experimental_CRLeal.pdf
Size:
520.25 KB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

ISEL - Física - Comunicações