Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/3827
DC Field | Value | Language |
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dc.contributor.author | Azevedo, R. Gomes de | - |
dc.contributor.author | Rebelo, L. P. N. | - |
dc.contributor.author | Ramos, A. M. | - |
dc.contributor.author | Szydlowski, J. | - |
dc.contributor.author | Sousa, H. C. de | - |
dc.contributor.author | Klein, J. | - |
dc.date.accessioned | 2008-08-29T15:27:05Z | - |
dc.date.available | 2008-08-29T15:27:05Z | - |
dc.date.issued | 2001 | en_US |
dc.identifier.citation | Fluid Phase Equilibria. 185:1-2 (2001) 189-198 | en_US |
dc.identifier.uri | https://hdl.handle.net/10316/3827 | - |
dc.description.abstract | Phase diagrams of poly(N-isopropylacrylamide) (PNIPAAM) as well as of hydrophilically-modified copolymers in aqueous solution were determined. A high-accuracy He-Ne Laser scattering technique was used for the detection of operational spinodal (sp) and cloud-point (cp) curves. Polymer concentration was varied from 0.5 to 20 wt.%. In the case of copoly(PNIPAAM/vinylsaccharide) several different chain lengths were considered. Pressure (up to 400 bar) and solvent isotope effects were studied. We predict a closed-loop type phase diagram for the copolymers, which presents an estimated hypercritical point in H2O solutions at Mw~0.5×105, although only lower critical solution temperature (LCST) is experimentally accessible. At lower molecular weights, the solutions are always in the one-phase region. | en_US |
dc.description.uri | http://www.sciencedirect.com/science/article/B6TG2-43MC9F5-N/1/63fb7dd8bec4ff798723b9bcb318a0a5 | en_US |
dc.format.mimetype | aplication/PDF | en |
dc.language.iso | eng | eng |
dc.rights | openAccess | eng |
dc.subject | Liquid-liquid equilibria | en_US |
dc.subject | Polyacrylamides | en_US |
dc.subject | Polymeric aqueous solutions | en_US |
dc.subject | Pressure effects | en_US |
dc.subject | Isotope effects | en_US |
dc.title | Phase behavior of (polyacrylamides + water) solutions: concentration, pressure and isotope effects | en_US |
dc.type | article | en_US |
dc.identifier.doi | 10.1016/s0378-3812(01)00469-1 | - |
item.fulltext | Com Texto completo | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.openairetype | article | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
crisitem.author.researchunit | CIEPQPF – Chemical Process Engineering and Forest Products Research Centre | - |
crisitem.author.parentresearchunit | Faculty of Sciences and Technology | - |
crisitem.author.orcid | 0000-0002-2629-7805 | - |
Appears in Collections: | FCTUC Eng.Química - Artigos em Revistas Internacionais |
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filefdcba771600e4ba8b90e27a471a8b65e.pdf | 107.49 kB | Adobe PDF | View/Open |
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