Phase Behavior of Reverse Poloxamers and Poloxamines in Water


Autoria(s): Larraneta Landa, Eneko; Ramon Isasi, Jose
Data(s)

29/01/2013

Resumo

<p>The phase behavior of two types of poly(ethylene oxide)/poly(propylene oxide) (PEO/PPO) copolymers in aqueous solutions was studied by light scattering, viscometry, and infrared spectroscopy. Both the reverse poloxamer (Pluronic 10R5) and the star type poloxamine (Tetronic 90R4) have practically the same PEO/PPO ratio with their hydrophobic blocks (PPO) located in the outer part. The temperature-composition phase diagrams show that both 10R5 and 90R4 tend to form aggregates in water. Up to four different phases can be detected in the case of Tetronic 90R4 for each temperature: unimers, random networks, micellar networks, and macrophase separation. Viscometric and infrared measurements complemented the results obtained by light scattering and visual inspection.</p>

Identificador

http://pure.qub.ac.uk/portal/en/publications/phase-behavior-of-reverse-poloxamers-and-poloxamines-in-water(3e77f2a9-25b1-4501-afcc-9db7685512b1).html

http://dx.doi.org/10.1021/la304245p

Idioma(s)

eng

Direitos

info:eu-repo/semantics/restrictedAccess

Fonte

Larraneta Landa , E & Ramon Isasi , J 2013 , ' Phase Behavior of Reverse Poloxamers and Poloxamines in Water ' Langmuir , vol 29 , no. 4 , pp. 1045-1053 . DOI: 10.1021/la304245p

Palavras-Chave #OXIDE) TRIBLOCK COPOLYMERS #AQUEOUS-SOLUTIONS #POLY(ETHYLENE OXIDE) #BLOCK-COPOLYMER #MICELLE FORMATION #ASSOCIATIVE BEHAVIOR #FTIR SPECTROSCOPY #SALT-SOLUTION #MICELLIZATION #SCATTERING
Tipo

article