Clouding behaviour of PEO-PPO based triblock copolymers in aqueous ionic surfactant solutions: a new approach for cloud point measurements

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dc.contributor.authorPatel, Ten_AU
dc.contributor.authorBahadur, Pen_AU
dc.contributor.authorMata, JPen_AU
dc.date.accessioned2010-07-02T06:09:27Zen_AU
dc.date.available2010-07-02T06:09:27Zen_AU
dc.date.issued2010-05-15en_AU
dc.date.statistics2010-05-15en_AU
dc.description.abstractThe cloud points (CP) of 1 g/dl solutions of polyethylene oxide–polypropylene oxide (PEO–PPO) based triblock copolymers (Pluronics® P84, L64, L44 and Reverse Pluronics® 10R5, 25R4, 17R4) were measured as a function of their molecular weight and added ionic surfactant. For identical PEO/PPO ratios, copolymers with lower molecular weight show a larger increase in the cloud point in the presence of surfactants than polymers with higher molecular weight. The opposite trend has been observed for reverse Pluronics. The cloud points of polymers with different PEO/PPO ratios have also been reported. An increase in the size of the middle PEO block in reverse Pluronics has a more significant effect on cloud points than molecular weight increment. Ionic surfactants produced marked increases in the cloud points of copolymer solutions. The effect was much larger for surfactants with higher hydrophobicity. Cationic surfactants with different chain lengths were used to examine the surfactant–polymer interaction. A novel approach for normalising the cloud points to their relative values has been carried out to see the clear effect of ionic surfactants. Tri component systems, comprising polymers, cetyltrimethylammonium bromide (C16TABr) surfactant and salt (NaBr), have also been studied to see the effect of salt on the phase separation behaviour of solutions within the framework of our new cloud point approach. © 2010, Elsevier Ltd.en_AU
dc.identifier.citationPatel, T., Bahadur, P., & Mata, J. (2010). Clouding behaviour of PEO-PPO based triblock copolymers in aqueous ionic surfactant solutions: a new approach for cloud point measurements. Journal of Colloid and Interface Science, 345(2), 346-350. doi:10.1016/j.jcis.2010.01.079en_AU
dc.identifier.govdoc1823en_AU
dc.identifier.issn0021-9797en_AU
dc.identifier.issue2en_AU
dc.identifier.journaltitleJournal of Colloid and Interface Scienceen_AU
dc.identifier.pagination346-350en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.jcis.2010.01.079en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/1725en_AU
dc.identifier.volume345en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectPluronicsen_AU
dc.subjectPolyethylene glycolsen_AU
dc.subjectPolypropyleneen_AU
dc.subjectMolecular weighten_AU
dc.subjectSurfactantsen_AU
dc.subjectCopolymersen_AU
dc.titleClouding behaviour of PEO-PPO based triblock copolymers in aqueous ionic surfactant solutions: a new approach for cloud point measurementsen_AU
dc.typeJournal Articleen_AU
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