Phase Diagram of the Aqueous Poly(propilene oxide)-Poly(ethylene Oxide)-Poly(propilene oxide) Triblock Copolymer System

Phase Diagram of the Aqueous Poly(propilene oxide)-Poly(ethylene Oxide)-Poly(propilene oxide) Triblock Copolymer System

Autori: G. Mangiapia, L. Pianese, O. Ortona, L. Padano, N. Grizzuti G.D. D’Errico, R. Sartorio
Presentato al: TOP Times of Polymers
Anno: 2002
Volume: Unico - Issue: Unico
Casa Editrice:
Lingua: English

Abstract
Structural studies are presented on the Pluronic R® copolymer 25R4 formed by a central poly(ethylene) block enclosed between two symmetric poly(propylene oxide) blocks [(PPO)22-(PEO)38-(PPO)22]. Differently from direct Pluronic®, at low temperature and copolymer concentration, the 25R4 is present as a non-aggregated macromolecule in solution. This evidence is confirmed by several techniques such as NMR-PGSE, light scattering, hydrophobic probe solubilization, surface tension. Its gyration radius is about 30 Å as shown by SANS and SAXS. However, if temperature is slightly increased preliminary light scattering data show incipient aggregation.

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XVIII Italian Society of Rheology Conference

Capri Island, Naples, Italy 12-14 septemper 2024

Per saperne di piú

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The XVIII edition of the SIR conference will be held in Villa Rosa, a recently renovated ancient Neapolitan villa in Capri Island (Naples, Italy), in September 12th-14th 2024. The event will be organised with the support of the Department of Chemical, Materials and Industrial Production Engineering of the University of Naples Federico II.

All those with an interest in rheology, in all its aspects, are invited to submit contributions.

Selected papers will be eligible for a special issue in Rheologica Acta.

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