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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XIX Italian Society of Rheology Conference

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The Italian Society of Rheology (SIR) organizes every two years the Italian Rheology Conference, which is the meeting point of the National and International rheological community to promote knowledge and discuss research in the field of rheology. The Conference consists of keynote lectures, oral communications and posters on topics related to all the thematic areas of rheology. The XIX edition will be held in the conference rooms of Plesso Belmeloro, in the city centre of Bologna, in June 16th-19th, 2026. Book your accommodation in Bologna well in advance, the city is a famous tourist destination and has limited availability of accommodations!

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