DOI: 10.1126/science.271.5251.976. Complex Phase Behavior in Solvent-Free Nonionic Surfactants

Complex Phase Behavior in Solvent-Free Nonionic Surfactants

10.1126/science.271.5251.976

Crossref journal-article

American Association for the Advancement of Science (AAAS)

Science (221)

Abstract

Unsolvated block copolymers and surfactant solutions are “soft materials” that share a common set of ordered microstructures. A set of polyethyleneoxide-polyethylethylene (PEO-PEE) block copolymers that are chemically similar to the well-known alkane-oxyethylene (C n EO m ) nonionic surfactants was synthesized here. The general phase behavior in these materials resembles that of both higher molecular weight block copolymers and lower molecular weight nonionic surfactant solutions. Two of the block copolymers exhibited thermally induced order-order transitions and were studied in detail by small-angle scattering. The fundamental microstructural spacing was determined to be a crucial parameter in these transitions. Transitions from one ordered state to another occur only when the lattice spacing is nearly matched. These materials highlight the importance of epitaxy and molecular conformation in the phase transformations of soft material.

Bibliography

Hillmyer, M. A., Bates, F. S., Almdal, K., Mortensen, K., Ryan, A. J., & Fairclough, J. P. A. (1996). Complex Phase Behavior in Solvent-Free Nonionic Surfactants. Science, 271(5251), 976â978.

Authors 6

Marc A. Hillmyer (first)
Frank S. Bates (additional)
Kristoffer Almdal (additional)
Kell Mortensen (additional)
Anthony J. Ryan (additional)
J. Patrick A. Fairclough (additional)

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Dates

Type	When
Created	18 years, 10 months ago (Oct. 27, 2006, 2:30 p.m.)
Deposited	1 year, 7 months ago (Jan. 12, 2024, 4:06 p.m.)
Indexed	3 months ago (May 27, 2025, 11:48 a.m.)
Issued	29 years, 6 months ago (Feb. 16, 1996)
Published	29 years, 6 months ago (Feb. 16, 1996)
Published Print	29 years, 6 months ago (Feb. 16, 1996)

Funders 0

None

BibTeX

@article{Hillmyer_1996, title={Complex Phase Behavior in Solvent-Free Nonionic Surfactants}, volume={271}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.271.5251.976}, DOI={10.1126/science.271.5251.976}, number={5251}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Hillmyer, Marc A. and Bates, Frank S. and Almdal, Kristoffer and Mortensen, Kell and Ryan, Anthony J. and Fairclough, J. Patrick A.}, year={1996}, month=feb, pages={976–978} }

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