Abstract
The structural properties of PEO-PPO-PEO block copolymers dissolved in water have been studied by small-angle neutron scattering. Three different phases appear. At low temperature (T≤15°C) the block copolymers are dissolved as individual Gaussian chains (unimers). At intermediate temperatures, the hydrophobic nature of PPO causes aggregation into a liquid of micelles. At even higher temperature (T≥36.5 °C for the 28% polymer solution) the micellar liquid “freezes” into a cubic crystalline powder, which can be aligned by shear into a single crystal.
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References
Zhou Z, Chu B (1987) Macromolecules 20:3089; (1988) J Colloid Interface Sci 126:171
Vadnere M, Amidon GL, Lindenbaum S, Haslam JL (1984) Int J Pharm 22:207
Wanka G, Hoffmann H, Ulbricht W (1990) Colloid Polym Sci 268:101
Brown B, Schillen K, Almgren M, Hvidt S, Bahadur P (1991) J Phys Chem 95:1850
Wang P, Johnston TP (1991) J Appl Polymer Sci 43:283
Mortensen K, Brown W, Nordén B (1992) Phys Rev Letters 13:2340
Nordén B, Elvingson C, Eriksson T, Kubista M, Sjöberg B, Takahashi M, Mortensen K (1990) J Mol Biol 216:223
Kinning DJ, Thomas EL (1984) Macromolecules 17:1712
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© 1993 Dr. Dietrich Steinkopff Verlag GmbH & Co. KG
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Mortensen, K. (1993). PEO-PPO-PEO block polymer in aqueous solution: Micelle formation and crystallization. In: Ewen, B., Fischer, E.W., Fytas, G. (eds) Application of Scattering Methods to the Dynamics of Polymer Systems. Progress in Colloid & Polymer Science, vol 91. Steinkopff. https://doi.org/10.1007/BFb0116460
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DOI: https://doi.org/10.1007/BFb0116460
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Publisher Name: Steinkopff
Print ISBN: 978-3-7985-0952-8
Online ISBN: 978-3-7985-1678-6
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