The DOI matches its Crossref record; 3 of the 3 references it cites were found in a registry or an index.
Poly(ethylene oxide-b-isoprene) Diblock Copolymer Phase Diagram
Abstract
The phase state of 25 poly(ethylene oxide- b -isoprene) (PEO−PI) diblock copolymers spanning the composition range 0.05 < f PEO < 0.8 has been studied using small-angle X-ray scattering and rheology. In addition, the thermal and thermodynamic properties have been obtained from differential scanning calorimetry and pressure−volume−temperature measurements. Twenty of the diblocks exhibit at least one order-to-order transition, and two show four ordered phases. The phase diagram consists of four equilibrium phases in the melt; lamellar (Lam), hexagonally packed cylinders (Hex), spheres packed in a body centered cubic lattice (bcc) and a bicontinuous cubic phase with the Ia 3̄ d space group symmetry known as the gyroid phase. The latter is formed for the range of compositions 0.4 < f PEO < 0.45 which are the highest ever reported for a stable gyroid phase. The high asymmetry in the present phase diagram is attributed to the high conformational asymmetry of the PEO and PI (ε = 2.72). At low temperatures, upon PEO crystallization, all phases revert to the crystalline lamellar structure (L c ). Within the composition range 0.66 < f PEO < 0.7 another intermediate phase is formed known as perforated layers (PL) which is clearly not an equilibrium phase. The thermal expansion coefficient was found to be a sensitive probe of the ordered microstructures.
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Cites
The Physics of Block Copolymers
Hamley, I. W. (1998) · doi:10.1093/oso/9780198502180.001.0001 · Cited by 1,913
Organically modified aluminosilicate mesostructures from block copolymer phases
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Self-citationMorphologies of Microphase-Separated A2B Simple Graft Copolymers
Pochan, D. J., Gido, S. P., Pispas, S., Mays, J. W., Ryan, A. J., Fairclough, J. P. A., Hamley, I. W., & Terrill, N. J. (1996) · Macromolecules · doi:10.1021/ma951696x · Cited by 129
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Herzberger, J., Niederer, K., Pohlit, H., Seiwert, J., Worm, M., Wurm, F. R., & Frey, H. (2016) · Chemical Reviews · doi:10.1021/acs.chemrev.5b00441 · Cited by 865
Orilall, M. C., & Wiesner, U. (2011) · Chem. Soc. Rev. · doi:10.1039/c0cs00034e · Cited by 520
Self-citationPhase Behaviour and Morphologies of Block Copolymers
Abetz, V., & Simon, P. F. W. (2005) · Advances in Polymer Science · doi:10.1007/12_004 · Cited by 361
Supramolecular Block Copolymers with Cucurbit[8]uril in Water
Rauwald, U., & Scherman, O. A. (2008) · Angewandte Chemie International Edition · doi:10.1002/anie.200705591 · Cited by 296
Nucleation and Crystallization in Diblock and Triblock Copolymers
Müller, A. J., Balsamo, V., & Arnal, M. L. (2005) · Advances in Polymer Science · doi:10.1007/12_001 · Cited by 294
Metadata
- Authors
- Floudas, G., Vazaiou, B., Schipper, F., Ulrich, R., Wiesner, U., Iatrou, H., & Hadjichristidis, N.
- Venue
- Macromolecules
- Publisher
- American Chemical Society (ACS)
- Published
- 2001-03-27
- Volume
- 34
- Issue
- 9
- Pages
- 2947-2957
- ISSN
- 0024-9297 (ISSN-L)
- 1520-5835
- OpenAlex
- W1964149384
- Cited by
- 158
- References
- 3
- FWCI
- 7.55
- Type
- journal article
- Language
- en
- Open access
- closed
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