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Rheological characterization of BCC and FCC structures in aqueous diblock copolymer liquid crystals

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Abstract

Low molecular weight, amphiphilic diblock copolymers in selective solvent exhibit complex phase behavior and macroscopic properties that affect the processing and application of these materials. The mechanical properties of the crystalline phases seen in concentrated solutions are dependent on nanoscale structure and sample history. The goal of this study is to characterize macroscopic properties and thermal history effects of lyotropic liquid crystals in aqueous diblock copolymer solutions. Rheological temperature ramps are used to characterize three aqueous concentrations of diblock copolymer [Brij-58®, C16H33(CH2CH2O)20OH]. Between these three samples the order-disorder transitions (ODTs) for BCC and FCC are accessible in addition to the order-order transition (OOT) between BCC and FCC. These transitions are distinguished using rheology. Frequency sweeps are performed across a range of temperatures and parameterized with a loglinear fit to the phase angle data to extract the crossover frequency. We find that a single frequency sweep does not distinguish BCC and FCC structures. By normalizing the temperature with respect to the ODT, we are able to use a series of frequency sweeps to distinguish characteristic trends in the response of BCC and FCC structures to thermal history.

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References

  • Bang, J. and T. Lodge, 2003, Mechanisms and epitaxial relationships between close-packed and BCC lattices in block copolymer solutions, J. Phys. Chem. B 107, 12071–12081.

    Article  CAS  Google Scholar 

  • Eiser, E., F. Molino, and G. Porte, 2000a, Correlation between the viscoelastic properties of a soft crystal and its microstructure, Eur. Phys. J. E 2, 39–46.

    Article  CAS  Google Scholar 

  • Eiser, E., F. Molino, G. Porte, and X. Pithon, 2000b, Flow in micellar cubic crystals, Rheol. Acta 39, 201–208.

    Article  CAS  Google Scholar 

  • Garti, N., P. Somasundaran, and R. Mezzenga, 2012, Self-Assembled Supramolecular Architectures: Lyotropic Liquid Crystals, John Wiley & Sons, Hoboken.

    Book  Google Scholar 

  • Hamley, I., 2005, Block Copolymers in Solution: Fundamentals and Applications, John Wiley & Sons, Chichester.

    Book  Google Scholar 

  • Jayaraman, A., D.Y. Zhang, B.L. Dewing, and M.K. MahanthappaMahanthappa, 2019, Path-dependent preparation of complex micelle packings of a hydrated diblock oligomer, ACS Cent. Sci. 5, 619–628.

    Article  CAS  Google Scholar 

  • Jones, J.L. and T.C.B. McLeish, 1995, Rheological response of surfactant cubic phases, Langmuir 11, 785–792.

    Article  CAS  Google Scholar 

  • LaFollette, T.A. and L.M. Walker, 2011, Structural and mechanical hysteresis at the order-order transition of block copolymer micellar crystals, Polymers 3, 281–298.

    Article  CAS  Google Scholar 

  • Lodge, T.P., B. Pudil, and K.J. Hanley, 2002, The full phase behavior for block copolymers in solvents of varying selectivity, Macromolecules 35, 4707–4717.

    Article  CAS  Google Scholar 

  • May, A., K. Aramaki, and J.M. Gutiérrez, 2011, Phase behavior and rheological analysis of reverse liquid crystals and W/I2 and W/H2 gel emulsions using an amphiphilic block copolymer, Langmuir 27, 2286–2298.

    Article  CAS  Google Scholar 

  • Mezzenga, R., C. Meyer, C. Servais, A.I. Romoscanu, L. Sagalowicz, and R.C. Hayward, 2005, Shear rheology of lyotropic liquid crystals: A case study, Langmuir 21, 3322–3333.

    Article  CAS  Google Scholar 

  • Mohan, P.H. and R. Bandyopadhyay, 2008, Phase behavior and dynamics of a micelle-forming triblock copolymer system, Phys. Rev. E 77, 041803.

    Article  Google Scholar 

  • Park, M.J., J. Bang, T. Harada, K. Char, and T.P. Lodge, 2004, Epitaxial transitions among FCC, HCP, BCC, and cylinder phases in a block copolymer solution, Macromolecules 37, 9064–9075.

    Article  CAS  Google Scholar 

  • Park, M.J., K. Char, J. Bang, and T.P. Lodge, 2005, Interplay between cubic and hexagonal phases in block copolymer solutions, Langmuir 21, 1403–1411.

    Article  CAS  Google Scholar 

  • Pozzo, D.C., K.R. Hollabaugh, and L.M. Walker, 2005, Rheology and phase behavior of copolymer-templated nanocomposite materials, J. Rheol. 49, 759–782.

    Article  CAS  Google Scholar 

  • Rodríguez-Abreu, C., M. García-Roman, and H. Kunieda, 2004, Rheology and dynamics of micellar cubic phases and related emulsions, Langmuir 20, 5235–5240.

    Article  Google Scholar 

  • Speziale, C., R. Ghanbari, and R. Mezzenga, 2018, Rheology of ultraswollen bicontinuous lipidic cubic phases, Langmuir 34, 5052–5059.

    Article  CAS  Google Scholar 

  • Walz, M., M. Wolff, N. Voss, H. Zabel, and A. Magerl, 2010, Micellar crystallization with a hysteresis in temperature, Langmuir 26, 14391–14394.

    Article  CAS  Google Scholar 

Download references

Acknowledgments

The authors would like to thank Mahesh Mahanthappa and Ashish Jayaraman at the University of Minnesota for providing access to the pre-print phase diagram of Brij- 58® and water in addition to complementary SAXS data.

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Authors and Affiliations

  1. Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, 15213, USA

    Connor S. Valentine & Lynn M. Walker

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  1. Connor S. Valentine
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  2. Lynn M. Walker
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Correspondence to Lynn M. Walker.

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This paper is based on an invited lecture presented by the corresponding author at the 30th Anniversary Symposium of the Korean Society of Rheology (The 18th International Symposium on Applied Rheology (ISAR)), held on May 21-24, 2019, Seoul.

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Valentine, C.S., Walker, L.M. Rheological characterization of BCC and FCC structures in aqueous diblock copolymer liquid crystals. Korea-Aust. Rheol. J. 31, 249–254 (2019). https://doi.org/10.1007/s13367-019-0025-2

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  • DOI: https://doi.org/10.1007/s13367-019-0025-2

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