The DOI matches its Crossref record; 24 of the 24 references it cites were found in a registry or an index.
Effect of Molecular Weight on the Mechanical and Electrical Properties of Block Copolymer Electrolytes
Abstract
The relationship between ionic conductivity, morphology, and rheological properties of polystyrene- block -poly(ethylene oxide) copolymers (SEO) doped with a lithium salt, Li[N(SO 2 CF 3 ) 2 ], is elucidated. We focus on lamellar samples with poly(ethylene oxide) (PEO) volume fractions, φ, ranging from 0.38 to 0.55, and PEO block molecular weights, M PEO, ranging from 16 to 98 kg/mol. The low-frequency storage modulus ( G ‘) at 90 °C increases with increasing M PEO from about 4 × 10 5 to 5 × 10 7 Pa. Surprisingly, the conductivity of the SEO/salt mixtures with the molar ratio of Li to ethylene oxide moieties of 0.02 σ, also increases with increasing M PEO, from 6.2 × 10 -5 to 3.6 × 10 -4 S/cm at 90 °C. We compare σ with the conductivity of pure PEO/salt mixtures, σ PEO, and find that σ/[φσ PEO ] of our highest molecular weight sample is close to 0.67, the theoretical upper limit for transport through randomly oriented lamellar grains.
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Metadata
- Authors
- Singh, M., Odusanya, O., Wilmes, G. M., Eitouni, H. B., Gomez, E. D., Patel, A. J., Chen, V. L., Park, M. J., Fragouli, P., Iatrou, H., Hadjichristidis, N., Cookson, D., & Balsara, N. P.
- Venue
- Macromolecules
- Publisher
- American Chemical Society (ACS)
- Published
- 2007-05-25
- Volume
- 40
- Issue
- 13
- Pages
- 4578-4585
- ISSN
- 0024-9297 (ISSN-L)
- 1520-5835
- OpenAlex
- W2082866588
- Cited by
- 511
- References
- 24
- FWCI
- 9.45
- Type
- journal article
- Language
- en
- Open access
- closed
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