Ralph Colby

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IEE Research Themes
Affiliate Researcher
Titles and Affiliations
Professor, Materials Science and Engineering

Research Summary

Research interests include proteins, polyelectrolytes, ionomers, liquid crystalline polymers, block copolymers, miscible polymer blends, branched polymers, networks, glass-forming liquids, and surfactants and colloidal suspensions. Ion-containing polymers are a poorly understood class of materials that are potentially very important for actuators, sensors, separators between the electrodes of advanced batteries and fuel cell membranes.

Research Keywords

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Recent Publications

Molecular Weight Characterization of Conjugated Polymers through Gel Permeation Chromatography and Static Light Scattering

Fair, R. A., Xie, R., Lee, Y., Colby, R. H. & Gomez, E. D., Sep 10 2021, In: ACS Applied Polymer Materials. 3, 9, p. 4572-4578 7 p.

Research output: Contribution to journalArticlepeer-review

Rheology of Entangled Polyelectrolyte Solutions

Han, A. & Colby, R. H., Feb 9 2021, In: Macromolecules. 54, 3, p. 1375-1387 13 p.

Research output: Contribution to journalArticlepeer-review

Rheology, Sticky Chain, and Sticker Dynamics of Supramolecular Elastomers Based on Cluster-Forming Telechelic Linear and Star Polymers

Mordvinkin, A., Döhler, D., Binder, W. H., Colby, R. H. & Saalwächter, K., Jun 8 2021, In: Macromolecules. 54, 11, p. 5065-5076 12 p.

Research output: Contribution to journalArticlepeer-review

Rheological response of entangled isotactic polypropylene melts in strong shear flows: Edge fracture, flow curves, and normal stresses

Parisi, D., Han, A., Seo, J. & Colby, R. H., Jul 1 2021, In: Journal of Rheology. 65, 4, p. 605-616 12 p.

Research output: Contribution to journalArticlepeer-review

Shear-induced nematic phase in entangled rod-like PEEK melts

Parisi, D., Seo, J., Schaake, R. P., Rhoades, A. M. & Colby, R. H., Jan 2021, In: Progress in Polymer Science. 112, 101323.

Research output: Contribution to journalReview articlepeer-review

Dual Nakamura model for primary and secondary crystallization applied to nonisothermal crystallization of poly(ether ether ketone)

Seo, J., Zhang, X., Schaake, R. P., Rhoades, A. M. & Colby, R. H., Oct 2021, In: Polymer Engineering and Science. 61, 10, p. 2416-2426 11 p.

Research output: Contribution to journalArticlepeer-review

Room Temperature to 150 °C Lithium Metal Batteries Enabled by a Rigid Molecular Ionic Composite Electrolyte

Yu, D., Pan, X., Bostwick, J. E., Zanelotti, C. J., Mu, L., Colby, R. H., Lin, F. & Madsen, L. A., Mar 25 2021, In: Advanced Energy Materials. 11, 12, 2003559.

Research output: Contribution to journalArticlepeer-review

Ion Transport and Mechanical Properties of Non-Crystallizable Molecular Ionic Composite Electrolytes

Bostwick, J. E., Zanelotti, C. J., Iacob, C., Korovich, A. G., Madsen, L. A. & Colby, R. H., Feb 25 2020, In: Macromolecules. 53, 4, p. 1405-1414 10 p.

Research output: Contribution to journalArticlepeer-review

Role of Chain Polarity on Ion and Polymer Dynamics: Molecular Volume-Based Analysis of the Dielectric Constant for Polymerized Norbornene-Based Ionic Liquids

Choi, U. H., Price, T. L., Schoonover, D. V., Xie, R., Gibson, H. W. & Colby, R. H., Dec 8 2020, In: Macromolecules. 53, 23, p. 10561-10573 13 p.

Research output: Contribution to journalArticlepeer-review

The Effect of Oligo(oxyethylene) Moieties on Ion Conduction and Dielectric Properties of Norbornene-Based Imidazolium Tf2N Ionic Liquid Monomers

Choi, U. H., Price, T. L., Schoonover, D. V., Gibson, H. W. & Colby, R. H., Jun 23 2020, In: Macromolecules. 53, 12, p. 4990-5000 11 p.

Research output: Contribution to journalArticlepeer-review