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Research Professor. Engineering Building I (EB1) 2100C. gbmckenn@ncsu.edu. https://mckennagroup.wordpress.ncsu.edu. Bio. Research Focus Areas: Small Molecule Interactions with Glassy Polymers, Torsion & Normal Force Measurements, Nanorheology & Nanomechanics, Melt & Solution Rheometry, Residual Stresses in Composite Materials. Education.
- Dynamics of Polymers and Other Glass-Forming Materials
- Dynamics in Confinement and Nanorheology
- Nonlinear Viscoelasticity and Rejuvenation of Polymer Glasses
- Molecular Rheology and Rheological Characterization of Polymer Heterogeneity
His work has had a major impact on our understanding of the temperature dependence of the equilibrium dynamics of glass-forming systems deep into the glassy state. The purpose was to test whether super-Arrhenius behavior continues below the nominal Tg. Results from thermoviscoelastic studies of ancient amber ultra-stable glasses showed that the dyn...
After the discovery that small molecule glass-forming liquids exhibit reduced calorimetric glass transitions upon confinement in nanoporous matrixes, McKenna and co-workers developed innovative measurement methods to investigate the confinement physics in ultrathin polymer films. Their innovative approach was to shrink the classical membrane inflat...
Through creative measurements and construction of a unique torsional dilatometer, it was demonstrated that, although molecular mobility increases due to the application of large mechanical deformations, the underlying glassy state of an amorphous polymer is decoupled from deformation—contrary to the mechanical rejuvenation hypothesis.
Demonstrated that the viscosity and the viscoelastic properties of cyclic polystyrene macromolecules that even small amounts of linear chain contamination can lead to dramatic increases in viscosity of the rings. This specific result, interpreted as being due to the threading of the rings by the linear contaminant, has guided the study of the rheol...
Greg McKenna was appointed as Chief Executive Officer of Police Bank on 18 March 2020. Before his appointment, Greg had served as Chair of Police Bank from January 2019. He was also a Director between July 2012 and July 2018.
Dec 19, 2022 · The present collection of articles gives an impressive overview of diverse aspects in the field of polymer physics to which Dr. Gregory B. McKenna (Figure 1) contributed enormously with his work. The articles range from fundamental research to studies of applied materials.
- Reiner Zorn
- 63, Issue4
- 19 December 2022
Greg McKenna, MD, FRCS (C) A role for sunlight in skin cancer: UV-induced p53 mutations in squamous cell carcinoma. DE Brash, JA Rudolph, JA Simon, A Lin, GJ McKenna, HP Baden, ... G Testa, GJ...
Gregory B. McKenna attended the U.S. Air Force Academy from which he received his Bachelor's degree in Engineering Mechanics in 1970. As part of his active duty, he attended MIT where he earned a Masters Degree in the area of composite materials before being stationed.
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Aug 22, 2019 · Gregory B. McKenna, Ph.D. Chemical Engineering, Texas Tech Univeristy (accessed Aug 22, 2019). Note: This biography is an adaptation of the following article previously published by The Society of Rheology. Greg McKenna is the 2009 Bingham Medalist. Rheology Bulletin 2009, 78(2), 4.
