Daniel Fragiadakis

Research Physicist
Polymer Physics Section, Code 6120
Naval Research Laboratory
Washington, DC 20375-5342

Research Interests


  1. Pressure densified 1,3,5-tri(1-naphthyl)benzene glass. I. Volume recovery and physical aging
    A.P. Holt, D. Fragiadakis, and C.M. Roland J. Chem. Phys. 151, 184502 (2019).

  2. The complex behavior of the “simplest” liquid: breakdown of density scaling in tetramethyl tetraphenyl trisiloxane
    T.C. Ransom, R. Casalini, D. Fragiadakis, and C.M. Roland J. Chem. Phys. 151, 174501 (2019).

  3. Comment on "Experimental Evidence for a State-Point-Dependent Density-Scaling Exponent of Liquid Dynamics"
    T.C. Ransom, R. Casalini, D. Fragiadakis, A.P. Holt, and C.M. Roland Phys. Rev. Lett. 123, 189601 (2019).

  4. Effect of temperature on the impact failure of elastomeric coatings
    G. Montella, C.B. Giller, A.P. Holt, D. Fragiadakis, R.M. Gamache, and C.M. Roland J. DoD Res. & Eng., in press (2019).

  5. Chain flexibility and the segmental dynamics of polymers
    D. Fragiadakis and C.M. Roland J. Phys. Chem. B 123, 5930 (2019).

  6. Stability limits of pressure densifed polycarbonate glass
    A.P. Holt, D. Fragiadakis, J.A. Wollmershauser, B.N. Feigelson, M. Tyagi, and C.M. Roland Macromolecules 52, 4139 (2019).

  7. Intermolecular distance and density scaling of dynamics in molecular liquids
    D. Fragiadakis and C.M. Roland J. Chem. Phys. 150, 204501 (2019).

  8. The alpha and Johari-Goldstein Relaxations in 1,4-Polybutadiene: Breakdown of Isochronal Superpositioning
    T.C. Ransom, D. Fragiadakis, and C.M. Roland Macromolecules, (2018).

  9. Cooperativity of short-time dynamics revisited
    D. Fragiadakis and C.M. Roland J. Non-Cryst. Solids, in press (2018).

  10. Participation in the Johari−Goldstein process: molecular liquids versus polymers
    D. Fragiadakis and C.M. Roland Macromolecules in press (2017).

  11. Role of structure in the α and β dynamics of a simple glass-forming liquid
    D. Fragiadakis and C.M. Roland Phys. Rev. E 95, 022607 (2017).

  12. Deformation of polyurea: Where does the energy go?
    P.H. Mott, C.B. Giller, D. Fragiadakis, D.A. Rosenberg and C.M. Roland Polymer 105, 227 (2016).

  13. Elastomer-Metal Laminate Armor,
    R.M. Gamache, C.B. Giller, G. Montella, D. Fragiadakis, C.M. Roland Materials and Design 111, 362 (2016).

  14. Rotational dynamics of simple, asymmetric molecules,
    D. Fragiadakis, C.M. Roland Phys. Rev. E 91, 022310 (2015).

  15. Dynamic Correlation Length Scales under Isochronal Conditions,
    R. Casalini, D. Fragiadakis, C.M. Roland J. Chem. Phys. 142, 064504 (2015).

  16. Phase Behavior and Dynamics of a Cholesteric Liquid Crystal,
    D. Roy, D. Fragiadakis, C.M. Roland, R. Dabrowski, J. Dziaduszek, S. Urban J. Chem. Phys. 140, 074502 (2014).

  17. Characteristics of the Johari-Goldstein Process in Rigid Asymmetric Molecules,
    D. Fragiadakis, C.M. Roland Phys. Rev. E 88, 042307 (2013).

  18. Volumetric study of n-octyloxy-cyanobiphenyl (8OCB)
    C.M. Roland, D. Fragiadakis, D. Roy, S. Urban Liquid Crystals 41, 9 (2014).

  19. Hybrid Inorganic-Organic Poly(carborane-siloxane-arylacetylene) Structural Isomers with In-Chain Aromatics: Synthesis and Properties,
    M.K. Kolel-Veetil, D.D. Dominguez, C.A. Klug, K.P. Fears, S.B. Qadri, D. Fragiadakis, T.M. Keller J. Polym. Sci. Part A: Polym. Chem. 51, 2638 (2013).

  20. Are Polar Liquids Less Simple?,
    D. Fragiadakis, C.M. Roland J. Chem. Phys. 138, 12A502 (2013).

  21. Factors Influencing the Ballistic Impact Resistance of Elastomer-Coated Metal Substrates,
    C.M. Roland, D. Fragiadakis, R.M. Gamache, R. Casalini Philos. Mag. 93, 468 (2013).

  22. Molecular Dynamics Simulations of the Johari-Goldstein Relaxation in a Molecular Liquid,
    D. Fragiadakis and C.M. Roland Phys. Rev. E 86, 020501 (2012).

  23. Volumetric, Dielectric, Calorimetric and X-ray Studies of Smectogenic 10PBO8 at Atmospheric and Elevated Pressures,,
    C.M. Roland, D. Fragiadakis, R. Bogoslovov, S. Urban, R. Dabrowski, M. Tykarska, N. Osiecka, and J. Czub Liquid Crystals 39, 993 (2012).

  24. Microstructure and segmental dynamics of polyurea under uniaxial deformation,
    T. Choi, D. Fragiadakis, C.M. Roland, J. Runt Macromolecules 45, 3581 (2012).

  25. The Role of Hard Segment Content on the Molecular Dynamics of Poly(tetramethylene oxide) Based Polyurethane Copolymers,
    A. Castagna, D. Fragiadakis, H.-K. Lee, T. Choi, J. Runt, Macromolecules 44, 7831 (2011).

  26. Relaxation Dynamics of Polymethylacrylate at Elevated Pressure,
    R. Casalini, D. Fragiadakis, C.M. Roland Macromolecules 44, 6928 (2011).

  27. Dynamics near the filler surface in natural rubber-silica nanocomposites,
    D. Fragiadakis, L. Bokobza, P. Pissis, Polymer 52, 3175 (2011).

  28. Phase Diagram and Dynamics of the Liquid Crystal Isopentylcyanobiphenyl (5*CB),
    D. Fragiadakis, S. Urban, M. Massalska-Arodz, R.B. Bogoslovov, J. Czub, C.M. Roland J. Phys. Chem. B 118, 6437 (2011).

  29. Predicting the Density-Scaling Exponent of a Glass-Forming Liquid from Prigogine-Defay Ratio Measurements,
    D. Gundermann, U.R. Pedersen, T. Hecksher, N. Bailey, B. Jakobsen, T. Christensen, N.B. Olsen, T.B. Schrøder, D. Fragiadakis, R. Casalini, C.M. Roland, J.P. Dyre, K. Niss Nature Physics 7, 816 (2011).

  30. Strength Enhancement from Heterogeneous Networks of Ethylene-Propylene / Ethylene-Propylene-Diene,
    G.S. Buckley; D. Fragiadakis; C.M. Roland Rubber Chem. Tech. 84, 520 (2011).

  31. Dynamic Heterogeneity and Density Scaling in 1,4-polyisoprene,
    D. Fragiadakis; R. Casalini; R.B. Bogoslovov; C.G. Robertson; C.M. Roland, Macromolecules 44, 1149 (2011).

  32. Connection between dynamics and thermodynamics of liquids on the melting line,
    D. Fragiadakis; C.M. Roland, Phys. Rev. E. 83, 031504 (2011).

  33. On the density scaling of liquid dynamics,
    D. Fragiadakis; C.M. Roland J. Chem. Phys. 134, 044504 (2011).

  34. Correlation of nonexponentiality with dynamic heterogeneity from four-point dynamic susceptibility χ4(t) and its approximation χT(t),
    C.M. Roland; D. Fragiadakis; D. Coslovich; S. Capaccioli; K.L. Ngai, J. Chem. Phys. 133, 144507 (2010).

  35. Dynamics of Uniaxially Oriented Elastomers Using Broadband Dielectric Spectroscopy,
    H.K. Lee; D. Fragiadakis; D. Martin; A. Milne; J. Milne; J. Runt, Macromolecules 43, 3125 (2010).

  36. Elastomer-steel laminate armor,
    C.M. Roland; D. Fragiadakis; R.M. Gamache, Compos. Struct. 92, 1059 (2010).

  37. Segmental dynamics of polyurea: Effect of stoichiometry,
    D. Fragiadakis; R. Gamache; R.B. Bogoslovov; C.M. Roland, Polymer 51, 178 (2010).

  38. Dielectric Spectroscopy and Thermally Stimulated Depolarization Current Analysis of Multiphase Polymer Systems,
    P. Pissis, A. Kyritsis, D. Fragiadakis, Chapter 12 in Handbook of Multiphase Polymer Systems, A. Boudenne, L. Ibos, Y. Candau and S. Thomas (eds), Wiley – Blackwell, 2011.

  39. Density Scaling and Dynamic Correlations in Viscous Liquids,
    D. Fragiadakis; R. Casalini; C.M. Roland, J. Phys. Chem. B 113, 13134 (2009).

  40. Molecular mobility and Li+ conduction in polyester copolymer ionomers based on poly(ethylene oxide),
    D. Fragiadakis; S. Dou; R.H. Colby; J. Runt, J. Chem. Phys. 130, 064907 (2009).

  41. Molecular mobility, ion mobility, and mobile ion concentration in poly(ethylene oxide)-based polyurethane ionomers,
    D. Fragiadakis; S.C. Dou; R.H. Colby; J. Runt, Macromolecules 41, 5723 (2008).

  42. Broadband dielectric relaxation spectroscopy in polymer nanocomposites,
    P. Pissis; D. Fragiadakis; A. Kanapitsas; K. Delides, Macromol. Symp. 265, 12 (2008).

  43. Dielectric studies of segmental dynamics in epoxy nanocomposites,
    P. Pissis; D. Fragiadakis, J. Macromol. Sci. Part B-Phys. 46, 119 (2007).

  44. Modified chain dynamics in poly(dimethylsiloxane)/silica nanocomposites,
    D. Fragiadakis; P. Pissis; L. Bokobza, J. Non-Cryst. Solids 352, 4969 (2006).

  45. Nanostructured and nanocomposite hydrogels for biomedical applications,
    A. Spanoudaki; D. Fragiadakis; K. Vartzeli-Nikaki; P. Pissis; J.C.R. Hernandez; M.M. Pradas, in Surface Chemistry in Biomedical and Environmental Science (NATO Science Series), J.P. Blitz and V.M. Gun'ko, eds., Springer (2006).

  46. Polyimide/silica nanocomposites with low values of dielectric permittivity,
    D. Fragiadakis; E. Logakis; P. Pissis; V.Y. Kramarenko; T.A. Shantalii; I.L. Karpova; K.S. Dragan; E.G. Privalko; A.A. Usenko; V.P. Privalko, J. Phys: Conf. Series 10, 139 (2005).

  47. Glass transition and molecular dynamics in poly (dimethylsiloxane)/silica nanocomposites,
    D. Fragiadakis; P. Pissis; L. Bokobza, Polymer 46, 6001 (2005).

  48. Reinforcement effect of carbon nanofillers in an epoxy resin system: Rheology, molecular dynamics, and mechanical studies,
    R. Kotsilkova; D. Fragiadakis; P. Pissis, J. Polym. Sci. Pt. B-Polym. Phys. 43, 522 (2005).

  49. Polyimides reinforced with the sol-gel derived organosilicon nanophase as low dielectric permittivity materials,
    V.Y. Kramarenko; T.A. Shantalil; I.L. Karpova; K.S. Dragan; E.G. Privalko; V.P. Privalko; D. Fragiadakis; P. Pissis, Polym. Adv. Technol. 15, 144 (2004).

  50. Molecular order and dynamics in block copolymers of poly(oxybutylene) and poly(oxyethylene),
    D. Fragiadakis; M. Bouga; A. Kyritsis; P. Pissis; K. Viras; W. Mingvanish; C. Booth, Macromol. Symp. 191, 21 (2003).