Professor, ORNL-UT Joint Faculty
The research in our group utilizes a variety of techniques to examine methods by which the properties of polymer mixtures can be optimized by control of dispersion size or by the selective migration of a polymeric additive to the surface. For instance, the dispersion of nanoscale particles or domains in a polymer matrix can lead to nonlinear enhancement of a variety of properties. Our group has developed an understanding of how manipulation and control of the structure of polymeric components can be utilized to efficiently and reproducibly disperse nanoscale domains (or particles) in a host polymer matrix, which can readily lead to nonlinear enhancement of material properties such as dimensional stability, flame resistance, and mechanical properties. We have also developed techniques to characterize the impact of specific branched architectures on the dynamics of a surface segregation process, the final surface structure and functionality, and the material properties of a surface-modified polymeric material. Thus, our research provides specific fundamental information to enable the design of multicomponent polymeric materials with such properties as self-healing chemical and flame resistance or hardness, exceptional impact strength, outstanding tensile properties, and dimensional stability.
Mark Dadmun received his B.S. in Chemical Engineering from the University of Massachusetts and a Ph.D. from the University of Massachusetts working with Prof. M. Muthukumar in Polymer Science and Engineering. He subsequently was awarded a National Research Council Post-doctoral Fellowship, which was completed at the National Institute of Standards and Technology working with Dr. Charles Han. Prof. Dadmun then joined the faculty of the Chemistry Department at the University of Tennessee, where he is now a Full Professor. His current appointments include Joint Faculty at Oak Ridge National Laboratory in the Chemical Science Division and Founding Director of the Soft Materials Research in Tennessee (SMART) Center.
B.S., University of Massachusetts (1987)
Ph.D., University of Massachusetts (1991)
Awards and Recognitions
NRC Postdoctoral Fellow
NSF CAREER Awardee
Organic Photovoltaics and Conjugated Polymers
- W. Yin, M.D. Dadmun “A New Model for the Morphology of P3HT/PCBM Organic Photovoltaics from Small Angle Neutron Scattering: Rivers and Streams.” ACS Nano, 5, 4756–4768 (2011)
- T. Etampawala, D. Ratnaweera, B. Morgan, S. Diallo, E. Mamontov, M. Dadmun “Monitoring the Dynamics of Miscible P3HT:PCBM Blends: A Quasi Elastic Neutron Scattering Study of Organic Photovoltaic Active Layers”, Polymer, 61, 155-162 (2015)
- H. Chen, Y. Hsiao, J. Chen, B. Hu, M.D. Dadmun “Distinguishing the Importance of Fullerene Phase Separation from Polymer Ordering in the Performance of Low Band Gap Polymer:Bis-Fullerene Heterojunctions” Adv. Funct. Mater. 24, 7284–7290 (2014)
- H. Chen, Y. Hsiao, B. Hu, M.D. Dadmun “Control of Morphology and Function of Low Band Gap Polymer: Bis-Fullerene Mixed Heterojunctions in Organic Photovoltaics with Selective Solvent Vapor Annealing” J. Mat. Chem. A, 2, 9883-9890 (2014)
- H. Chen, Y. Hsiao, B. Hu, M.D. Dadmun “Tuning the Morphology and Performance of Low Bandgap Polymer:Fullerene Heterojunctions via Solvent Annealing in Selective Solvents” Adv. Funct. Mat., 24, 5129-5136 (2014)
- S. Hu, O. Dyck, H. Chen, Y. Hsiao, B. Hu, G. Duscher, M.D. Dadmun, B. Khomami “The Impact of Selective Solvents on the Evolution of Structure and Function in Solvent Annealed Organic Photovoltaics” RSC Advances, 4, 27931-27938 (2014)
- C.S. Lee, W. Yin, A.P. Holt, J.R. Sangoro, A.P. Sokolov, M.D. Dadmun “Rapid and Facile Formation of P3HT Organogels via Spin-Coating: Tuning Functional Properties of Organic Electronic Thin Films”, Advanced Functional Materials, 25, 5848-5857 (2015)
Nanocomposites and Block Copolymers
- M. Mahdavi; M. Baniassadi, M. Baghani, M. Dadmun, M. Tehrani “3D Reconstruction of Carbon Nanotube Networks from Neutron Scattering Experiments”, Nanotechnology, 26, 385704 (2015)
- A. Imel, M.D. Dadmun “The Impact of Fullerenes on the Ordering of Polyacrylonitrile During Nanocomposite Formation”, Polymer, 75, 134-140 (2015)
- A.P. Holt, P.J. Griffin, V. Bocharova, A.L. Agapov, A.E. Imel, M.D. Dadmun, J.R. Sangoro, A.P. Sokolov “Dynamics at the Polymer/Nanoparticle Interface in Poly(2-vinylpyridine)/Silica Nanocomposites” Macromolecules, 47, 1837-1843 (2014)
- D. Banerjee, M.D. Dadmun, B. Sumpter, K. Schweizer, “Theory of the Miscibility of Fullerenes in Random Copolymer Melts”, Macromolecules, 46, 8732–8743 (2013)
- S.L. Teh, D. Linton, B. Sumpter, M.D. Dadmun, “Controlling Non-Covalent Interactions to Modulate the Dispersion of Fullerenes in Polymer Nanocomposites”, Macromolecules, 44, 7737-7745 (2011)
- K. Misichronis, S. Rangou, E. Ashcraft, R. Kumar, M.D. Dadmun, B.G. Sumpter, N.E. Zafeiropoulos, J.W. Mays, A.T. Avgeropoulos “Synthesis, Characterization and Theoretical Morphology Predictions of Poly(cyclohexadiene) Containing Triblock Coplymers” Polymer, 54, 1480-1489 (2013)
Lignin and Renewable Polymers
- C. Dyer, P. Driva, S. Sides, B. Sumpter, J. Mays, J. Chen, R. Kumar, M. Goswami, M. Dadmun “Effect of Macromolecular Architecture on the Morphology of Polystyrene–Polyisoprene Block Copolymers”, Macromolecules, 46, 2023-2031 (2013).
- D.R. Ratnaweera, D. Saha, S. V. Pingali, A. K. Naskar, M.D. Dadmun “Self-Assembly of Lignins in Solutions” RSC Advances, 5, 67258-67266 (2015)
- C. Dyer, Z. Jiang, J. Bozell, T. Rials, W.T. Heller, M.D. Dadmun “Effect of Chain Structure on the Miscibility of Cellulose Acetate Blends: A Small-Angle Neutron Scattering Study” Soft Matter, 9, 3402-3411 (2013)
- N. Henry, D. Harper, M.D. Dadmun “Optimizing Non-Covalent Interactions Between Lignin and Synthetic Polymers to Develop Effective Compatibilizers” Macro. Chem. & Phys., 213, 1196-1205 (2012).