Dr. T.J. Dingemans

Biography

After obtaining my chemical engineering degree in Eindhoven, The Netherlands, I moved to the USA to pursue my Ph.D. degree under the direction of Professor Edward T. Samulski at the University of North Carolina at Chapel Hill. My work concentrated on the design and synthesis of novel molecular and polymeric non-linear liquid crystal geometries and I received my Ph.D. degree in 1998. In May 1998 was awarded a National Academy of Sciences NRC research fellowship, which allowed me to work at the National Aeronautic and Space Administration (NASA) in Langley, Virginia. In January 2003 I moved back to the Netherlands and joined the group of professor Sybrand van der Zwaag (Novel Aerospace Materials) and professor Stephen Picken (Nano Structured materials or NSM). In 2006 the Dutch Science Council (NWO) awarded me a VIDI grant, which allows me to expand our research efforts in the field of high-performance polymers and fibers and composites thereof.

Research interests

Our research in the field of aerospace polymers concentrates on the development of new polymeric materials, which will ultimately lead to enabling technologies for the aerospace industry. Our current emphasis is on tailoring and understanding the structure-property relationships of such new polymers. Our research areas include liquid crystal network polymers (LCTs), matrix resins (Aramide, PEEK, PEKK, PES, PPS, and PC-based) for composites and ballistics applications. All-aromatic ester-based nematic network polymers are of interest to the electronic and aerospace industry because these polymers exhibit a unique combination of thermal, physical and mechanical properties, i.e. Tg's in excess of 200 ^oC, high storage moduli (> 2 GPa above 200 ^oC) and excellent strength and elongation at break (~10% at r.t.). When applied in carbon fiber based composites our polymers perform better as compared to current state-of-the-art high-performance polymers such as PEI or PEEK.

Teaching activities

• AE-1202 "Materials and Structures for Aircraft and Spacecraft"

• AE4-X02 "Designing Materials with Aerospace Specific Properties"

• AE3-X01 "Modern Materials for Aerospace Applications. Part A"

• AE3-X02 "Modern Materials for Aerospace Applications. Part B"

• AE4-X05 "New Developments in Aerospace Polymers"
• IO1070 "Construeren" -lecture on Polymeric Materials (Faculty of Industrial Design)

• IO2070 "Technische Product Optimalisatie" -lecture on Polymeric Materials (Faculty of Industrial Design)

Key publications

• All-aromatic liquid crystal triphenylamine-based poly(azomethine)s as hole transport materials for opto-electronic applications, Hindson, J.C.; Ulgut, B.; Friend, R.H.; Greenham, N.C.; Norder, B.; Kotlewski, A.; Dingemans, T. J. Mater. Chem., 2010, 20, 937.
• All-Aromatic Liquid Crystalline Thermosets with High Glass Transition Temperatures, Iqbal, M.; Norder, B.; Mendes, E.; Dingemans, T.J. J. Polm. Sci.: Part A: Polym. Chem., 2009, 47, 1368.
• New All-Aromatic Liquid Crystal Architectures, Zafiropoulos, N.; Dingemans, T.J.; Li, Wen bin; Samulski, E.T.; Choi, E-Joon, Chem. Mater., 2008, 20, 3821.
• Poly(ether imide)s from Diamines with Para, Meta, and Ortho-Arylene Substitutions: Synthesis, Characterization and Liquid Crystalline Properties, Dingemans, T.J.; Mendes, E.; Hinkley, J.J.; Weiser, E.S.; StClair, T.L. Macromolecules, 2008, 41(7) 2474.
• Hydrogen Adsorption Strength and Sites in the Metal Organic Framework MOF-5, Mulder, F.M.; Dingemans, T.J.; Kearley, G.J., Chem. Phys., 2008, 351, 72.
• Comment on Thermotropic Biaxial Nematic Liquid Crystals. Madsen, L.A.; Dingemans, T.J.; Nakata, M.; Samulski, E.T. Phys. Rev. Lett. 2006, 96(21), 219804.
• Hydrogen Adsorption Strength in the Metal Organic Framework MOF-5.  Mulder, F.M.; Dingemans, T.J.; Kearley, G.J. J. Chem. Phys. 2005, 317, 113. 
• Wholly Aromatic Ether-imides. Potential Materials for n-Type Semiconductors, Dingemans, T.J.; StClair, T.L.; Samulski, E.T., Chem. Mater. 2004, 16, 966. 
• Thermotropic Biaxial Nematic Liquid Crystals, Madsen, L.A.; Dingemans, T.J.; Nakata, M.; Samulski, E.T. Phys. Rev. Lett. 2004, 42(14), 145505.
• Javelins, Hockey Sticks and Boomerang-Shaped Liquid Crystals.  Structural Variations on p-Quinquephenyl, Dingemans, T.J.; Samulski, E.T. J. Phys. Chem. B., 2001, 105, 8845. 
• Nonlinear Boomerang-Shaped Liquid Crystals Derived from 2,5-Bis(p-hydroxyphenyl)-1,3,4-oxadiazole, Dingemans, T.J.; Samulski, E.T. Liquid Crystals, 2000, 27, 131.

Personal website

• www.fam.lr.tudelft.nl/