D
Dan Powell
Researcher at Goddard Space Flight Center
Publications - 6
Citations - 331
Dan Powell is an academic researcher from Goddard Space Flight Center. The author has contributed to research in topics: Dynamic mechanical analysis & Percolation. The author has an hindex of 3, co-authored 5 publications receiving 311 citations. Previous affiliations of Dan Powell include University of Maryland, College Park.
Papers
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Journal ArticleDOI
Electrical and rheological percolation in polystyrene/MWCNT nanocomposites
Arun K. Kota,Bani H. Cipriano,Matthew K. Duesterberg,Alan L. Gershon,Dan Powell,Srinivasa R. Raghavan,Hugh A. Bruck +6 more
TL;DR: In this article, a systematic electrical and rheological characterization of percolation in commercial polydisperse polystyrene (PS) nanocomposites containing multiwall carbon nanotubes (MWCNTs) is presented.
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Quantitative characterization of the formation of an interpenetrating phase composite in polystyrene from the percolation of multiwalled carbon nanotubes
TL;DR: In this article, an interpenetrating phase polymer nanocomposite formed by the percolation of multiwalled carbon nanotubes (MWCNTs) in polystyrene (PS) has been quantitatively characterized through electrical conductivity measurements and melt rheology.
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Characterization of Processing Effects in HIPS-CNF Composites Using Thermogravimetric Analysis
TL;DR: In this paper, the effects of solvent processing and twin-screw extrusion on the weight loss rates and the corresponding temperatures were studied using thermogravimetric analysis, and it was shown that the extrusion process resulted in composites that had better thermal stability compared to the solvent processed ones.
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Combinatorial development of polymer nanocomposites using transient processing conditions in twin screw extrusion
TL;DR: In this paper, a new approach for combinatorial development of polymer nanocomposites with compositional gradients (CGs) was presented, which was developed using transient processing conditions in twin screw extrusion with small quantities of expensive nanoscale fillers.
Book
High Sensitivity, Low Power Nano Sensors and Devices for Chemical Sensing
TL;DR: In this paper, a nanotechnology-enabled chemical sensor has been developed at NASA Ames leveraging nanostructures such as single walled carbon nanotubes (SWNTs) and metal oxide nanobelts or nanowires, as a sensing medium bridging a pair of interdigitated electrodes (IDE) realized through a silicon-based microfabrication and micromachining technique.