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Displaying records 291 to 300 of 405 records.
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291. High Strain Rate Tissue Simulant Measurements Using digital Image Correlation
Topic: Materials Science
Published: 6/1/2009
Authors: Steven P Mates, Richard L. Rhorer, Richard Everett, Kirth Simmonds, Amit Bagchi
Abstract: Measuring the response of soft materials to high strain rate deformation is extremely challenging because of the difficulty of achieving dynamic equilibrium during high strain rate mechanical testing such as Kolsky bar testing. Digital image correlat ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902304

292. Capillary Instability in Nanoimprinted Polymer Films
Topic: Materials Science
Published: 5/21/2009
Authors: Kyle J. Alvine, Yifu Ding, Hyun Wook Ro, Brian C. Okerberg, Alamgir Karim, Christopher L Soles, Jack F Douglas
Abstract: Capillary forces play an active role in defining the equilibrium structure of nanoscale structures. This effect can be especially pronounced in soft materials such as polymers near or above their glass transition temperatures where material flow is ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852751

293. Response of Vascular Smooth Muscle Cells Under Mechanical Deformation Using Silane-Linked Laminin
Topic: Materials Science
Published: 4/22/2009
Authors: Joy P Dunkers, Juan M. Taboas
Abstract: For mechanotransduction studies, extracellular matrix proteins should be robustly attached to the surface to prevent cell delamination during deformation. The standard surface modification method is to incubate proteins on an oxidized, flexible surfa ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900879

294. Modelling of Thermodynamics and Diffusion in Multicomponent Systems
Topic: Materials Science
Published: 4/1/2009
Authors: Ursula R Kattner, Carelyn E Campbell
Abstract: The availability of reliable materials data is key to the successful design of materials and manufacturing processes.  Commercial alloys rarely consist of only two or three elements, but rather may contain a large number of elements for which the nee ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853592

295. Hydrogen-Steel Compatibility Research at NIST-Boulder
Topic: Materials Science
Published: 3/30/2009
Author: Thomas Allen Siewert
Abstract: The NIST Materials Reliability Division is outfitting a high pressure (100 MPa) hydrogen testing facility to collect mechanical and thermodynamic property data on various candidate structural materials, and is developing data on nondestructive sens ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902004

296. Dielectric Spectroscopy Investigation of Relaxation in C60-Polyisoprene Nanocomposites
Topic: Materials Science
Published: 3/23/2009
Authors: Yifu Ding, Sebastian Pawlus, Alexei Sokolov, Jack F Douglas, Alamgir Karim, Christopher L Soles
Abstract: We investigate the influence of adding C60 nanoparticles on the dielectric relaxation spectra of both unentangled and entangled polyisoprene (PIP). Relaxation modes corresponding to both segmental and chain relaxation were analyzed over a broad tempe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900194

297. Examination of thin film modulus for a series of poly(alkyl methacrylates)
Topic: Materials Science
Published: 3/22/2009
Authors: Jessica M. Torres, Christopher M Stafford, Bryan D. Vogt
Abstract: In this work, the modulus of polymer thin films for a homologous series of poly(n-alkyl methacrylate)s will be discussed. In particular, the impact of the degree of undercooling from bulk Tg on the deviations will be explored as Tg is significantly ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900216

298. Quantifying Residual Stress in Nanoscale Thin Polymer Films via Surface Wrinkling
Topic: Materials Science
Published: 3/19/2009
Authors: Jun Y. Chung, Thomas Q. Chastek, Michael J Fasolka, Hyun Wook Ro, Christopher M Stafford
Abstract: Residual stress, a pervasive consequence of solid materials processing, is stress that remains in a material after external forces have been removed. In polymeric materials, residual stress results from processes, such as film formation, that force ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902640

299. Measuring Photocatalytic Response of Metal Oxide Fillers in Polymeric Films Using Electron Paramagnetic Resonance Spectroscopy
Topic: Materials Science
Published: 3/18/2009
Authors: Stephanie S Watson, I-Hsiang Tseng
Abstract: Metal oxide fillers, such as titanium dioxide (TiO2), are heavily utilized in polymeric coatings and plastics for opacification, pigmentation, and mechanical enhancement. It is well known that the photoreactivity of TiO2 can contribute to the degrada ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902281

300. Polymerization Stress Development in Dental Composites: Effect of Cavity Design Factor
Topic: Materials Science
Published: 3/13/2009
Authors: Joseph M Antonucci, Anthony Albert Giuseppetti, Justin N.R. O'Donnell, Gary Edward Schumacher, Drago Skrtic
Abstract: Objective: To assess the effect of the cavity design factor (C-factor) on polymerization stress development (PSD) in resin composites. Methods: An experimental resin (BT resin) was prepared, which contained 2,2-bis[p-(2 hydroxy-3 -methacryloxypropoxy ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900229



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