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Displaying 51 - 75 of 3838

Hydrolysis-Controlled Transport of Water in Polymeric Coatings

October 12, 2021
Author(s)
Sanghun Lee, Tinh Nguyen, Jonathan W. Martin, E Byrd
Thermoset acrylic melamine coatings are widely used for exterior structures. These materials are formulated by reacting an acrylic polyol with an alkylated melamine. Because the reactions are reversible, acrylic-melamine coatings tend to hydrolyze during

Imidazolium Modified Clay Based ABS Nanocomposites: A Comparison Between Melt-Blending and Solution Sonication Processes

October 12, 2021
Author(s)
M Modesti, S Besco, A Lorenzetti, Mauro Zammarano, V Causin, C Marega, Jeffrey W. Gilman, D M. Fox, Paul C. Trulove, Hugh C. De Long, P H. Maupin
Acrylonitrile-butadiene-styrene (ABS) nanocomposites containing imidazolium-modified montmorillonite have been prepared by melt-blending and solution-sonication in order to study the effects of processing on the morphology and properties of the polymer

Layered Double Hydroxides as Cation Exchange Materials

October 12, 2021
Author(s)
Paul Braterman, Nandika A. D'Souza, Jeffrey W. Gilman, Mickey C. Richardson, Laxmi K. Sahu, Mauro Zammarano
Layered double hydroxides (LDH) are a class of materials formally related to brucite-like hydroxides by the incorporation of higher valent cations, such as Al(III). The layer charge is neutralized by the insertion of any of a large range of exchangeable

MatML: XML for Information Exchange With Materials Property Data

October 12, 2021
Author(s)
A S. Varde, E F. Begley, S Fahrenholz-Mann
This paper describes the development and use of MatML, the Materials Markup Language. MatML is an emerging XML standard intended primarily for the exchange of materials property information. It provides a medium of communication for users in materials

Measuring Tip Shape for Instrumented Indentation Using Atomic Force Microscopy

October 12, 2021
Author(s)
Mark R. VanLandingham, John S. Villarrubia, R M. Camara
Atomic Force Microscopy (AFM) was used to determine the three-dimensional shape of probe tips used for instrumented indentation. AFM images were taken for three probe tips with several different image sizes. The geometry obtained directly from the images

Molecular Modeling of the Thermal Decomposition of Polymers

October 12, 2021
Author(s)
S I. Stoliarov, H Zhang, P R. Westmoreland, R Lyon, Marc R. Nyden
Applications presented in this work demonstrate the potential for using quantum mechanics and molecular simulations to determine the mechanisms and rates of the thermal decomposition of polymers. The expectation is that these capabilities can be used to

Optical Probes for Monitoring Intercalation and Exfoliation in Melt Processed Polymer Nanocomposites

October 12, 2021
Author(s)
P H. Maupin, Jeffrey W. Gilman, Richard H. Harris Jr., S Bellayer, Anthony J. Bur, S C. Roth, A B. Morgan, J R. Harris, M Murariu
Laser induced fluorescence spectroscopy of the optical probe Nile Blue A in polymer clay nanocomposites is described. Concentration quenching of fluorescence dominates probe behavior until the clay platelets are physically separated by polymer

Software Specifications for Build LCC

October 12, 2021
Author(s)
M A. Ehlen, S Fuller
The report provides a list of guidelines for integrating two software programs that are extensively used by agencies of the federal government to evaluate the cost effectiveness of building-related investments, mainly for energy and water conservation

Some Properties of Irregular 3-D Particles

October 12, 2021
Author(s)
Michael A. Taylor, Edward Garboczi, S T. Erdogan, D Fowler
This paper discusses some of the properties of irregular particles that are of interest to engineers, including volume, density, & surface area. Numerical and statistical information on these properties is essential (a) for a better understanding of

Species Formation and Burning Characteristics of Scaled Propane Compartment Fires

October 12, 2021
Author(s)
C J. Wieczorek, U Vandsburger, J E. Floyd
Fires occurring in dense occupancies such as hospitals, dormitories, and nursing homes pose a serious threat to occupants due to the risk of carbon monoxide poisoning. This risk is becoming increasingly important as the population demographics of developed

Study of Photodegradation of Epoxy Polymer by Using Slow Positron Annihilation Spectroscopy

October 12, 2021
Author(s)
R Zhang, Xiaohong Gu, H Chen, J Zhang, Y Li, Tinh Nguyen, T C. Sandreczki, Y C. Jean
Slow positron annihilation spectroscopy (SPAS) has been used to study the early stage of epoxy photodegradation. Spin-coated samples of a crosslinked epoxy were prepared by stoichiometrically mixing a diglycidyl ether of bisphenol A epoxy resin with 1,3
Displaying 51 - 75 of 3838