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Search Publications

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Displaying 13201 - 13225 of 74309

The Effects of Nanostructure on the Stability of Nanocomposite Building Materials

February 19, 2017
Author(s)
Marc R. Nyden, Samuel Manzello, Richard H. Harris Jr.
Thermoplastics and composites made from hydrocarbon polymers can improve the affordability, strength-to-weight ratio, and durability of manufactured products. Unfortunately, the use of these materials in buildings and vehicles is limited because of their

The Speed, Grain Boundary Morphology, and Composition Changes Resulting from DIGM

February 19, 2017
Author(s)
John W. Cahn, C M. Elliott, P C. Fife, O Penrose
We use the equations for steady-state diffusion-induced grain boundary motion (DIGM), derived from our phase-field model, [17] to predict the grain boundary morphology and speed of DIGM, as well as the resulting compositions profiles, when the specimen

Thermal Degradation and Flammability Properties of Nanocomposites

February 19, 2017
Author(s)
Takashi Kashiwagi, A B. Morgan, Joseph M. Antonucci, Richard H. Harris Jr., E A. Grulke, J N. Hilding, Jack F. Douglas
Thermal degradation and flammability properties of the two types of nanocomposites with nanosilica and carbon nanotubes were studied. PMMA, poly(metheyl methacrylate), nanocomposites were made by in situ radical polymerization of MMA, methylmethacrylate

Thermal Degradation Studies of Alkyl-Imidazolium Salts and Their Application in Nanocomposites

February 19, 2017
Author(s)
W H. Awad, Jeffrey W. Gilman, Marc R. Nyden, Richard H. Harris Jr., T E. Sutto, J H. Callahan, Paul C. Trulove, H X. DeLong
Increasing the thermal stability of organically modified layered silicates is one of the key points in the successful technical application of polymer layered-silicates nanocomposites on the industrial scale. To circumvent the detrimental effect of the

Thermal Diffusivity of AIN Using the Photothermal Deflection Technique

February 19, 2017
Author(s)
E J. Gonzalez
The thermal conductivity of AIN specimens doped with Y2O3(5 wt.%) was determined using the photothermal deflection technique. The results agree within 10% of measurements previously made using the laser flash method. Thermal measurements on as-fired thin

Thermodynamics and Phase Diagrams

February 19, 2017
Author(s)
Ursula R. Kattner
Thermodynamics is a field of physics and chemistry. It uses mathematics to describe changes in energy and entropy (disorder) of a material that is subject to mechanical, thermal or chemical action. It is most frequently used to describe the conditions that

Time Resolved Size Distributions of Test Smokes and Nuisance Aerosols

February 19, 2017
Author(s)
Thomas Cleary
An electrical low-pressure impactor (ELPI) has been used to measure the size distribution of various test smokes and nuisance aerosols generated in the fire emulator/detector evaluator (FE/DE). Previously reported size results were time-averaged values

Toward an Integrated Concrete Performance Prediction Tool

February 19, 2017
Author(s)
Barbara C. Lippiatt
Industrial engineers and construction specifiers are increasingly concerned about the implications of their material design and product selection decisions, respectively, for the environment and public health. How will a given concrete design affect global

Transient Creep Cavity Growth in Structural Ceramics

February 19, 2017
Author(s)
A F. Bower, Tze J. Chuang
Long-term service life of a load-bearing ceramic component such as a turbine blade atelevated temperatures is often controlled by the rates of nucleation and growth of creepcavities at grain junctions and interfaces within the microstructure of the

U.S.-Japan Joint Panel on Wind and Seismic Effects

February 19, 2017
Author(s)
Stephen A. Cauffman
The U.S.-Japan Joint Panel on Wind and Seismic Effects is now entering its 33rd year. The Panel was formed in 1969 under the auspices of the U.S.-Japan Cooperative Program on Natural Resources (UJNR), one of three collateral programs that comprise the U.S

Ultra-Cold Collisions of Atoms and Molecules

February 19, 2017
Author(s)
Paul S. Julienne
The study of collisions of neutral atoms and molecules at ultralow collision energies is made possible by advances in techniques for cooling and trapping such species. Excellent reviews of laser cooling of atoms are given in the Nobel Lectures of Chu 2

Ultrasonic Extraction/Anodic Stripping Voltammetry for Determining Lead in Household Paint: Summary of a Laboratory Study

February 19, 2017
Author(s)
Walter J. Rossiter Jr, Blaza Toman, M Vangel, M E. McKnight, M Baghai Anaraki, A Signor, I Emenanjo, E Byrd
This paper summarizes the results a three-year study conducted to evaluate the reliability of field-portable ultrasonic extraction-anodic stripping voltammetry (UE/ASV) for determining the amount of lead in laboratory-prepared and field-sampled paint films

Unresolved Issues Related to Predicting the Service Life of Polymeric Materials

February 19, 2017
Author(s)
Jonathan W. Martin, Tinh Nguyen
Linking field and laboratory exposure results and predicting the service life of a polymeric materials exposed in its intended service environment have been major research goals of the polymeric materials community for over a century. Three methodologies
Displaying 13201 - 13225 of 74309