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Thermophysical and Mechanical Properties of Polymer Liquid Crystals and Their Blends (open access)

Thermophysical and Mechanical Properties of Polymer Liquid Crystals and Their Blends

Tensile properties, namely the elastic modulus, tensile strength, percent of elongation at yield and at the break were determined for the pure components and blends. The results are connected to the respective phase diagrams and demonstrate that blending makes property manipulation possible. Blends for which the mechanical properties are better than those of pure EPs can be obtained.
Date: May 1994
Creator: López, Betty Lucy
System: The UNT Digital Library
Spectroscopic Properties of Polycyclic Aromatic Compounds (open access)

Spectroscopic Properties of Polycyclic Aromatic Compounds

The fluorescence spectrum of many polycyclic aromatic compounds (PACs) depends upon solvent polarity. The emission spectrum of PAC monomers consists of several major vibronic bands labeled I, II, etc., in progressive order. Emission intensity enhancement of select bands is observed in polar solvents.
Date: May 1994
Creator: Tucker, Sheryl A. (Sheryl Ann)
System: The UNT Digital Library
A Study of the Processing Properties of Hard-Particle Reinforced Composite Solders (open access)

A Study of the Processing Properties of Hard-Particle Reinforced Composite Solders

The microstructural, mechanical and thermal properties of various composite solder formulations were investigated. Special interest was given in observing the processing properties, microstructural characteristics, fatigue behavior, tensile strength, and the effect of environmental ageing on the composite solder formulations. The solderability parameters wetting and speed of soldering, reflow temperature, and the thermal stability of the resulting composite solder were also examined.
Date: May 1994
Creator: Calderon, Jose Guadalupe
System: The UNT Digital Library
The Study of Hydration of Fly Ash in the Presence of Calcium Nitrate and Calcium Formate (open access)

The Study of Hydration of Fly Ash in the Presence of Calcium Nitrate and Calcium Formate

This research was designed to investigate the hydration reaction of fly ash when exposed to water. The effects that calcium nitrate and calcium formate have on the hydration reactions were also examined.
Date: May 1994
Creator: Hill, Russell L. (Russell Lee)
System: The UNT Digital Library