Polymer Liquid Crystal (PLC) and Polypropylene Interlayers in Polypropylene and Glass Fiber Composites: Mechanical Properties (open access)

Polymer Liquid Crystal (PLC) and Polypropylene Interlayers in Polypropylene and Glass Fiber Composites: Mechanical Properties

In recent developments of composite materials, scientists and engineers have come up with fibers as well as matrices for composites and techniques of blending high cost components with low cost materials. Thus, one creates cost effective composite materials that are as efficient as space age components. One of the major breakthroughs in this area is the innovation of molecular composites, specifically polymeric liquid crystals (PLCs). These materials have excellent mechanical properties such as tensile impact and bending strength. They have excellent chemical resistance, low thermal expansivity, and low flammability. Their low viscosity leads to good processability One major setback in using space age composite technology in commercial applications is the price. Due to the complexity of processing, the cost of space composite materials is skyrocketing. To take the same concept of space age composite materials to create a more economical substitute has become a serious concern among scientists and engineers around the world. The two issues that will be resolved in this thesis are: (1) the potential impact of using PLCs (molecular reinforcement) can have on macro reinforced (heterogeneous composite, HC) long fiber systems; and (2) how strategic placement of the reinforcing layers can affect the macromechanical properties of the …
Date: December 2000
Creator: Maswood, Syed
System: The UNT Digital Library

Humor and Nursing Home Residents

Access: Use of this item is restricted to the UNT Community
Although humor is a generally accepted part of everyday life for humans, its existence, importance, and positive influence on older persons are often underestimated. The purposes of this study are to determine whether humor is a normal experience for nursing home residents, enhancing their activities of daily living, and whether it plays a role in contributing to their psychological well-being. The study includes a discussion of research on humor, particularly as it relates to the elderly and the aging process; analysis and comparisons based on interviews with residents on the subject of humor and review of their psychological state as evaluated by the MDS 2.0 nursing facility assessment; individual case studies, and anecdotes illustrating the beneficial contributions humor brings to the lives of nursing home residents.
Date: May 2000
Creator: Cecil, David P.
System: The UNT Digital Library