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
The Impact of a Father and Son on Texas: Isaac Van Zandt and Khleber Miller Van Zandt (open access)

The Impact of a Father and Son on Texas: Isaac Van Zandt and Khleber Miller Van Zandt

Isaac Van Zandt and his son Khleber Miller Van Zandt were instrumental figures in the growth of Texas and the development of the town of Fort Worth, Texas. Isaac Van Zandt was one of the main members of the delegation from Texas to the United States who negotiated for annexation. He also played a major part in the Texas Constitutional Convention of 1845 and made a run for governor before his death in 1847. His son, Khleber Miller Van Zandt was a Confederate soldier and businessman who saw something in the outpost of Fort Worth that was worth developing. Along with an influential group of other businessmen he was a part of every major development that occurred in Fort Worth until his death in 1930. Both Van Zandts' roles are discussed and the importance of their actions is brought to light.
Date: December 2006
Creator: Cranz, Jane Sloan
System: The UNT Digital Library
School Spirit or School Hate: The Confederate Battle Flag, Texas High Schools, and Memory, 1953-2002 (open access)

School Spirit or School Hate: The Confederate Battle Flag, Texas High Schools, and Memory, 1953-2002

The debate over the display of the Confederate battle flag in public places throughout the South focus on the flag's display by state governments such South Carolina and Mississippi. The state of Texas is rarely placed in this debate, and neither has the debate adequately explore the role of high schools' use of Confederate symbols. Schools represent the community and serve as a symbol of its values. A school represented by Confederate symbols can communicate a message of intolerance to a rival community or opposing school during sports contests. Within the community, conflict arose when an opposition group to the symbols formed and asked for the symbols' removal in favor of symbols that were seen more acceptable by outside observers. Many times, an outside party needed to step in to resolve the conflict. In Texas, the conflict between those in favor and those oppose centered on the Confederate battle flag, and the memory each side associated with the flag. Anglos saw the flag as their school spirit. African Americans saw hatred.
Date: December 2006
Creator: Dirickson, Perry
System: The UNT Digital Library
The Rise of a Two-Party State: A Case Study of Houston and Harris County, Texas, 1952-1962 (open access)

The Rise of a Two-Party State: A Case Study of Houston and Harris County, Texas, 1952-1962

This thesis discusses the rise of the Republican party in Texas and specifically Harris County. The time period is the decade between the Presidential election of Dwight D. Eisenhower and the campaign of Jack Cox for Governor. Changes in the structure and leadership of the Republican party at the state level and specific precincts are examined in detail in chapter one. Leaders in Houston during this time period, such as Jesse Jones, Roy Cullen, and Oveta Culp Hobby are discussed in chapter two. The elections of Eisenhower, Cox, and Republican John Tower are analyzed in chapter three. The conclusion finds six major factors for the political changes occurring in Harris County, including economic and demographic changes. Main sources for this work included the Harris County Democratic party records and the Jack Cox Papers at the Center for American History, the Eisenhower Library, and the John Tower Papers.
Date: December 2007
Creator: Dunbar, Crystal Rose
System: The UNT Digital Library