ReSource, Volume 13, 2001

ReSource, Volume 13, 2001

Date: 2001
Creator: University of North Texas
Description: ReSource magazine includes articles and notes about research at University of North Texas in various academic fields.
Contributing Partner: University Relations, Communications & Marketing department for UNT
ReSource, Volume 14, 2002-03

ReSource, Volume 14, 2002-03

Date: 2003
Creator: University of North Texas
Description: ReSource magazine includes articles and notes about research at University of North Texas in various academic fields.
Contributing Partner: University Relations, Communications & Marketing department for UNT
Determination of wear in polymers using multiple scratch test.

Determination of wear in polymers using multiple scratch test.

Date: August 2004
Creator: Damarla, Gowrisankar
Description: Wear is an important phenomenon that occurs in all the polymer applications in one form or the other. However, important links between materials properties and wear remain illusive. Thus optimization of material properties requires proper understanding of polymer properties. Studies to date have typically lacked systematic approach to all polymers and wear test developed are specific to some polymer classes. In this thesis, different classes of polymers are selected and an attempt is made to use multiple scratch test to define wear and to create a universal test procedure that can be employed to most of the polymers. In each of the materials studied, the scratch penetration depth s reaches a constant value after certain number of scratches depending upon the polymer and its properties. Variations in test parameters like load and speed are also studied in detail to understand the behavior of polymers and under different conditions. Apart from polystyrene, all the other polymers studied under multiple scratch test reached asymptotes at different scratch numbers.
Contributing Partner: UNT Libraries
Electric Field Induced Phase Transitions in Polymers: A Novel Mechanism for High Speed Energy Storage

Electric Field Induced Phase Transitions in Polymers: A Novel Mechanism for High Speed Energy Storage

Date: February 23, 2012
Creator: Ranjan, Vivek; Buongiorno Nardelli, Marco & Bernholc, Jerry
Description: This article discusses electric field induced phase transitions in polymers.
Contributing Partner: UNT College of Arts and Sciences
Development of a Simplified Fracture Toughness Tool for Polymers

Development of a Simplified Fracture Toughness Tool for Polymers

Date: August 1997
Creator: Marnock, Patrick J. (Patrick Joseph)
Description: This thesis presents research toward the development of a simple inexpensive fracture toughness tool for polymeric materials. Experiments were conducted to test the specimen configuration and the fracture toughness tool against an established ASTM standard for polymer fracture toughness, D5045, and a commonly used four-point bend method. The materials used in this study were polycarbonate and high density polyethylene. Reductions in both the production time and the variability resulting from the preparation of the specimens were addressed through the use of specially designed fixtures. The effects from the razor cut depths used in the chevron notch were compared to the fracture toughness values obtained in order to determine the effect upon the validity of the fracture toughness.
Contributing Partner: UNT Libraries