Thesis Details


Thesis Title: 'Determining density of thermoplastic fibers by differential scanning calorimetry
Thesis Author: Ben Duke
Abstract: Density is one of the most commonly tested characteristics of thermoplastic fibers and is a function of fiber crystallinity, which has a great impact on dyeing, strength, and several other yarn and fabric characteristics. Knowledge of sample density, therefore, provides a wealth of information about the behavior of the fiber during processing and in finished products and is useful in product development. The density gradient column has traditionally been used to determine the density of textile fibers. The gradient column method for determining density requires several hours to obtain accurate results, requires the use of carcinogenic chemicals, and provides only a measure of bulk density. Thus, the textile industry would benefit from alternate means of determining fiber density. Differential scanning calorimetry (DSC) is a method that is used frequently to identify the characteristics of thermoplastic fibers. DSC can also be used to obtain information about fiber morphology, blend ratios, and percent add-on of fiber finishes. The use of DSC can provide quick measurements of fiber characteristics that allow a better understanding ofthe materials used in the textile industry, which is important to developing new products, as well as controlling process parameters in rapid response to quality measures. The results of this research indicated that although DSC does not provide density measurements as accurately as the density column method, it does provide a rapid estimate of sample density and a more thorough representation of the sample composition than does the bulk density measurement provided by the density column method.