|ALHASSAN, DANIEL - University Of New Orleans|
Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 9/19/2017
Publication Date: N/A
Technical Abstract: The temperature dependence of the tensile property of single cotton fiber was studied in the range of 160-300°C using Favimat test, and its statistical behavior was interpreted in terms of structural changes. The tenacity of control cotton fiber was well described by the single Weibull distribution, but when heating the fiber, its tenacity was better fitted by a mixture of two Weibull distributions. The determined Weibull parameters and the isodensity contour of the tenacity-elongation bivariate distribution showed that the presence and the relative abundance of the secondary distribution were dependent on temperature, indicating inhomogeneous thermal response of cotton fiber. Taking all the experimental evidence into account, we proposed the following sequential transitions: relaxation of amorphous cellulose at 160-180°C, crystallization of amorphous cellulose at 200-260°C, and thermal degradation of amorphous cellulose at 240-300°C.