THERMAL SHRINKAGE OF AN ORIENTED POLYESTER YARN AS A FUNCTION OF TIME, TEMPERATURE, AND STRESS

被引:18
作者
RIBNICK, A
机构
[1] Textile Research Institute Princeton
关键词
Activation Energy; Crystallization; Equations; Fine Structure (Fibers); Kinetics; Mechanism (Fundamental); Models (Mathematical); Molecular Structure (Fibers); Polyesters; Rate; Recrystallization; Shrinkage; Stress; Temperature; Thermal Stability; Time; Yarns;
D O I
10.1177/004051756903900807
中图分类号
TB3 [工程材料学]; TS1 [纺织工业、染整工业];
学科分类号
0805 ; 080502 ; 0821 ;
摘要
Measurements have been made with a linear variable-displacement transducer of the thermal shrinkage of an oriented polyester yarn in dry nitrogen as a function of time, temperature, and stress. The shrinkage of this material has been found to be nonlinear with respect to these three variables. A modified form of the Tobolsky and Eyring creep-rate equation has been found to describe the temperature and stress dependence. The activation energy for the process has been estimated to be 55.6 kcal/mole and the displacement volume to be 810 Å3. Interpretation of these experimental results appears to support a recently proposed model that thermal shrinkage of oriented semicrystalline polymers is a reflection of a structural transformation between extended-chain and folded-chain crystallites. © 1969, SAGE Publications. All rights reserved.
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页码:742 / &
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