Results 101 to 110 of about 448 (151)
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Elastomeric polyurethanes reinforced with aramid fibers
Journal of Applied Polymer Science, 1989AbstractThermolplastic polyurethane is a relatively new development in the elastomers field, combining elastomeric behavior with thermoplastic processing characteristics. Thus, high production rate and reduced scrap can be achieved but, increased versatility for the incorporation of additives is also possible.
A. G. Andreopoulos +2 more
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Abstract This article examines the factors that influence the development of high-performance aramid fibers and other synthetic high-performance fibers. It highlights the importance of suitable monomers, solvents, and fiber processing conditions.
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Strain birefringence of Kevlar aramid fibers
Journal of Applied Polymer Science, 1987AbstractWe have measured the strain birefringence of Kevlar aramid fibers under static loading via a spectrophotometric method. At very low strain rates, the birefringence of Kevlar fibers increases markedly with increasing strain. On initial straining, the birefringence increases even at relatively constant modulus.
H. H. Yang, M. P. Chouinard, W. J. Lingg
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Creep and strength retention of aramid fibers
Journal of Applied Polymer Science, 2012AbstractCreep tests at ambient conditions have been carried out on Kevlar 49 and Technora yarns covering a wide stress spectrum (10–70% average breaking load) for a long period of time (up to a year). The results confirm that Kevlar 49 and Technora yarns show a nonlinear behavior at stresses below 40% of the breaking load and a linear behavior at ...
Ioannis P. Giannopoulos +1 more
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Structural Properties of Aramid Fibers and Their Influence on Fiber Adhesion
1990Aramid fibers exhibit low adhesive behaviors that are believed to result from fiber morphology, however, the morphology-property relations are not well understood. In this report we compare Kevlar-49 and Technora aramid fibers to evaluate the relations between adhesive behavior of aramid fibers and their morphology. Ion implantation of Kevlar-49 fibers
J. Kalantar, L. T. Drzal, D. S. Grummon
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Moisture content of aramid and polybenzimidazole fibers
Thermochimica Acta, 1990Abstract The moisture loading characteristics of two Kevlar fibers (49 and 149), two aramid copolymer fibers (X-500 and Technora), and two polybenzimidazole fibers (unmodified and sulfonated forms) were studied as a function of relative humidity (11–97% RH) by TG.
Steven E. Keinath, Roger J. Morgan
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Kevlar and Other Aramid Fibers
2018The name poly-paraphenylene terephthalamide, doesn’t exactly roll of the tongue, which is presumably why Dupont gave it the much cooler commercial name of Kevlar. Kevlar was invented by Stephanie Louise Kwolek (1923–2014) and Paul Wintrop Morgan (1911–1992) at E. I. du Pont de Nemours and Company for which US patent 3287323A “Process for the production
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A new coupling agent for aramid fibers
Journal of Applied Polymer Science, 1989AbstractVarious compounds were used for the surface treatment of aramid fibers in order to promote adhesion to polymeric matrices. The improvement of adhesive bond could be based either on the roughness of fiber surface or on chemical modification introduced by grafting.
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