Results 221 to 230 of about 173,570 (263)

Morphological modification of UHMPE fibers

Polymers for Advanced Technologies, 1994
AbstractUHMPE fibers can display several morphological features, including skin‐core, microfibrillar and shish‐kebab structures. In this work, an attempt was made to eliminate these morphologies by treating the UHMPE in a two‐roll mill, at temperatures ranging from ambient to 145°C.
J. Economy, A. G. Andreopoulos
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Morphological characteristics of carbon fibers

Polymer Mechanics, 1977
Scanning electron microscopy has been used to study the surface, before and after thermochemical treatment, and the fracture sites of PAN carbon fibers heat-treated at 2100°C. The fractographs are analyzed in an attempt to estimate the effect of various defects on the strength of PAN carbon fibers.
A. S. Fialkov, N. V. Polyakova, N. V. Bondarenko, V. A. Mikhailova, B. N. Smirnov, S. G. Zaichikov   +5 more
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The morphological stability of polycrystalline fibers

Acta Metallurgica, 1989
Abstract Zirconium acetate (yttrium nitrate) precursor fibers, produced by dry spinning, were placed upon a single crystal Al2O3 substrate. Upon heat treatment, the precursor fibers pryrolyzed and densified, producing polycrystalline ZrO2 (8 mol% Y2O3) fibers which were sintered to the substrate. Further heat treatment to induce grain growth produced
K.T. Miller, F.F. Lange
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Morphology of man‐made fibers

Journal of Applied Polymer Science, 1968
AbstractRecent advances in electron microscopy of polymer systems have produced new structure theories (lamellar versus micellar) and considerable speculation on the nature of synthetic fiber structure. This paper illustrates what can be seen directly on the structure of nylon 66, polyester, and acrylic fibers with high‐resolution and scanning electron
R. D. Van Veld, G. Morris, H. R. Billica
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Effects of Fiber Morphology in Short Fiber Reinforced Composites

International Journal of Polymeric Materials, 1995
Abstract The upper and lower bounds of fiber/fiber interaction effects induced by the different fiber morphologies in a short fiber reinforced composite were studied using an axisymmetric finite element (FE) model that employs a periodic hexagonal array of elastic short fibers embedded in an elastoplastic matrix.
H. G. Kim, D. J. Lee
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Morphological foundations of fiber properties

Journal of Polymer Science Part C: Polymer Symposia, 1965
AbstractStructural theories which have been developed to interpret the chemical, physical, and mechanical properties of fibers are reviewed, with particular emphasis on the natural fibers. It is pointed out that many of the current theories of fiber structure derive from early concepts of the natural cellulosic or vegetable fibers.
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Mechanical properties and micro-morphology of fiber posts

Dental Materials, 2013
To evaluate flexural properties of different fiber posts systems and to morphologically characterize their micro-structure.Six types of translucent fiber posts were selected: RelyX Post (3M ESPE), ParaPost Taper Lux (Colthéne-Whaledent), GC Fiber Post (GC), LuxaPost (DMG), FRC Postec Plus (Ivoclar-Vivadent), D.T. Light-Post (RTD).
ZICARI, FRANCESCA, Coutinho E, SCOTTI, ROBERTO, Van Meerbeek B, Naert I.   +4 more
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The ultrastructural morphology of the muscle fiber in myotonic dystrophy

Acta Neuropathologica, 1968
Biopsies from three patients with different clinical and pathological stages of myotonic dystrophy were studied by phase and electron microscopy. Large sarcoplasmic masses and spiral annulets were prominent in Cases 1 and 2 while in Case 3, featured clinically by atrophic weakness, they were infrequent.
J M, Schröder, R D, Adams
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Functional morphology of the endomysium in series fibered muscles

Journal of Morphology, 1992
AbstractMany skeletal muscles, including the feline biceps femoris, are composed of short, tapered myofibers arranged in an overlapping longitudinal series. The endomysium of such muscles transfers tension between overlapping myofibers, and is thus an elastic element in series with them.
J A, Trotter, P P, Purslow
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The morphology of the cervical giant fiber neuron ofDrosophila

Brain Research, 1981
The morphology of the cervical giant fiber (CGF) neuron of Drosophila melanogaster was studied by intracellular injection of Lucifer yellow dye. The CGF neuron is the command cell in a motor circuit causing visually driven escape behavior: a single action potential in a CGF axon produces patterned activity in jump and flight muscles.
M, Koto, M A, Tanouye, A, Ferrus, J B, Thomas, R J, Wyman   +4 more
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